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Nishikawa, Tomoaki
Disaster Prevention Research Institute (DPRI) Associate Professor
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Last Updated :2026/03/28
Basic Information
Affiliated programs (koza)
Email Address
Email Address
nishikawa.tomoaki.2z
kyoto-u.ac.jp
Professional Memberships
Academic Degree
Research History
- From Apr. 2025, To PresentKyoto University, Disaster Prevention Research Institute, 准教授
- From Sep. 2021, To Mar. 2025The Institute of Statistical Mathematics, Visiting researcher
- From Apr. 2021, To Mar. 2025Kyoto University, Disaster Prevention Research Institute, 助教
- From Apr. 2018, To Mar. 2021Kyoto University, Disaster Prevention Research Institute, 日本学術振興会特別研究員 PD
- From Apr. 2015, To Mar. 2018The University of Tokyo, Graduate School of Science, 日本学術振興会特別研究員 DC1
Language of Instruction
ID,URL
ORCID ID
J-Global ID
Researcher number
10909443External link
Website(s) (URL(s))
researchmap URL
list
Last Updated :2026/03/28
Research
Research Topics, Overview of the research
Research Topics
Statistical seismology, slow earthquakeOverview of the research
A wide variety of slow fault-slip phenomena, called slow earthquakes, occur in subduction zones worldwide. These slow earthquakes sometimes trigger great earthquakes and earthquake swarms. I am working to improve probabilistic forecasts of seismicity by considering the effect of slow earthquakes on triggering seismicity. In addition, I am interested in the diversity of fast and slow seismicity in subduction zones worldwide and their origins. I am also interested in a wide range of research, not limited to slow earthquakes, as long as it contributes to improving seismicity forecasts.
Research Interests
Research Areas
Papers
- Inhomogeneous spatio-temporal epidemic-type aftershock sequence model incorporating seismicity-triggering slow slip eventsIsaías Bañales; Tomoaki Nishikawa; Yoshihiro Ito; Vladimir Kostoglodov; Ekaterina Kazachkina; José SantiagoScientific Reports, 29 Nov. 2025, Peer-reviewed
- Ongoing crustal deformation and earthquake swarm in the Noto Peninsula, central JapanTakuya Nishimura; Tomoaki Nishikawa; Daisuke Sato; Yoshihiro Hiramatu; Akihiro Sawada28 Mar. 2022
- Comparison of statistical low-frequency earthquake activity modelsTomoaki NishikawaEarth, Planets and Space, Apr. 2024, Peer-reviewed, Lead author, Corresponding author
- Author Correction: High probability of successive occurrence of Nankai megathrust earthquakes (Scientific Reports, (2023), 13, 1, (63), 10.1038/s41598-022-26455-w)Yo Fukushima; Tomoaki Nishikawa; Yasuyuki KanoScientific Reports, Dec. 2023
- Development of an Epidemic‐type Aftershock‐sequence Model Explicitly Incorporating the Seismicity‐triggering Effects of Slow Slip EventsTomoaki Nishikawa; Takuya NishimuraJournal of Geophysical Research: Solid Earth, 15 May 2023, Peer-reviewed
- High probability of successive occurrence of Nankai megathrust earthquakesYo Fukushima; Tomoaki Nishikawa; Yasuyuki KanoScientific Reports, 10 Jan. 2023, Peer-reviewed
- A review on slow earthquakes in the Japan TrenchTomoaki Nishikawa; Satoshi Ide; Takuya NishimuraProgress in Earth and Planetary Science, 03 Jan. 2023, Peer-reviewed, Invited
- 日本海溝沿いのスロー地震分布とそれに関する地殻構造論的・地質学的考察西川 友章月刊地球, Oct. 2022, Invited
- A cold seep triggered by a hot ridge subductionLucía Villar-Muñoz; Masataka Kinoshita; Joaquim P. Bento; Ivan Vargas-Cordero; Eduardo Contreras-Reyes; Umberta Tinivella; Michela Giustiniani; Natsue Abe; Ryo Anma; Yuji Orihashi; Hikaru Iwamori; Tomoaki Nishikawa; Eugenio Andres Veloso; Satoru HaraguchiScientific Reports, Oct. 2021, Peer-reviewed
- Earthquake Swarm Detection Along the Hikurangi Trench, New Zealand: Insights Into the Relationship Between Seismicity and Slow Slip EventsTomoaki Nishikawa; Takuya Nishimura; Yutaro OkadaJournal of Geophysical Research: Solid Earth, Apr. 2021, Peer-reviewed
- スロー地震多発領域が東北地震の破壊を止めた西川 友章地震ジャーナル, Dec. 2020, Invited
- Relationship of preseismic, coseismic, and postseismic fault ruptures of two large interplate aftershocks of the 2011 Tohoku earthquake with slow-earthquake activityHisahiko Kubo; Tomoaki NishikawaScientific Reports, Dec. 2020, Peer-reviewed
- The slow earthquake spectrum in the Japan Trench illuminated by the S-net seafloor observatoriesT. Nishikawa; T. Matsuzawa; K. Ohta; N. Uchida; T. Nishimura; S. IdeScience, 23 Aug. 2019, Peer-reviewed
- Recurring Slow Slip Events and Earthquake Nucleation in the Source Region of the M 7 Ibaraki-Oki Earthquakes Revealed by Earthquake Swarm and Foreshock ActivityTomoaki Nishikawa; Satoshi IdeJournal of Geophysical Research: Solid Earth, Sep. 2018, Peer-reviewed
- Detection of earthquake swarms at subduction zones globally: Insights into tectonic controls on swarm activityT. Nishikawa; S. IdeJournal of Geophysical Research: Solid Earth, Jul. 2017, Peer-reviewed
- Background seismicity rate at subduction zones linked to slab‐bending‐related hydrationTomoaki Nishikawa; Satoshi IdeGeophysical Research Letters, 16 Sep. 2015, Peer-reviewed
- Earthquake size distribution in subduction zones linked to slab buoyancyTomoaki Nishikawa; Satoshi IdeNature Geoscience, Dec. 2014, Peer-reviewed
Misc.
- スロー地震ってなんだ？西川 友章Japanese Scientists in Science 2019, Mar. 2020, Invited
- S-netが明らかにした東北沖のスロー地震分布西川 友章日本地震学会広報紙 なゐふる, Jan. 2020, Invited
Presentations
- 日本列島周辺の沈み込み帯で発生するスロー地震2025年度京都大学防災研究所公開講座, 13 Sep. 2025, Invited
- 沈み込み帯における地震とスロー地震の活動に関する統計地震学的研究西川友章日本地震学会2024年度秋季大会, 21 Oct. 2024, Invited
- 徹底解説 スロー地震西川友章阿武山地震・防災サイエンスミュージアム 新まんてんてらこや, 02 Jun. 2024, Invited
- 低周波地震活動統計モデルの比較 ー低周波地震活動発生メカニズムへの示唆ー西川友章日本地震学会2023年度秋季大会, 01 Nov. 2023
- Comparison of statistical seismicity models of low-frequency earthquakes (LFEs) and its implications for the mechanisms governing LFE activityTomoaki NishikawaSlow-to-Fast地震学国際合同研究集会2023, 15 Sep. 2023
- Comparison of statistical seismicity models of low-frequency earthquakes (LFEs) and its implications for the mechanisms governing LFE activityTomoaki NishikawaAGU Fall Meeting 2023, 11 Dec. 2023, Invited
- スロー地震活動を組み込んだ地震活動統計モデルの構築：ニュージーランド・ヒクランギ沈み込み帯への適用西川友章; 西村卓也2023年統計関連学会連合大会, 06 Sep. 2023, Invited
- Comparison and improvement of statistical models for activity of low-frequency earthquakesTomoaki NishikawaJapan Geoscience Union Meeting 2023, 24 May 2023
- Application of the ETAS model to slow earthquake research西川友章第85回統計地震学セミナー, 03 Oct. 2022, Invited
- すぐにわかるスロー地震ー日本海溝のスロー地震分布ー西川友章知の拠点【すぐわかアカデミア。】, 20 May 2022, 国立大学共同利用・共同研究拠点協議会 Youtubeチャンネル, Invited
- スロースリップイベントによる地震活動誘発効果を 陽に組み込んだETASモデルの開発西川 友章; 西村 卓也東大地震研共同利用研究集会「地震活動の統計モデルと物理的意味」, 08 Mar. 2022, Invited
- スロースリップイベントによる地震活動誘発効果を陽に組み込んだETASモデルの開発西川友章; 西村卓也日本地震学会2021年度秋季大会, 14 Oct. 2021, 日本地震学会
- 日本海溝海底地震津波観測網S-netが明らかにした日本海溝のスロー地震分布西川友章; 松澤孝紀; 太田和晃; 内田直希; 西村卓也; 井出哲日本地質学会2021年学術大会, 04 Sep. 2021, 日本地質学会, Invited
- The slow earthquake spectrum of the Japan Trench illuminated by the S-net seafloor observatoriesT. Nishikawa; T. Matsuzawa; K. Ohta; N. Uchida; T. Nishimura; S. IdeJapan Geoscience Union 2021 Meeting, 06 Jun. 2021, Japan Geoscience Union, Invited
- スロー地震ってなんだ？西川 友章サイエンス日本事務局 第2回 Science Cafe, 26 Jun. 2020, サイエンス日本事務局, Invited
Awards
- 日本地球惑星科学連合, Progress in Earth and Planetary Science The Most Cited Paper Awards 2025Official journal西川友章・井出哲・西村卓也
- 24 May 2024日本地球惑星科学連合, Progress in Earth and Planetary Science The Most Downloaded Paper Award 2024Official journal西川友章, 井出哲, 西村卓也Webページ: https://progearthplanetsci.org/awards_j/most-downloaded-2024.html
- 19 Mar. 2024日本地震学会, 2023年度日本地震学会論文賞
- 19 Mar. 2024日本地震学会, 2023年度日本地震学会若手学術奨励賞
- 24 Feb. 2021京都大学防災研究所, 研究発表講演会優秀発表賞
- 24 Mar. 2015東京大学 大学院理学系研究科, 研究奨励賞
- 10 Jul. 2017日本地球惑星科学連合, 学生優秀発表賞
- 29 Nov. 2013日本地震学会, 学生優秀発表賞
Media Coverage
- ［サイエンス Ｒｅｐｏｒｔ］東北沖合 昨年の地震活動 「スロー地震」前後で観測…揺れ感じぬ断層ずれ 前兆現象の可能性も読売新聞, Feb. 2026
- 緊急警告 千葉県沖、豊後水道 スロースリップ 地震が怖い講談社週刊現代, May 2024
- 【千葉で地震頻発】『スロースリップ』指摘される巨大地震との関係性とは？南海トラフ地震は？専門家「時期予測は難しいが規模の範囲が以前よりわかるように」解説毎日放送, よんチャンTV, Mar. 2024
- ［関東大震災１００年］教訓＜３＞予知は可能 見果てぬ夢読売新聞, Jun. 2023, Paper
- 南海トラフ巨大地震、続発は１週間以内に最大７７％ 他の地域より起きやすく産経新聞, Jan. 2023
- 南海トラフ東西どちらかでＭ８以上、１週間以内の連続発生の確率は１００倍以上読売新聞, Jan. 2023
- 南海トラフ地震後1週間、M8級連続の確率高く 東北大学日本経済新聞, Jan. 2023
- 南海トラフ地震後 1週間以内のM8級、発生率は100～3600倍毎日新聞, Jan. 2023
- 3.11から10年「地震学者たちが挑んだ“超巨大地震”」 アンコール放送NHK教育テレビ, サイエンスZERO, Mar. 2022
- 日曜特番 珠洲の群発地震北國新聞, Dec. 2021
- 3.11から10年「地震学者たちが挑んだ“超巨大地震”」NHK教育テレビ, サイエンスZERO, Mar. 2021
- 巨大地震のブレーキ役か。「スロー地震」の不思議NewsPicks, Aug. 2020
- スロー地震域 東日本大震災の断層破壊の拡大止める 京大チーム発表毎日新聞, Aug. 2019
- 東日本大震災の拡大止めた？ 断層のずれ多発の区域分析朝日新聞, Aug. 2019
- 「スロー地震」多発域、断層破壊防ぐ働き 東日本大震災で京大など確認産経新聞, Aug. 2019
- 新しいほど大地震発生＝プレート境界の沈み込み側－リスク評価に貢献・東大時事通信, Nov. 2014
External funds: Kakenhi
- Development of a new statistical seismicity model incorporating slow-earthquake activityGrant-in-Aid for Research Activity Start-up0204:Astronomy, earth and planetary science, and related fieldsKyoto UniversityTomoaki NishikawaFrom 30 Aug. 2021, To 31 Mar. 2023, Project Closedスロー地震;地震活動統計モデル;地震発生確率予測;沈み込み帯;スロースリップイベント;テクトニック微動
- Slow地震活動を予測・定量化する新たな統計モデルの構築Grant-in-Aid for Transformative Research Areas (A)Transformative Research Areas, Section (II)Kyoto University西川 友章From 16 Jun. 2022, To 31 Mar. 2024, Project Closedスロー地震;地震活動統計モデル;低周波地震;沈み込み帯;南海トラフ;日本海溝
- 日本全国陸海域での特異な地震活動の網羅的検出と非地震性過渡現象との因果関係の解明Grant-in-Aid for Early-Career ScientistsBasic Section 17040:Solid earth sciences-relatedKyoto University西川 友章From 01 Apr. 2024, To 31 Mar. 2027, Granted地震活動;群発地震;ETASモデル;非地震性過渡現象;スロースリップ;地殻流体;地震活動確率予測
list
Last Updated :2026/03/28
Education
Teaching subject(s)
- From 01 Apr. 2025, To 31 Mar. 2026Seminar on Crustal Movements A5152, Spring, Graduate School of Science, 2
- From 01 Apr. 2025, To 31 Mar. 2026Seminar on Crustal Movements B5153, Fall, Graduate School of Science, 2
- From 01 Apr. 2025, To 31 Mar. 2026Seminar on Seismology IV C5262, Spring, Graduate School of Science, 2
- From 01 Apr. 2025, To 31 Mar. 2026Seminar on Seismology IV B5261, Fall, Graduate School of Science, 2
- From 01 Apr. 2025, To 31 Mar. 2026Seminar on Seismology IV A5260, Spring, Graduate School of Science, 2
- From 01 Apr. 2025, To 31 Mar. 2026Advanced Seismology I: Earth Structure5269, Spring, Graduate School of Science, 2
- From 01 Apr. 2025, To 31 Mar. 2026Seminar on Seismology IV D5263, Fall, Graduate School of Science, 2
- From 01 Apr. 2025, To 31 Mar. 2026Seminar on Seismology IIIA5256, Spring, Graduate School of Science, 2
- From 01 Apr. 2025, To 31 Mar. 2026Seminar on Crustal Movements D5155, Fall, Graduate School of Science, 2
- From 01 Apr. 2025, To 31 Mar. 2026Seminar on Crustal Movements C5154, Spring, Graduate School of Science, 2
- From 01 Apr. 2025, To 31 Mar. 2026Seminar on Seismology III D5259, Fall, Graduate School of Science, 2
- From 01 Apr. 2025, To 31 Mar. 2026Seminar on Seismology IIIC5258, Spring, Graduate School of Science, 2
- From 01 Apr. 2025, To 31 Mar. 2026Seminar on Seismology IIIB5257, Fall, Graduate School of Science, 2
- From 01 Apr. 2024, To 31 Mar. 2025Seminar on Crustal Movements B5153, Fall, Graduate School of Science, 2
- From 01 Apr. 2024, To 31 Mar. 2025Seminar on Crustal Movements A5152, Spring, Graduate School of Science, 2
- From 01 Apr. 2024, To 31 Mar. 2025Seminar on Crustal Movements C5154, Spring, Graduate School of Science, 2
- From 01 Apr. 2024, To 31 Mar. 2025Seminar on Seismology IIIB5257, Fall, Graduate School of Science, 2
- From 01 Apr. 2024, To 31 Mar. 2025Seminar on Seismology IIIA5256, Spring, Graduate School of Science, 2
- From 01 Apr. 2024, To 31 Mar. 2025Seminar on Crustal Movements D5155, Fall, Graduate School of Science, 2
- From 01 Apr. 2024, To 31 Mar. 2025Seminar on Seismology III D5259, Fall, Graduate School of Science, 2
- From 01 Apr. 2024, To 31 Mar. 2025Seminar on Seismology IIIC5258, Spring, Graduate School of Science, 2
- From 01 Apr. 2023, To 31 Mar. 2024Seminar on Seismology III D5259, Fall, Graduate School of Science, 2
- From 01 Apr. 2023, To 31 Mar. 2024Seminar on Seismology IIIC5258, Spring, Graduate School of Science, 2
- From 01 Apr. 2023, To 31 Mar. 2024Seminar on Seismology IIIB5257, Fall, Graduate School of Science, 2
- From 01 Apr. 2023, To 31 Mar. 2024Seminar on Crustal Movements B5153, Fall, Graduate School of Science, 2
- From 01 Apr. 2023, To 31 Mar. 2024Seminar on Crustal Movements A5152, Spring, Graduate School of Science, 2
- From 01 Apr. 2023, To 31 Mar. 2024Seminar on Seismology IIIA5256, Spring, Graduate School of Science, 2
- From 01 Apr. 2023, To 31 Mar. 2024Seminar on Crustal Movements D5155, Fall, Graduate School of Science, 2
- From 01 Apr. 2023, To 31 Mar. 2024Seminar on Crustal Movements C5154, Spring, Graduate School of Science, 2
- From 01 Apr. 2022, To 31 Mar. 2023Seminar on Crustal Movements C5154, Spring, Graduate School of Science, 2
- From 01 Apr. 2022, To 31 Mar. 2023Seminar on Crustal Movements B5153, Fall, Graduate School of Science, 2
- From 01 Apr. 2022, To 31 Mar. 2023Seminar on Seismology IIIB5257, Fall, Graduate School of Science, 2
- From 01 Apr. 2022, To 31 Mar. 2023Seminar on Seismology IIIC5258, Spring, Graduate School of Science, 2
- From 01 Apr. 2022, To 31 Mar. 2023Seminar on Crustal Movements D5155, Fall, Graduate School of Science, 2
- From 01 Apr. 2022, To 31 Mar. 2023Seminar on Seismology III D5259, Fall, Graduate School of Science, 2
- From 01 Apr. 2022, To 31 Mar. 2023Seminar on Seismology IIIA5256, Spring, Graduate School of Science, 2
- From 01 Apr. 2022, To 31 Mar. 2023Seminar on Crustal Movements A5152, Spring, Graduate School of Science, 2
- From Apr. 2021, To Mar. 2022Seminar on Crustal Movements ASpring, 理学研究科
- From Apr. 2021, To Mar. 2022Seminar on Crustal Movements BFall, 理学研究科
- From Apr. 2021, To Mar. 2022Seminar on Crustal Movements CSpring, 理学研究科
- From Apr. 2021, To Mar. 2022Seminar on Crustal Movements DFall, 理学研究科
- From Apr. 2021, To Mar. 2022Seminar on Seismology IIIASpring, 理学研究科
- From Apr. 2021, To Mar. 2022Seminar on Seismology IIIBFall, 理学研究科
- From Apr. 2021, To Mar. 2022Seminar on Seismology IIICSpring, 理学研究科
- From Apr. 2021, To Mar. 2022Seminar on Seismology III DFall, 理学研究科
list
Last Updated :2026/03/28
Academic, Social Contribution
Academic Contribution
- 日本地震学会 学会誌「地震」編集委員Supervision (editorial), Peer review日本地震学会, From 01 Apr. 2025, To Present
- International Joint Workshop on Slow-to-Fast Earthquakes 2022Planning, management, etc., Other奈良春日野国際フォーラム甍, From 14 Sep. 2022, To 16 Sep. 2022
