Research activity information

• Oct. 2019 神戸大学, 2019 President Award, 財務貢献者

  Hitoshi Hirose


• Oct. 2018 神戸大学, 神戸大学 平成30年度学長表彰, 財務貢献者

  HIROSE HITOSHI

  Others


• Apr. 2011 National Reseearch Institute for Earth Science and Disaster Prevention, President Award

  Hitoshi Hirose


• May 2008 Earth, Planets and Space Editorial Board, 2007 EPS Award, Repeating short- and long-term slow slip events with deep tremor activity around the Bungo channel region, southwest Japan

  Hitoshi Hirose

• Did Short‐Term Preseismic Crustal Deformation Precede the 2011 Great Tohoku‐Oki Earthquake? An Examination of Stacked Tilt Records

  Hitoshi Hirose, Aitaro Kato, Takeshi Kimura

  Jun. 2024, Geophysical Research Letters, 51(12) (12), English

  [Refereed]

  Scientific journal

  Link to Kobe Univ. Repository (Kernel)


• Distribution of crustal deformation based on geodetic observations and its relationship with active faults

  Takuya Nishimura, Takao Tabei, Takeshi Matsushima, Hitoshi Hirose

  Jun. 2024, Active Fault Research, 60, 39 - 44, Japanese

  [Refereed]

  Scientific journal


• Long-term slow slip events with and without tremor activation in the Bungo Channel and Hyuganada, southwest Japan

  Hitoshi Hirose, Takeshi Matsushima, Takao Tabei, Takuya Nishimura

  Abstract Slow slip events (SSEs) lasting for approximately 1 year occur every 6–8 years around the Bungo Channel in the southwest Japan subduction zone. The slip time evolution of the latest Bungo Channel SSE that occurred in 2018–2019 has been studied; however, the detailed spatial and temporal relationship between the slip process and other nearby phenomena, such as tectonic tremors and SSEs, is not well understood. Moreover, the migration of such long-term SSEs from Hyuganada to Shikoku through the Bungo Channel has been suggested, but a slip process connecting the SSEs has not been observed. In this study, we utilized 21 continuous global navigation satellite system (GNSS) stations around the Bungo Channel and Hyuganada that have been installed by us since 2014 in addition to GNSS Earth Observation System (GEONET) stations to improve the spatial resolution of such interplate slip. Based on these data, we estimate the spatial and temporal slip evolutions of the major SSE in 2018–2019, which was accompanied by tremor activity in the deep episodic tremor and slip (ETS) zone, and a smaller SSE in 2015–2016 without tremor activity. We show that the slip area of the major SSE overlaps the ETS zone, whereas that of the smaller SSE does not. This strongly suggests that synchronized tremor activity with an SSE requires a slip close to or overlapping the ETS zone. We also show two distinct slip propagation paths from the Oita area during the 2018–2019 sequence: one is a southward propagation to the Miyazaki area, leading to an SSE around the Miyazaki Plain, and the other is an eastward propagation to an area close to Cape Ashizuri, where “invading slip” is proposed to propagate from the ETS zone to a shallower megathrust source area. These slip propagations may be two of fundamental slip modes that connect slow-slip patch-like areas around the Bungo Channel and Hyuganada. Graphic Abstract

  Springer Science and Business Media LLC, May 2023, Earth, Planets and Space, 75(1) (1), English

  [Refereed]

  Scientific journal

  Link to Kobe Univ. Repository (Kernel)


• Development of a detection method for short-term slow slip events using GNSS data and its application to the Nankai subduction zone

  Yutaro Okada, Takuya Nishimura, Takao Tabei, Takeshi Matsushima, Hitoshi Hirose

  Jan. 2022, Earth, Planets and Space, 74(1) (1), English

  [Refereed]

  Scientific journal


• Slip distributions of short‐term slow slip events in Shikoku, southwest Japan from 2001 to 2019 based on tilt change measurements

  Hitoshi Hirose, Takeshi Kimura

  American Geophysical Union (AGU), May 2020, Journal of Geophysical Research: Solid Earth

  [Refereed]

  Scientific journal

  Link to Kobe Univ. Repository (Kernel)


• Possible shallow slow slip events in Hyuga-nada, Nankai subduction zone, inferred from migration of very low frequency earthquakes

  Youichi Asano, Kazushige Obara, Takanori Matsuzawa, Hitoshi Hirose, Yoshihiro Ito

  Jan. 2015, GEOPHYSICAL RESEARCH LETTERS, 42(2) (2), 331 - 338, English

  [Refereed]

  Scientific journal


• The Boso slow slip events in 2007 and 2011 as a driving process for the accompanying earthquake swarm

  Hitoshi Hirose, Takanori Matsuzawa, Takeshi Kimura, Hisanori Kimura

  Apr. 2014, GEOPHYSICAL RESEARCH LETTERS, 41(8) (8), 2778 - 2785, English

  [Refereed]

  Scientific journal


• Comprehensive model of short- and long-term slow slip events in the Shikoku region of Japan, incorporating a realistic plate configuration

  Takanori Matsuzawa, Bunichiro Shibazaki, Kazushige Obara, Hitoshi Hirose

  Oct. 2013, GEOPHYSICAL RESEARCH LETTERS, 40(19) (19), 5125 - 5130, English

  [Refereed]

  Scientific journal


• Fractional seismic velocity change related to magma intrusions during earthquake swarms in the eastern Izu peninsula, central Japan

  Tomotake Ueno, Tatsuhiko Saito, Katsuhiko Shiomi, Bogdan Enescu, Hitoshi Hirose, Kazushige Obara

  Dec. 2012, JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH, 117, English

  [Refereed]

  Scientific journal


• Recurrent slow slip event likely hastened by the 2011 Tohoku earthquake

  Hitoshi Hirose, Hisanori Kimura, Bogdan Enescu, Shin Aoi

  Sep. 2012, PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA, 109(38) (38), 15157 - 15161, English

  [Refereed]

  Scientific journal


• Modeling of slow slip events along the deep subduction zone in the Kii Peninsula and Tokai regions, southwest Japan

  Bunichiro Shibazaki, Kazushige Obara, Takanori Matsuzawa, Hitoshi Hirose

  Jun. 2012, JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH, 117, English

  [Refereed]

  Scientific journal


• Insights into the mechanism of intermediate-depth earthquakes from source properties as imaged by back projection of multiple seismic phases

  E. Kiser, M. Ishii, C. H. Langmuir, P. M. Shearer, H. Hirose

  Jun. 2011, JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH, 116, English

  [Refereed]

  Scientific journal


• Automated detection of slow slip events within the Nankai subduction zone

  Takeshi Kimura, Kazushige Obara, Hisanori Kimura, Hitoshi Hirose

  Jan. 2011, GEOPHYSICAL RESEARCH LETTERS, 38(1) (1), English

  [Refereed]

  Scientific journal


• Tilt records prior to the 2011 off the Pacific coast of Tohoku Earthquake

  Hitoshi Hirose

  2011, EARTH PLANETS AND SPACE, 63(7) (7), 655 - 658, English

  [Refereed]

  Scientific journal

  Link to Kobe Univ. Repository (Kernel)


• Spatial distribution and focal mechanisms of aftershocks of the 2011 off the Pacific coast of Tohoku Earthquake

  Youichi Asano, Tatsuhiko Saito, Yoshihiro Ito, Katsuhiko Shiomi, Hitoshi Hirose, Takumi Matsumoto, Shin Aoi, Sadaki Hori, Shoji Sekiguchi

  2011, EARTH PLANETS AND SPACE, 63(7) (7), 669 - 673, English

  [Refereed]

  Scientific journal


• Modeling short- and long-term slow slip events in the seismic cycles of large subduction earthquakes

  Takanori Matsuzawa, Hitoshi Hirose, Bunichiro Shibazaki, Kazushige Obara

  Blackwell Publishing Ltd, Dec. 2010, Journal of Geophysical Research: Solid Earth, 115(12) (12), English

  [Refereed]

  Scientific journal


• Along-strike variations in short-term slow slip events in the southwest Japan subduction zone

  Shutaro Sekine, Hitoshi Hirose, Kazushige Obara

  Blackwell Publishing Ltd, Sep. 2010, Journal of Geophysical Research: Solid Earth, 115(9) (9), English

  [Refereed]

  Scientific journal


• Modeling the activity of short-term slow slip events along deep subduction interfaces beneath Shikoku, southwest Japan

  Bunichiro Shibazaki, Shuhui Bu, Takanori Matsuzawa, Hitoshi Hirose

  Apr. 2010, JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH, 115(B4) (B4), English

  [Refereed]

  Scientific journal


• Recurrence behavior of short-term slow slip and correlated nonvolcanic tremor episodes in western Shikoku, southwest Japan

  Hitoshi Hirose, Kazushige Obara

  Blackwell Publishing Ltd, 2010, Journal of Geophysical Research: Solid Earth, 115(6) (6), English

  [Refereed]

  Scientific journal

  Link to Kobe Univ. Repository (Kernel)


• Slow Earthquakes Linked Along Dip in the Nankai Subduction Zone

  H. Hirose, Y. Asano, K. Obara, T. Kimura, T. Matsuzawa, S. Tanaka, T. Maeda

  American Association for the Advancement of Science ({AAAS}), 2010, Science, 330(6010) (6010), 1502 - 1502

  [Refereed]

  Scientific journal


• Stress field beneath the landward trench slope formed by the motion of the Kuril forearc sliver

  Y. Ito, H. Hirose, K. Obara

  海洋出版, 2007, Chikyu Monthly, 29(5) (5), 307 - 312, Japanese

  Scientific journal


• Slow Earthquakes Coincident with Episodic Tremors and Slow Slip Events

  Y. Ito, K. Obara, K. Shiomi, S. Sekine, H. Hirose

  American Association for the Advancement of Science ({AAAS}), Jan. 2007, Science, 315(5811) (5811), 503 - 506

  [Refereed]

  Scientific journal


• Non-volcanic deep low-frequency tremors accompanying slow slips in the southwest Japan subduction zone

  Kazushige Obara, Hitoshi Hirose

  Elsevier {BV}, Apr. 2006, Tectonophysics, 417(1-2) (1-2), 33 - 51

  [Refereed]

  Scientific journal


• Short-term slow slip and correlated tremor episodes in the Tokai region, central Japan

  Hitoshi Hirose, Kazushige Obara

  American Geophysical Union ({AGU}), 2006, Geophysical Research Letters, 33(17) (17)

  [Refereed]

  Scientific journal


• Repeating short- and long-term slow slip events with deep tremor activity around the Bungo channel region, southwest Japan

  Hitoshi Hirose, Kazushige Obara

  Springer Nature, Oct. 2005, Earth, Planets and Space, 57(10) (10), 961 - 972

  Scientific journal


• Episodic slow slip events accompanied by non-volcanic tremors in southwest Japan subduction zone

  Kazushige Obara, Hitoshi Hirose, Fumio Yamamizu, Keiji Kasahara

  American Geophysical Union ({AGU}), 2004, Geophysical Research Letters, 31(23) (23)

  [Refereed]

  Scientific journal


• A 3-D Quasi-static Model for a Variety of Slip Behaviors on a Subduction Fault

  Hitoshi Hirose, Kazuro Hirahara

  Springer Nature, 2004, Pure and Applied Geophysics, 161(11-12) (11-12)

  [Refereed]

  Scientific journal


• A model for complex slip behavior on a large asperity at subduction zones

  Hitoshi Hirose, Kazuro Hirahara

  American Geophysical Union ({AGU}), Nov. 2002, Geophysical Research Letters, 29(22) (22), 25 - 1

  [Refereed]

  Scientific journal


• A slow thrust slip event following the two 1996 Hyuganada Earthquakes beneath the Bungo Channel, southwest Japan

  Hitoshi Hirose, Kazuro Hirahara, Fumiaki Kimata, Naoyuki Fujii, Shin'ichi Miyazaki

  American Geophysical Union ({AGU}), Nov. 1999, Geophysical Research Letters, 26(21) (21), 3237 - 3240

  [Refereed]

  Scientific journal

• An Examination of Short-Term Preseismic Crustal Deformation that Preceded the 2011 Tohoku-Oki Earthquake

  Hitoshi Hirose

  Lead, Mar. 2025, Science of Slow-to-Fast Earthquakes Newsletter, 4, 11, Japanese

  [Invited]

  Introduction other


• Smoothing GNSS coordinate time series data with statsmodels

  Hitoshi Hirose

  Lead, Jun. 2023, Report of Research Center for Urban Safety and Security, Kobe University, 27, 1 - 8, Japanese

  Report research institution

  Link to Kobe Univ. Repository (Kernel)


• A constraint on the updip limit of the slip area of a short-term slow slip event in Northern Kii P eninsula based on tilt offset data

  Yohei Soejima, Hitoshi Hirose

  Last, Jun. 2021, Report of Research Center for Urban Safety and Security, Kobe University, 25, 9 - 21, Japanese

  Introduction research institution

  Link to Kobe Univ. Repository (Kernel)


• Long-term variation in the activity of short-term slow-slip events

  Hitoshi Hirose

  Lead, Jan. 2021, 新学術領域「スロー地震学」ニュースレター, 5, 4 - 5, Japanese

  Introduction other


• A trial for an estimation of stress change from the number of earthquakes

  Hitoshi Hirose, Tomoki Ukawa

  Lead, Jun. 2020, 神戸大学都市安全研究センター研究報告, 24, 10 - 17, Japanese

  Report research institution

  Link to Kobe Univ. Repository (Kernel)


• Development of a method of common-mode error reduction from GNSS displacement time-series data

  Hitoshi Hirose

  Lead, Jun. 2019, 神戸大学都市安全研究センター研究報告, 23, 18 - 25, Japanese

  Report research institution


• Calculation of time-dependent stress change due to a slow slip event: an application to a Boso slow slip event and the comparison with its accompanying earthquake swarm

  Hitoshi Hirose, Takanori Matsuzawa

  Lead, 神戸大学, Jun. 2018, 神戸大学都市安全研究センター研究報告, 22, 20 - 25, Japanese

  Report research institution

  Link to Kobe Univ. Repository (Kernel)


• 豊後水道水ノ子島での地震観測

  中東和夫, 蔵下英司, 松島健, 手操佳子, 宮町凜太郎, 渡邉早姫, 廣瀬仁

  06 Oct. 2017, 日本地震学会秋季大会講演予稿集(CD-ROM), 2017, ROMBUNNO.S02‐P06, Japanese


• Slip inversion for a slow slip event based on tilt change data

  TAMURA WAKAKO, KIMURA TAKESHI, HIROSE HITOSHI

  神戸大学都市安全研究センター, 2017, 神戸大学都市安全研究センター研究報告, 21, 16 - 26, Japanese

  Link to Kobe Univ. Repository (Kernel)


• Interplate slip resolution around the Bungo Channel area, southwest Japan, with GNSS observation

  竹内里紗, HIROSE HITOSHI, 松島健, 田部井隆雄, 西村卓也

  神戸大学都市安全研究センター, Jun. 2016, 神戸大学都市安全研究センター研究報告, 20, 9 - 17, Japanese

  Link to Kobe Univ. Repository (Kernel)


• Interaction between slow earthquakes in and around Bungo channel, Nankai subduction zone

  OBARA Kazushige, TAKAGI Ryota, YAMASHITA Yusuke, ASANO Youichi, MATSUZAWA Takanori, TANAKA Sachiko, HIROSE Hitoshi, MAEDA Takuto

  2016, 日本地球惑星科学連合大会予稿集(Web), 2016, ROMBUNNO.SCG21‐05 (WEB ONLY), English


• The 2007 and 2011 Boso slow slip events: a driving process for the accompanying earthquake swarm

  HIROSE HITOSHI, 松澤孝紀, 木村武志, 木村尚紀

  神戸大学都市安全研究センター, Jun. 2015, 神戸大学都市安全研究センター研究報告, 19, 1 - 9, Japanese

  Link to Kobe Univ. Repository (Kernel)


• A coherent occurrence of slow earthquakes around the Bungo Channel area and its implication for seismic hazard assessment

  HIROSE HITOSHI

  神戸大学都市安全研究センター, Mar. 2014, 神戸大学都市安全研究センター研究報告, (18) (18), 16 - 22, Japanese

  Link to Kobe Univ. Repository (Kernel)


• 2011年東北地方太平洋沖地震が房総半島スロースリップイベントを促進した可能性

  HIROSE Hitoshi, KIMURA Hisanori, ENESCU Bogdan, AOI Shin

  Mar. 2013, 神戸大学都市安全研究センター研究報告, 17, Japanese

  Link to Kobe Univ. Repository (Kernel)


• 房総半島沖スロースリップイベント (2011年10-11月)

  KIMURA Hisanori, HIROSE Hitoshi

  Mar. 2012, 地震予知連絡会会報, 87, 185-190, Japanese


• 西南日本における短期的スロースリップイベント (2011年6月～2011年10月)

  HIROSE Hitoshi, KIMURA Hisanori

  Mar. 2012, 地震予知連絡会会報, 87, 430-437, Japanese


• 防災科学技術研究所高感度地震観測網が捉えた2011年東北地方太平洋沖地震 -観測記録・被害・対応-

  MATSUBARA Makoto, SHIOMI Katsuhiko, TAKEDA Tetsuya, KIMURA Hisanori, MATSUMOTO Takumi, HIROSE Hitoshi, ASANO Youichi, SAITO Tatsuhiko, MATSUZAWA Takanori, UENO Tomotake, KIMURA Takeshi, MIYOSHI Takayuki, TANAKA Sachiko, ENESCU Bogdan, MATSUBAYASHI Hirotoshi, KAZAKAMI Tomoe, HARYU Yoshikatsu

  防災科学技術研究所, Feb. 2012, 防災科学技術研究所主要災害調査, 48, 15-51(48) (48), 15 - 51, Japanese


• Fractional seismic velocity change related to magma intrusions during earthquake swarms in the eastern Izu peninsula, central Japan

  UENO Tomotake, SAITO Tatsuhiko, SHIOMI Katsuhiko, ENESCU Bogdan, HIROSE Hitoshi, OBARA Kazushige

  2012, Journal of Geophysical Research, 117(B12) (B12)


• 西南日本における短期的スロースリップイベント(2010年11月～2011年5月)

  KIMURA Takeshi, HIROSE Hitoshi

  Nov. 2011, 地震予知連絡会会報, 86, 474-479, Japanese


• 2011年東北地方太平洋沖地震前の傾斜記録

  HIROSE Hitoshi

  Nov. 2011, 地震予知連絡会会報, 86, 298-302, Japanese


• 歪・傾斜統合解析による短期的SSE断層モデルの推定

  板場智史, 松本則夫, 北川有一, 小泉尚嗣, 木村武志, 木村尚紀, 廣瀬仁, 針生義勝

  01 Oct. 2011, 日本地震学会秋季大会講演予稿集, 2011, 106, Japanese


• 第191回地震予知連絡会についての報告

  廣瀬 仁

  10 Sep. 2011, 日本地震学会ニュースレター : News letter, 23(3) (3), 47 - 48, Japanese


• 短期的スロースリップイベントの活動時間に関する特徴

  木村武志, 廣瀬仁, 小原一成, 木村尚紀

  01 Oct. 2010, 日本地震学会秋季大会講演予稿集, 2010, 242, Japanese


• Hi‐net傾斜データおよびGEONETデータによる2009‐2010年豊後水道長期的スロースリップイベントのすべり過程

  廣瀬仁, 木村武志, 小原一成

  01 Oct. 2010, 日本地震学会秋季大会講演予稿集, 2010, 241, Japanese


• Hi-net伊東観測点における雑微動自己相関関数と傾斜変化-伊豆半島東方沖の群発地震活動に注目して-

  上野友岳, 齊藤竜彦, 汐見勝彦, ENESCU Bogdan, 廣瀬仁

  2010, 日本地震学会秋季大会講演予稿集, 2010


• 傾斜記録を用いた短期的スロースリップイベントの自動検出

  木村武志, 小原一成, 木村尚紀, 廣瀬仁

  01 Oct. 2009, 日本地震学会秋季大会講演予稿集, 2009, 200, Japanese


• 2007年EPS賞受賞コメント

  廣瀬 仁

  10 Jul. 2008, 日本地震学会ニュースレター, 20(2) (2), 19 - 19, Japanese


• 平成20年 (2008年) 岩手 宮城内陸地震 : KiK-net 永久変位および国土地理院GPS変位データに基づく断層モデル (防災科研)

  廣瀬仁

  2008, 地震予知連絡会会報, 81, 156 - 157


• プレート境界遷移領域ゆっくりすべりの指標としての深部低周波微動

  小原一成, 前田拓人, 関根秀太郎, 廣瀬仁, 上野友岳

  2007, 日本地震学会秋季大会講演予稿集, 2007


• 東海地域における短期的スロースリップイベントと深部低周波微動活動

  廣瀬仁

  2006, 地震予知連絡会会報, 75, 375 - 379


• 「2005年地震学夏の学校」総合報告

  浅野 陽一, 汐見 勝彦, 廣瀬 仁, 中川 茂樹, 林 広樹

  10 Nov. 2005, 日本地震学会ニュースレター, 17(4) (4), 4 - 5, Japanese


• 西南日本の短期的スロースリップイベントと低周波微動 (2004年11-12月紀伊半島北部 愛知 四国西部)

  廣瀬仁

  2005, 地球惑星科学関連学会2005年合同大会


• 繰り返し発生する房総半島沖 slow slip?

  廣瀬仁

  2001, 日本地震学会講演予稿集, 2001, 140 - 140


• ゆっくり地震--地震像がかわる

  広瀬 仁, 平原 和朗, 宮崎 真一

  岩波書店, Mar. 2000, 科学, 70(3) (3), 200 - 206, Japanese


• Structure of lunar seismic scattering zone and attenuation of surface waves

  HIROSE Hitoshi, SUDA Naoki

  09 Oct. 1998, 日本地震学会講演予稿集 = Programme and abstracts, the Seismological Society of Japan, 1998(2) (2), Japanese

• 地震の大事典

  平田 直, 森田 裕一, 岩崎 貴哉, 古村 孝志, 石山 達也, 佐藤 比呂志, 小原 一成, 西山 昭仁, 佐竹 健治

  Contributor, 6.3.2 スロースリップイベント, 朝倉書店, Jun. 2025, ISBN: 9784254160826


• CD-ROM TEXT GEODESY

  福田洋一, 田部井隆雄, 里村幹夫

  Contributor, 第3部 (2004年版) 20「Hi-netによる微動とゆっくり地震」, The Geodetic Society of Japan, Dec. 2004, Japanese

  Textbook

• 陸上GNSSデータと海域GNSS-Aデータを用いた日向灘におけるプレート間固着の推定

  小松理子, 西村卓也, 松島健, 廣瀬仁

  日本地球惑星科学連合2025年大会, May 2025, Japanese

  Oral presentation


• 高感度地震観測網による地殻変動・スロー地震

  廣瀬仁

  研究集会「日本列島を覆う地震観測網とそれらが捉えた諸現象」, May 2025, Japanese

  [Invited]

  Invited oral presentation


• GNSS データを用いた日向灘におけるプレート間固着状況の推定

  小松理子, 西村卓也, 松島健, 廣瀬仁

  日本測地学会第142回講演会, Oct. 2024, Japanese

  Poster presentation


• Did Short-Term Preseismic Crustal Deformation Precede the 2011 Great Tohoku-Oki Earthquake? An Examination of Stacked Tilt Records

  Hirose Hitoshi, Aitaro Kato, Takeshi Kimura

  International Joint Workshop on Slow-to-Fast Earthquakes 2024, Sep. 2024, English

  Poster presentation


• 傾斜データに基づく SSE 検出のための機械学習手法の開発

  廣瀬仁, 比嘉友香, 藤井春水, 木村武志

  学術変革領域「Slow-to-Fast地震学」(B03 班) Slow-to-Fast地震のモデリングと予測 2023 年度研究集会, Mar. 2024, Japanese

  Oral presentation


• A stacking analysis of the tilt record prior to the 2011 great Tohoku earthquake

  Hitoshi Hirose, Aitaro Kato, Takeshi Kimura

  2023 SSJ Fall Meeting, Oct. 2023, Japanese

  Oral presentation


• Development of a machine learning model to detect short-term SSEs from tilt records

  Tomoka Higa, Hitoshi Hirose, Takeshi Kimura

  International Joint Workshop on Slow-to-Fast Earthquakes 2023, Sep. 2023, English

  Poster presentation


• Long-term slow slip events with and without tremor activation in the Bungo Channel and Hyuganada

  Hirose H, Matsushima T, Tabei T, Nishimura T

  Japan Geoscience Union Meeting 2023, May 2023, English

  Oral presentation


• Development of a machine learning model to detect short-term slow slip events from tilt records

  Tomoka Higa, Hitoshi Hirose, Takeshi Kimura

  Japan Geoscience Union Meeting 2023, May 2023, Japanese

  Poster presentation


• Long-term slow slip events with and without tremor activation in the Bungo Channel and Hyuganada, southwest Japan

  Hitoshi Hirose, Takeshi Matsushima, Takao Tabei, Takuya Nishimura

  Grant-in-Aid for Transformative Research Areas "Science of Slow-to-Fast Earthquakes" Group B03 meeting, Mar. 2023, English

  Oral presentation


• スロー地震の用語について: 測地学的見地から

  廣瀬仁

  スロー地震に関する用語整頓のためのワークショップ, Mar. 2023, Japanese

  [Invited]

  Invited oral presentation


• Periodic changes in activity pattern of short-term slow slip events in the northern Kii Peninsula, Japan

  Hitoshi Hirose, Naoya Chujo, Takeshi Kimura

  International Joint Workshop on Slow-to-Fast Earthquakes 2022, Sep. 2022, English

  Poster presentation


• Changes in long-term activity patterns of interplate slip from short-term slow slip events in the northern Kii Peninsula, Japan

  Naoya Chujo, Hitoshi Hirose, Takeshi Kimura

  Japan Geoscience Union Meeting 2022, Jun. 2022, English

  Poster presentation


• Stress changes caused by Boso slow slip events inferred from seismicity data

  Tomoki Ukawa, Hitoshi Hirose

  Japan Geoscience Union Meeting 2022, Jun. 2022, English

  Poster presentation


• The moment release rate of short-term slow slip events in the northern Kii Peninsula based on NIED Hi-net tilt data (2002-2020)

  Naoya Chujo, Hitoshi Hirose, Takeshi Kimura

  International Joint Workshop on Slow Earthquakes 2021, Sep. 2021, English

  Oral presentation


• Slow slip events in the Bungo Channel and Hyuganada areas from 2018 to 2019 detected by a GNSS observation network

  Hitoshi Hirose, Takeshi Matsushima, Takao Tabei, Takuya Nishimura

  International Joint Workshop on Slow Earthquakes 2021, Sep. 2021, English

  Poster presentation


• A comparison of the source areas in Hyuganada among afterslip of two interplate earthquakes in 1996 and successive slow slip events

  Sawako Teshiba, Hitoshi Hirose

  Japan Geoscience Union Meeting 2021, Jun. 2021, Japanese

  Poster presentation


• Preliminary results of ocean bottom pressure observation around Kikai submarine caldera, SW Japan

  Yuko Asai, Nobukazu Seama, Tomoko Hanyu, Tetsuo Matsuno, Hitoshi Hirose, Takuto Minami, Hiroko Sugioka

  Japan Geoscience Union Meeting 2021, Jun. 2021, Japanese

  Oral presentation


• Slow slip events in the Bungo Channel and Hyuganada areas from May 2018 to June 2019 detected by a GNSS observation network

  Hitoshi Hirose, Takeshi Matsushima, Takao Tabei, Takuya Nishimura

  Japan Geoscience Union Meeting 2021, Jun. 2021, English

  Poster presentation


• Development of the detection method for short-term slow slip events using GNSS data and its application to the Nankai subduction zone

  Yutaro Okada, Takuya Nishimura, Takao Tabei, Takeshi Matsushima, Hitoshi Hirose

  Japan Geoscience Union Meeting 2021, Jun. 2021, English

  Oral presentation


• The moment release rate of short-term slow slip events in the northern Kii Peninsula from 2002 to 2015 based on NIED Hi-net tilt data

  Naoya Chujo, Hitoshi Hirose, Takeshi Kimura

  Japan Geoscience Union Meeting 2021, Jun. 2021, English

  Oral presentation


• Slow Slip Events in the Afterslip Area of the 1996 Hyuganada Earthquakes, Southwest Japan, Based on GNSS Data

  Sawako Teshiba, Hitoshi Hirose

  AGU Fall Meeting 2020, Dec. 2020, English

  Poster presentation


• GNSSデータを用いた短期的スロースリップイベントの検出手法の開発と南海沈み込み帯への適用

  岡田悠太郎, 西村卓也, 田部井隆雄, 松島健, 廣瀬仁

  日本測地学会第134回講演会, Oct. 2020, Japanese

  Oral presentation


• Development of the Detection Method for Short-term Slow Slip Events by Using GNSS Data And its application to the Nankai Subduction Zone

  Yutaro OKADA, Takuya NISHIMURA, Takao TABEI, Takeshi MATSUSHIMA, Hitoshi HIROSE

  Slow Earthquakes WS 2020 Virtual, Sep. 2020, English

  Oral presentation


• Slip distributions of short-term slow slip events in the northern Kii Peninsula based on NIED Hi-net tilt measurements

  Naoya Chujo, Hitoshi Hirose, Takeshi Kimura

  Slow Earthquakes WS 2020 Virtual, Sep. 2020, English

  Oral presentation


• An estimation of stress change during the Boso slow slip events based on earthquake swarm seismicity

  Tomoki Ukawa, Hitoshi Hirose

  Slow Earthquakes WS 2020 Virtual, Sep. 2020, Japanese

  Oral presentation


• Slow slip events in the afterslip area of the 1996 Hyuganada earthquakes, based on GNSS data

  Sawako Teshiba, Hitoshi Hirose

  Slow Earthquakes WS 2020 Virtual, Sep. 2020, Japanese

  Oral presentation


• Slip distributions of short-term slow slip events in Shikoku, southwest Japan from 2001 to 2019 based on tilt change measurements

  Hitoshi Hirose, Takeshi Kimura

  Slow Earthquakes WS 2020 Virtual, Sep. 2020, English

  Poster presentation


• An estimation of stress changes based on earthquake swarm seismicity accompanied by Boso slow slip events

  Tomoki Ukawa, Hitoshi Hirose

  JpGU - AGU Joint Meeting 2020: Virtual, Jul. 2020, English

  Poster presentation


• Spatiotemporal evolution of interplate slip in the Hyuganada and the Bungo Channel from 1996 to 2000 based on GNSS data

  Sawako Teshiba, Hitoshi Hirose

  JpGU - AGU Joint Meeting 2020: Virtual, Jul. 2020, English

  Poster presentation


• Slip distributions of short-term slow slip events in the northern Kii Peninsula based on NIED Hi-net tilt measurements

  Chujo Naoya, Hitoshi Hirose, Takeshi Kimura

  JpGU - AGU Joint Meeting 2020: Virtual, Jul. 2020, English

  Poster presentation


• Detection of short-term slow slip events and estimation of their duration by using three components of GNSS data in the Nankai subduction zone, southwest Japan

  Yutaro Okada, Takuya Nishimura, Takao Tabei, Takeshi Matsushima, Hitoshi Hirose

  JpGU - AGU Joint Meeting 2020: Virtual, Jul. 2020, English

  Poster presentation


• Slip distributions of short-term slow slip events in Shikoku, southwest Japan from 2001 to 2019 based on tilt change measurements

  Hitoshi Hirose, Takeshi Kimura

  スロー地震学 A01, A02 班合同オンライン研究会, Jun. 2020, Japanese

  Oral presentation


• Interplate slip around the Hyuganada-Bungo Channel from 1996 to 1998 based on GNSS data

  Sawako Teshiba, Hitoshi Hirose

  International Joint Workshop on Slow Earthquakes 2019, Sep. 2019, English, International conference

  Poster presentation


• Slip distributions of short-term slow slip events in the Shikoku area, southwest Japan from 2001 to 2019 based on tilt change measurements

  Hitoshi Hirose, Takeshi Kimura

  International Joint Workshop on Slow Earthquakes 2019, Sep. 2019, English, International conference

  Poster presentation


• The b-value of the earthquake swarm activities accompanied by the Boso slow slip events

  Yuki Noda, Hitoshi Hirose

  Japan Geoscience Union Meeting 2019, May 2019, English, Makuhari Messe, Chiba, International conference

  Poster presentation


• Cumulative slip distribution of short-term slow slip events in the western Shikoku area, southwest Japan based on tilt change measurements

  Hitoshi Hirose, Wakako Tamura, Takeshi Kimura

  Japan Geoscience Union Meeting 2019, May 2019, English, Makuhari Messe, Chiba, International conference

  Oral presentation


• Slip distributions based on tilt change data for short-term slow slip events in western Shikoku, southwest Japan

  Wakako Tamura, Takeshi Kimura, Hitoshi Hirose

  AGU Fall Meeting 2018, Dec. 2018, English, Washington, D.C., International conference

  Poster presentation


• A small slow slip event in Bungo Channel from December 2015 to March 2016 detected by a GNSS observation network

  Hitoshi Hirose, Takeshi Matsushima, Takao Tabei, Takuya Nishimura

  AGU Fall Meeting 2018, Dec. 2018, English, Washington, D.C., International conference

  Poster presentation


• 豊後水道 GNSS 観測網で捉えた 2015 年 12 月～ 2016 年 3 月頃の小規模なスロースリップイベント

  廣瀬 仁, 松島 健, 田部井 隆雄, 西村 卓也

  日本地震学会2018年度秋季大会, Oct. 2018, Japanese, ビッグパレットふくしま, Domestic conference

  Poster presentation


• Slip distributions based on tilt change data for short-term slow slip events in western Shikoku, southwest Japan

  Wakako Tamura, Takeshi Kimura, Hitoshi Hirose

  International Joint Workshop on Slow Earthquakes 2018, Sep. 2018, English, ACROS Fukuoka, International conference

  Poster presentation


• A small slow slip event in Bungo Channel from December 2015 to March 2016 detected by a GNSS observation network

  Hitoshi Hirose, Takeshi Matsushima, Takao Tabei, Takuya Nishimura

  International Joint Workshop on Slow Earthquakes 2018, Sep. 2018, English, ACROS Fukuoka, Kyushu, Japan, International conference

  Poster presentation


• Slip inversion based on tilt change data for short-term slow slip events in western Shikoku, southwest Japan

  Wakako Tamura, Hitoshi Hirose, Takeshi Kimura

  Japan Geoscience Union Meeting 2018, May 2018, English, Makuhari Messe, Chiba, International conference

  Oral presentation


• A comparison of the stress evolutions due to Boso slow slip events and the accompanying earthquake swarms

  Hitoshi Hirose, Kouta Nakano, Takanori Matsuzawa

  Japan Geoscience Union Meeting 2018, May 2018, English, Makuhari Messe, Chiba, International conference

  Poster presentation


• 地殻変動観測によるスロー地震

  HIROSE HITOSHI

  研究集会「スロー地震の物理4」, Mar. 2018, Japanese, Domestic conference

  Oral presentation


• スロー地震研究：地震学・測地学をまたぐ

  HIROSE HITOSHI

  研究集会「夢のある話を」, Mar. 2018, Japanese, 京都大学吉田キャンパス芝蘭会館山内ホール, Domestic conference

  Oral presentation


• A stress-constrained geodetic inversion method for spatiotemporal slip of a slow slip event with earthquake swarm

  TANAKA TAKU, HIROSE HITOSHI

  AGU Fall Meeting 2017, Dec. 2017, English, New Orleans, International conference

  Poster presentation


• 豊後水道水ノ子島での地震観測

  中東 和夫, 蔵下 英司, 松島 健, 手操 佳子, 宮町 凜太郎, 渡邉 早姫, HIROSE HITOSHI

  地震学会2017年度秋季大会, Oct. 2017, Japanese, かごしま県民交流センター, Domestic conference

  Poster presentation


• A stress-constrained geodetic inversion method for spatiotemporal slip of a slow slip event with earthquake swarm

  TANAKA TAKU, HIROSE HITOSHI

  Joint Workshop on Slow Earthquakes 2017, Sep. 2017, English, International conference

  Poster presentation


• A stress-constrained geodetic inversion method for spatiotemporal slip of a slow slip event with earthquake swarm

  田中 拓, HIROSE HITOSHI

  JpGU-AGU Joint Meeting 2017, May 2017, English, 幕張メッセ, International conference

  Poster presentation


• スロースリップイベントのすべり域制約のためのGNSS観測計画

  HIROSE HITOSHI, 宮崎真一, 松島健, 田部井隆雄, 山崎健一, 西村卓也

  新学術領域「スロー地震学」観測班集会, Jan. 2017, Japanese, 東京, Domestic conference

  Oral presentation


• Spatial variation in Earth structure inferred by GNSS seasonal deformations due to snow loads in northeast Japan

  KURISU Rie, HIROSE Hitoshi, NISHIMURA Takuya

  AGU Fall Meeting 2016, Dec. 2016, English, San Francisco, CA, USA, International conference

  Poster presentation


• A02 測地観測によるスロー地震の物理像の解明

  HIROSE HITOSHI, 宮崎真一, 松島健, 田部井隆雄, 山崎健一, 田中愛幸, 木村武志, 板場智史, 高木涼太, 西村卓也, 太田雄策, 矢来博司, 石川直史

  新学術領域「スロー地震学」キックオフミーティング in Joint Workshop on Slow Earthquakes 2016, Sep. 2016, Japanese, 東京, Domestic conference

  Oral presentation


• Interaction between slow earthquakes in and around Bungo channel, Nankai subduction zone

  OBARA Kazushige, TAKAGI Ryota, YAMASHITA Yusuke, ASANO Youichi, MATSUZAWA Takanori, TANAKA Sachiko, HIROSE Hitoshi, MAEDA Takuto

  日本地球惑星科学連合 2016年大会, May 2016, English, 千葉, International conference

  [Invited]

  Invited oral presentation


• GNSS年周地殻変動と積雪荷重の対比から見る地盤構造の地域性

  栗栖理恵, HIROSE HITOSHI, 西村卓也

  日本地球惑星科学連合 2016年大会, May 2016, Japanese, Domestic conference

  Poster presentation


• 新学術領域スロー地震学「測地観測によるスロー地震の物理像の解明」

  HIROSE HITOSHI

  京都大学防災研究所 拠点研究（一般推進研究）「南海トラフ巨大地震想定震源域南西端におけるプレート間固着状態の解明」キックオフミーティング, Apr. 2016, Japanese, 宮崎, Domestic conference

  Oral presentation


• Numerical modeling of slow slip events in Nankai and Cascadia, considering plate configuration and tremor distribution

  MATSUZAWA, Takanori, SHIBAZAKI, Bunichiro, OBARA, Kazushige, HIROSE, Hitoshi

  AGU Chapman Conference on the Slow Slip Phenomena, Feb. 2016, English, Ixtapa, Guerrero, Mexico, International conference

  Oral presentation


• Monitoring of Slow Earthquakes around Japan Islands and Numerical Modeling

  MATSUZAWA, Takanori, ASANO, Youichi, TANAKA, Sachiko, KIMURA, Takeshi, OBARA, Kazushige, MAEDA, Takuto, ITO, Yoshihiro, HIROSE, Hitoshi, SHIBAZAKI, Bunichiro

  The Seismological Society of Japan 2015 Fall Meeting, Oct. 2015, Japanese, Kobe International Conference Center, Domestic conference

  Invited oral presentation


• 2014-15 slow earthquake activity in Bungo Channel

  OBARA, Kazushige, TAKAGI, Ryota, ASANO, Youichi, MATSUZAWA, Takanori, TANAKA, Sachiko, HIROSE, Hitoshi, MAEDA, Takuto

  Joint Workshop on Slow Earthquakes 2015, Sep. 2015, English, Nagoya University, International conference

  Oral presentation


• Numerical modeling of slow slip events in the seismic cycles of megathrust earthquakes in southwestern Japan

  Takanori Matsuzawa, Bunichiro Shibazaki, Kazushige Obara, Hitoshi Hirose

  AGU Fall Meeting 2014, Dec. 2014, English, International conference

  Oral presentation


• Ambient Tremor Triggered by Long-term Slow Slip Event in Bungo Channel, Southwest Japan

  Kazushige Obara, Hitoshi Hirose, Takanori Matsuzawa, Sachiko Tanaka, Takuto Maeda

  AGU Fall Meeting 2014, Dec. 2014, English, International conference

  Poster presentation


• 2014 Boso Slow Slip Event: the Source Slip Process based on Tilt and GNSS Measurements

  Hitoshi Hirose, Takanori Matsuzawa, Takeshi Kimura, Hisanori Kimura

  AGU Fall Meeting 2014, Dec. 2014, English, International conference

  Poster presentation


• 南海トラフの大地震発生サイクル間におけるスロースリップイベントの数値シミュレーション

  松澤 孝紀, 芝崎 文一郎, 小原 一成, HIROSE HITOSHI

  日本地震学会2014年度秋季大会, Nov. 2014, Japanese, Domestic conference

  Poster presentation


• A Variation in the Recurrence interval of the Boso Peninsula Slow Slip Events, Central Japan

  Hitoshi Hirose, Takanori Matsuzawa

  2014 Geological Society of America Annual Meeting, Oct. 2014, English, Vancouver, Canada, International conference

  Oral presentation


• 豊後水道周辺域での「スロー地震」連動現象

  HIROSE HITOSHI

  海底地殻変動観測網構築に向けた検討会, Mar. 2014, Japanese, 東京大学地震研究所, Domestic conference

  Oral presentation


• Numerical modeling of interaction between shallow very low frequency earthquakes and deep slow slip events

  MATSUZAWA Takanori, SHIBAZAKI Bunichiro, OBARA Kazushige, HIROSE Hitoshi

  AGU Fall Meeting 2013, Dec. 2013, English, San Francisco, USA, International conference

  Poster presentation


• Implications of slow slip without tectonic tremor: insights from Kilauea (Hawaii) and Boso (Japan)

  MONTGOMERY-BROWN, Emily D, HIROSE Hitoshi

  AGU Fall Meeting 2013, Dec. 2013, English, San Francisco, USA, International conference

  [Invited]

  Invited oral presentation


• A comparison of the source processes of four Boso Peninsula slow slip events from 1996 to 2011 based on nearly homogeneous GNSS stations

  HIROSE Hitoshi, MATSUZAWA Takanori, KIMURA Takeshi

  AGU Fall Meeting 2013, Dec. 2013, English, San Francisco, USA, International conference

  Poster presentation


• 浅部超低周波地震と長期的・短期的スロースリップイベント発生の数値モデリング

  松澤 孝紀, 芝崎 文一郎, 小原 一成, HIROSE HITOSHI

  日本地震学会2013年秋季大会, Oct. 2013, Japanese, 横浜, Domestic conference

  Poster presentation


• 外部イベントによる応力変化が房総沖スロースリップの発生間隔に与える影響の定量的評価

  山崎 隆史, 佐藤 利典, 芝崎 文一郎, 橋間 昭徳, HIROSE HITOSHI

  日本地震学会2013年秋季大会, Oct. 2013, Japanese, 横浜, Domestic conference

  Poster presentation


• A comparison of the source processes of four Boso Peninsula slow slip events

  HIROSE Hitoshi, MATSUZAWA Takanori, KIMURA Takeshi

  Joint workshop on slow earthquakes (ERI workshop program "Study on occurrence mechanism of slow earthquakes: Toward resolving the relationship between slow earthquakes and megathrust huge earthquakes based on unification of results from observation, exper, Sep. 2013, English, Earthquake Research Institute, University of Tokyo, International conference

  Oral presentation


• 房総半島沖のスロースリップイベント -群発地震との関係、発生サイクルの変化-

  HIROSE Hitoshi, KIMURA Hisanori, ENESCU Bogdan, AOI Shin, KIMURA Takeshi, MATSUZAWA Takanori

  Joint Workshop on Slow Earthquakes, Mar. 2013, Japanese, 東京大学地震研究所, J-DESC, 東京, Domestic conference

  Oral presentation


• Tilt records prior to the 2011 off the Pacific coast of Tohoku Earthquake

  HIROSE Hitoshi

  French-Japanese Seminar on Earthquakes and Tsunamis, Nov. 2012, English, Ambassade de France au Japon, Tokyo, International conference

  Oral presentation


• 四国地域における微動発生と沈み込み形状を考慮した短期的・長期的スロースリップイベント発生挙動の数値モデリング

  MATSUZAWA Takanori, SHIBAZAKI Bunichiro, OBARA Kazushige, HIROSE Hitoshi

  日本地震学会2012年秋季大会, Oct. 2012, Japanese, 函館市, Domestic conference

  Poster presentation


• Hi-net高感度加速度計による傾斜変動データの潮汐応答成分の特徴と原位置キャリブレーション

  KIMURA Takeshi, HIROSE Hitoshi, MATSUMOTO Norio, KAMIGAICHI Osamu

  The Seismological Society of Japan Fall Meeting 2012, Oct. 2012, Japanese, 函館市, Domestic conference

  Poster presentation


• 2011年東北地方太平洋沖地震が房総半島スロースリップイベントを促進した可能性について

  HIROSE Hitoshi, KIMURA Hisanori, ENESCU Bogdan, AOI Shin

  The Seismological Society of Japan Fall Meeting 2012, Oct. 2012, Japanese, 日本地震学会, 函館市, Domestic conference

  Poster presentation


• 房総沖スロースリップのモデル化と東北地方太平洋沖地震がスロースリップに与えた影響

  YAMAZAKI Takafumi, SHIBAZAKI Bunichiro, SATO Toshinori, HASHIMA Akinori, HIROSE Hitoshi

  日本地球惑星科学連合2012年大会, May 2012, Japanese, 千葉市, Domestic conference

  Poster presentation


• フィリピン海スラブの走向方向に変化する短期的スロースリップイベントと深部低周波微動・超低周波地震

  KIMURA Takeshi, HIROSE Hitoshi, MATSUZAWA Takanori, KIMURA Hisanori, TANAKA Sachiko, OBARA Kazushige

  日本地球惑星科学連合2012年大会, May 2012, Japanese, 千葉市, Domestic conference

  Poster presentation


• 2011年房総半島スロースリップイベントのすべり過程と群発地震活動

  HIROSE Hitoshi, KIMURA Hisanori, KIMURA Takeshi, MATSUZAWA Takanori

  JpGU Meeting 2012, May 2012, Japanese, 日本地球惑星科学連合, 千葉市, Domestic conference

  Oral presentation


• 沈み込むプレートの傾斜方向に連動する3種のスロー地震

  HIROSE Hitoshi, ASANO Youichi, OBARA Kazushige, KIMURA Takeshi, MATSUZAWA Takanori, TANAKA Sachiko, MAEDA Takuto

  日本地球惑星科学連合2011年大会, May 2011, Japanese, 日本地球惑星科学連合, 千葉市, Domestic conference

  Oral presentation


• 2011年東北地方太平洋沖地震前の傾斜記録

  HIROSE Hitoshi

  日本地球惑星科学連合2011年大会, May 2011, Japanese, 日本地球惑星科学連合, 千葉市, Domestic conference

  Poster presentation

• Japan Geoscience Union

  Apr. 2005 - Present


• The Geodetic Society of Japan

  Apr. 2005 - Present


• American Geophysical Union

  Jan. 2000 - Present


• Seismological Society of Japan

  Apr. 1996 - Present

• Spatio-temporal multiscale modeling and forecast of slow and fast earthquakes

  松澤 孝紀, 堀 高峰, 井出 哲, 金子 善宏, 野田 朱美, 野村 俊一, 廣瀬 仁

  Japan Society for the Promotion of Science, Grants-in-Aid for Scientific Research Grant-in-Aid for Transformative Research Areas (A), Grant-in-Aid for Transformative Research Areas (A), National Research Institute for Earth Science and Disaster Prevention, 10 Sep. 2021 - 31 Mar. 2026


• Study for the interaction among slow earthquakes based on crustal deformation observation

  HIROSE Hitoshi

  Japan Society for the Promotion of Science, Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (C), Grant-in-Aid for Scientific Research (C), Kobe University, Apr. 2021 - Mar. 2024, Principal investigator

  地球上の様々なプレート沈み込み帯で発生しているスロー地震の発生メカニズムの理解、および、スロー地震間の相互作用を解明することを目的に研究を実施している。 豊後水道周辺域にて発生しているスロースリップイベント (SSE) による地殻変動を捉えるため、独自に設置したGNSS観測点の保守作業等を必要に応じて実施し、観測およびデータ収集を継続した。これまでの観測データを含めた長期間のデータに基づき、2018年から2019年にかけて豊後水道周辺にて発生した複数の SSE の、プレート境界断層でのすべりの時空間発展の推定に着手した。まずは、おおまかな規模や時空間的な位置関係を把握することを目的とし、既存のデータ解析手法を適用して解析を進めているところである。 また、防災科学技術研究所の Hi-net 傾斜記録に基づき、紀伊半島周辺において過去 20 年弱の間に発生した 70 を超える短期的 SSE のすべり分布を求めることに成功した。紀伊半島北部の伊勢湾や志摩半島周辺地域地下のプレート境界において、この活動が数 10 km スケールの活動単位におおまかに分かれること、また、それぞれの活動単位で発生間隔が数年の時間スケールで変化するなど長期的にみて特徴的な活動の消長があることがわかってきた。 これらの成果は、プレート境界でのすべり挙動の多様性、巨大地震間における地震発生準備過程や隣接領域との相互作用などを解明する上での重要な制約条件になるものである。


• 地殻変動観測に基づくスロー地震の相互作用の研究

  公益財団法人東京海上各務記念財団, 地震研究助成金, 神戸大学, Apr. 2019 - Mar. 2021, Principal investigator


• スロー地震学の国際展開

  Kazushige Obara, Hitoshi Hirose, Takahiro Hatano, Kohtaro Ujiie, Kimihiro Mochizuki, Satoshi Ide

  Japan Society for the Promotion of Science, Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research on Innovative Areas (Research in a proposed research area), Grant-in-Aid for Scientific Research on Innovative Areas (Research in a proposed research area), The University of Tokyo, Jun. 2016 - Mar. 2021, Coinvestigator

  平成30年9月21～23日に福岡県福岡市で国際研究集会を開催し、129名の参加者のうち13名の招待講演者を含む30名もの海外研究者の参加を得た。研究集会の招待講演者を講師とした特別セミナーならびにスロー地震カフェを、神戸大、九州大、広島大、防災科研、東大地震研で開催した。2019年度は9月に宮城県仙台市における開催を決定し、研究集会の発表形態を検討するとともに、招聘する海外研究者などの選考を開始した。JpGU2018に本領域が企画提案を行ったセッションに3名の海外研究者を招聘し、JpGU2019の同様のセッションにおいても海外研究者1名の招聘を決定した。 若手研究者海外派遣として、京都大学修士課程1年の井上智裕氏をRV Tangaroaの乗船を伴う共同研究のためニュージーランドに、東京大学修士課程2年の馬場慧氏をフランスIPGPに、同小澤創氏を米国スタンフォード大に、それぞれ1ヶ月間派遣した。2019年度前期の派遣者として、東北大博士課程1年寒河江皓大氏、東京工業大学修士1年土山絢子氏、九州大学修士2年福留泰平氏をそれぞれ米国UCサンタバーバラ校、同バークレー校）、スイスETHに派遣することを決定した。 JpGU2019、2019SSAなどの国際学会でスロー地震関連の特別セッションの提案を行った。 ニュースレター第3号の英語版を発行し、海外研究者に向けて本領域の研究活動に関する国際的周知を図り、平成30年4月にウィーンで開催されたEGU2018にて、ニュースレター第1号、2号を配布したとともに、翌年度のEGU2019 でもニュースレターを配布するための準備を行った。研究者以外の一般向けに本領域の国際的周知を図るため、リーフレット英語版を作成した。 2019年度10～11月にチリ大学で開催予定のチリ押しかけ研究集会の詳細検討をカウンターパートのチリ大学担当者と進めた。


• Science of slow earthquakes

  Kazushige Obara, Hitoshi Hirose, Takahiro Hatano, Kohtaro Ujiie, Kimihiro Mochizuki, Satoshi Ide

  Japan Society for the Promotion of Science, Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research on Innovative Areas (Research in a proposed research area), Grant-in-Aid for Scientific Research on Innovative Areas (Research in a proposed research area), The University of Tokyo, Jun. 2016 - Mar. 2021, Coinvestigator

  We succeeded in discovering a new type of slow earthquakes in the offshore area, which was difficult to observe until now, and in the frequency band that overlaps with microseism noise. We have reached the basic understanding that the slow earthquake is an "ultra-broad band phenomenon" that extends from the band of low frequency tremor to the band of slow slip event, and that "inhomogeneity" and "water" play important roles in its occurrence. In addition, in collaboration with geology, the geological reality of slow earthquakes has been clarified, and modeling has progressed to explain various characteristics of slow earthquakes.


• Study on physical mechanisms of slow earthquakes based on geodetic observations

  Hitoshi Hirose, Shinichi Miyazaki, Takeshi Matsushima, Takao Tabei, Kenichi Yamasaki, Yoshiyuki Tanaka, Ryota Takagi, Takeshi Kimura, Satoshi Itaba

  Japan Society for the Promotion of Science, Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research on Innovative Areas (Research in a proposed research area), Grant-in-Aid for Scientific Research on Innovative Areas (Research in a proposed research area), Kobe University, Jun. 2016 - Mar. 2021, Principal investigator

  スロースリップイベント (SSE) による地殻変動を詳細に把握するためのGNSS観測点整備を、四国地域、九州地域、沖縄本島周辺地域、八重山諸島周辺地域それぞれで進めた。四国1地点・九州7地点・沖縄本島周辺地域1地点・八重山諸島3地点にて連続観測を開始した。 豊後水道の長期的および短期的SSEのすべりの時間発展をGNSS時系列データから同時推定した。本研究で設置した観測点データを加えて西南日本の短期的SSEの検出を行った。四国西部から日向灘において、これまでに未報告のイベントを含めた長期的SSEを検出することに成功した。その結果、長期的SSEは4つのセグメントに分かれて活動しており、各セグメントにおいて周期的に発生していることが分かった。傾斜・歪データに含まれる背景ノイズ特性を評価し、ノイズレベルそのものやその時間変化から、各解析期間において使用するデータを自動選択するアルゴリズムを開発した。これにより本研究で開発した自動検出・解析手法の信頼性が向上した。歪・傾斜・地下水データを用いて短期的SSEの詳細なモニタリングとカタログ化を行い、「スロー地震データベース」への提供を開始した。陸上の歪データを用いて紀伊半島沖における浅部SSEを複数検出し、浅部微動との関係を調査した。 西南日本の陸上稠密GNSS観測点の変位速度より地殻ひずみ速度を算出し、プレートの沈み込みに伴う弾性圧縮変形および広域ブロック運動と、活断層や地質構造に起因する局所変動の分離を試みた。内陸のブロック運動を考慮した南海トラフ沿いのカップリング分布を推定し、スロー地震との対応を見出した。 重力観測の結果、東海地方の2回の長期的スロースリップ時に、既存のメカニズムでは説明できない重力減少が生じていることを発見した。物理班C02の鈴木氏と共同で構築した間隙流体移動モデルによって、観測結果を解釈しうることを示した。


• 地殻変動と地震活動に基づくスロースリップイベント像の解明

  廣瀬 仁

  学術研究助成基金助成金／基盤研究(C), Apr. 2016 - Mar. 2019, Principal investigator

  Competitive research funding


• 房総半島スロースリップイベントを鍵としたプレート間すべり特性の研究

  廣瀬 仁

  学術研究助成基金助成金／基盤研究(C), Apr. 2013 - Mar. 2016, Principal investigator

  Competitive research funding


• Study on slow earthquakes by detailed analysis of broadband observation

  IDE Satoshi, IMANISHI Kazutoshi, HIROSE Hitoshi, SHIOMI Katsuhiko

  Japan Society for the Promotion of Science, Grants-in-Aid for Scientific Research, Grant-in-Aid for Scientific Research (B), The University of Tokyo, 2008 - 2010

  To understand slow earthquakes recently discovered in world subduction zones, we observed and investigated broadband seismic data mainly in the Nankai subduction zone. We determined accurate location of tectonic tremor, revealed statistical properties of tremor and slow earthquakes, and presented a model in which tremor zones are formed through long-term plate motion. We also presented a new plate model of the Philippine Sea plate.


• ゆっくり地震の発生メカニズムから探る地震発生のダイナミクス

  廣瀬 仁

  日本学術振興会, 科学研究費助成事業, 特別研究員奨励費, 名古屋大学, 2001 - 2002

  GPS観測網で観測された「ゆっくり地震」を発生させる物理メカニズムを明らかにする目的で昨年度開発した、速度状態依存摩擦則を応用した地震発生シミュレーションの手法を、地震発生帯の走向方向の大きさ(H)が異なる様々なケースに適用し、すべり挙動の違いを調べた。 その結果、Hが傾斜方向の大きさ(W)と同程度の場合には、同じサイズの地震が規則的に発生する固有地震的挙動を示した。それに対してHがWよりも十分大きい場合には、地震サイズは一定にはならず、その頻度分布はGutenberg-Richter則に近い分布を示した。またすべり速度が地震時の5桁も遅いゆっくり地震(スロースリップイベント)も発生することが分かった。これらのすべりの多様性は応力の不均質分布によってもたらされうることが分かった。 これらの結果は2002年APEC地震シミュレーション国際協力会議、地球惑星科学関連学会2002年合同大会および日本地震学会2002年度秋期大会において発表した。またこれらの結果の一部をまとめた論文がGeophysical Research Letters誌に出版され、別の結果をまとめた論文をPure and Applied Geophysics誌に投稿した。上記学会参加のための旅費を研究費から支出した。また、以上の論文と学会発表を行うにあたって、国内外の研究者との研究打ち合わせを行ったが、そのための旅費も研究費によった。

• Slow earthquakes and great earthquakes

  Research Center for Urban Safety and Security, Kobe University

  Lecturer, 13 May 2023 - 13 May 2023


• 南海トラフ地震とスロー地震

  神戸市, 都市安全研究センター

  神戸防災のつどい2020: 安全・安心な社会を目指して－迫る自然災害の危険性とその対策－神戸大学都市安全研究センターの活動, 17 Jan. 2020 - 17 Jan. 2020


• GPSで地震を調べる

  JST, 広島大学附属高等学校, 神戸大学都市安全研究センター

  Lecturer, 広島大学附属高等学校SSH 先端科学研修, 13 Sep. 2019 - 13 Sep. 2019

• 神戸大学コラム「安心の素」no. 69: 臨時情報、防災確認の機会に

  Myself, 神戸新聞, 16 Sep. 2024

  Paper


• Detection of deep slow earthquakes with minute motions of the ground surface

  Other than myself, Grant-in-Aid for Scientific Research on Innovative Areas "Science of Slow Earthquakes", The Impact of Slow Earthquakes -Our current understanding-, Mar. 2022

  PR


• 神戸大学コラム「安心の素」no. 53: GPSで「断層ずれ」解明

  Myself, 神戸新聞, 26 Jul. 2021

  Paper


• 神戸大都市安全研究センター・コラム「安心の素」no. 1: 「スロー地震」は大地震の予兆?

  Myself, 神戸新聞, 16 Sep. 2013

  Paper

• International Joint Workshop on Slow Earthquakes 2021 プログラム委員

  International Joint Workshop on Slow Earthquakes 2021 プログラム委員

  新学術領域「スロー地震学」

  14 Sep. 2021 - 16 Sep. 2021

  Competition etc


• JpGU 2021 S-CG39 Science of slow earthquakes: Toward unified understandings of whole earthquake process セッションコンビーナ

  JpGU 2021 S-CG39 Science of slow earthquakes: Toward unified understandings of whole earthquake process セッションコンビーナ

  日本地球惑星科学連合

  30 May 2021 - 06 Jun. 2021

  Academic society etc