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

Research Project

Project/Area Number 21K03702
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 17040:Solid earth sciences-related
Research InstitutionKobe University

Principal Investigator

HIROSE Hitoshi  神戸大学, 都市安全研究センター, 准教授 (00465965)

Co-Investigator(Kenkyū-buntansha) 宮崎 真一  京都大学, 理学研究科, 教授 (00334285)
西村 卓也  京都大学, 防災研究所, 教授 (90370808)
Project Period (FY) 2021-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2023: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2022: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
Fiscal Year 2021: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Keywordsスロースリップイベント / 地殻変動 / 微動 / 沈み込み帯 / プレート間巨大地震 / 非地震性すべり / GNSS / 傾斜 / 沈み込みプレート境界 / すべり過程 / 南海トラフ巨大地震 / 機械学習 / プレート境界 / すべり領域 / 相互作用
Outline of Research at the Start

西日本では多種多様な「スロー地震」が発生している。スロー地震の特徴の一つに、種類の異なるスロー地震が時間的・空間的に近接して発生する場合があることが挙げられる。本研究では、独自のGNSS観測によって、スロー地震の中でも最も規模の大きい「スロースリップイベント」(SSE) による地殻変動を捉え、近接する場所で発生するSSEの活動領域が重なっているかどうかを確率的に評価することで、特にSSE間の連動性を研究する。

Outline of Final Research Achievements

To elucidate the generation mechanism of slow earthquakes occurring in various subduction zones on Earth and the interaction between slow earthquakes, we conducted research around the Bungo Channel region in southwestern Japan, where a variety of slow earthquakes occur. We integrated and analyzed data from our own GNSS observations and the Geospatial Information Authority of Japan's GNSS observation network to investigate the relationship between slow slip events (SSEs), the largest type of slow earthquake, and deep tremors. The results showed that tremors occur when SSE slip propagates to the tremor area. This is an important finding for understanding the mechanism of synchronous occurrence of different types of slow earthquakes.

Academic Significance and Societal Importance of the Research Achievements

異なるタイプのスロー地震の同期発生現象はいくつか知られているが、その発生メカニズムはあまり分かっていない。本研究は、その同期現象のうちの一つに、観測的な制約を与えるものである。プレート間断層の挙動は不明な点が多いが、一方で、その断層では南海トラフ地震のような巨大地震も発生することが危惧されている。このような研究の進展によって、プレート間地震の破壊伝播の範囲、言い換えると、地震の規模を支配する要因について手掛かりが得られることが期待される。

Report

(4 results)
  • 2023 Annual Research Report   Final Research Report ( PDF )
  • 2022 Research-status Report
  • 2021 Research-status Report
  • Research Products

    (22 results)

All 2024 2023 2022 2021 Other

All Journal Article (4 results) (of which Peer Reviewed: 2 results,  Open Access: 4 results) Presentation (16 results) (of which Int'l Joint Research: 7 results,  Invited: 1 results) Remarks (2 results)

  • [Journal Article] Long-term slow slip events with and without tremor activation in the Bungo Channel and Hyuganada, southwest Japan2023

    • Author(s)
      Hirose Hitoshi、Matsushima Takeshi、Tabei Takao、Nishimura Takuya
    • Journal Title

      Earth, Planets and Space

      Volume: 75 Issue: 1

    • DOI

      10.1186/s40623-023-01833-4

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] statsmodels を用いた GNSS 座標時系列データのスムージング2023

    • Author(s)
      廣瀬仁
    • Journal Title

      神戸大学都市安全研究センター研究報告

      Volume: 27 Pages: 1-8

    • Related Report
      2023 Annual Research Report
    • Open Access
  • [Journal Article] Development of a detection method for short-term slow slip events using GNSS data and its application to the Nankai subduction zone2022

    • Author(s)
      Okada Yutaro、Nishimura Takuya、Tabei Takao、Matsushima Takeshi、Hirose Hitoshi
    • Journal Title

      Earth, Planets and Space

      Volume: 74 Issue: 1

    • DOI

      10.1186/s40623-022-01576-8

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] 紀伊半島北部における短期的スロースリップイベントのすべり領域の傾斜データによる制約 -すべり領域と微動発生領域の空間的比較-2021

    • Author(s)
      副島庸平、廣瀬仁
    • Journal Title

      神戸大学都市安全研究センター研究報告

      Volume: 25 Pages: 9-21

    • Related Report
      2021 Research-status Report
    • Open Access
  • [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2024

    • Author(s)
      廣瀬仁,比嘉友香,藤井春水,木村武志
    • Organizer
      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
    • Related Report
      2023 Annual Research Report
  • [Presentation] 2011年東北地方太平洋沖地震直前の傾斜変動再訪: スタッキングによる検証2023

    • Author(s)
      廣瀬仁,加藤愛太郎,木村武志
    • Organizer
      日本地震学会2023年度秋季大会
    • Related Report
      2023 Annual Research Report
  • [Presentation] Development of a machine learning model to detect short-term SSEs from tilt records2023

    • Author(s)
      Tomoka Higa,Hitoshi Hirose,Takeshi Kimura
    • Organizer
      International Joint Workshop on Slow-to-Fast Earthquakes 2023
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Long-term slow slip events with and without tremor activation in the Bungo Channel and Hyuganada2023

    • Author(s)
      Hirose H,Matsushima T,Tabei T,Nishimura T
    • Organizer
      日本地球惑星科学連合2023年大会
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 傾斜データに基づく短期的スロースリップイベント検出のための機械学習手法の開発2023

    • Author(s)
      比嘉友香,廣瀬仁,木村武志
    • Organizer
      日本地球惑星科学連合2023年大会
    • Related Report
      2023 Annual Research Report
  • [Presentation] スロー地震の用語について: 測地学的見地から2023

    • Author(s)
      廣瀬仁
    • Organizer
      スロー地震に関する用語整頓のためのワークショップ,
    • Related Report
      2022 Research-status Report
    • Invited
  • [Presentation] Long-term slow slip events with and without tremor activation in the Bungo Channel and Hyuganada2023

    • Author(s)
      廣瀬仁, 松島健, 田部井隆雄, 西村卓也
    • Organizer
      学術変革領域「Slow-to-Fast地震学」B03班集会
    • Related Report
      2022 Research-status Report
  • [Presentation] Stress changes caused by Boso slow slip events inferred from seismicity data2022

    • Author(s)
      Ukawa T, Hirose H
    • Organizer
      JpGU Meeting 2022
    • Related Report
      2022 Research-status Report
    • Int'l Joint Research
  • [Presentation] Changes in long-term activity patterns of interplate slip from short-term slow slip events in the northern Kii Peninsula, Japan2022

    • Author(s)
      Chujo N, Hirose H, Kimura T
    • Organizer
      JpGU Meeting 2022
    • Related Report
      2022 Research-status Report
    • Int'l Joint Research
  • [Presentation] Periodic changes in activity pattern of short-term slow slip events in the northern Kii Peninsula, Japan2022

    • Author(s)
      Hirose H, Chujo N, Kimura T
    • Organizer
      International Joint Workshop on Slow-to-Fast Earthquakes 2022
    • Related Report
      2022 Research-status Report
    • Int'l Joint Research
  • [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)2021

    • Author(s)
      Naoya Chujo, Hitoshi Hirose, Takeshi Kimura
    • Organizer
      International Joint Workshop on Slow Earthquakes 2021
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research
  • [Presentation] Slow slip events in the Bungo Channel and Hyuganada areas from 2018 to 2019 detected by a GNSS observation network2021

    • Author(s)
      Hitoshi Hirose, Takeshi Matsushima, Takao Tabei, Takuya Nishimura
    • Organizer
      International Joint Workshop on Slow Earthquakes 2021
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research
  • [Presentation] A comparison of the source areas in Hyuganada among afterslip of two interplate earthquakes in 1996 and successive slow slip events2021

    • Author(s)
      Sawako Teshiba, Hitoshi Hirose
    • Organizer
      日本地球惑星科学連合2021年大会
    • Related Report
      2021 Research-status Report
  • [Presentation] Slow slip events in the Bungo Channel and Hyuganada areas from May 2018 to June 2019 detected by a GNSS observation network2021

    • Author(s)
      Hitoshi Hirose, Takeshi Matsushima, Takao Tabei, Takuya Nishimura
    • Organizer
      日本地球惑星科学連合2021年大会
    • Related Report
      2021 Research-status Report
  • [Presentation] Yutaro Okada, Takuya Nishimura, Takao Tabei, Takeshi Matsushima, Hitoshi Hirose2021

    • Author(s)
      Development of the detection method for short-term slow slip events using GNSS data and its application to the Nankai subduction zone
    • Organizer
      日本地球惑星科学連合2021年大会
    • Related Report
      2021 Research-status Report
  • [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 data2021

    • Author(s)
      Naoya Chujo, Hitoshi Hirose, Takeshi Kimura
    • Organizer
      日本地球惑星科学連合2021年大会
    • Related Report
      2021 Research-status Report
  • [Remarks] Hitoshi Hirose's Webpage

    • URL

      http://www2.kobe-u.ac.jp/~zhirose1/

    • Related Report
      2023 Annual Research Report 2022 Research-status Report
  • [Remarks] Hitoshi Hirose's webpage

    • URL

      http://www2.kobe-u.ac.jp/~zhirose1/

    • Related Report
      2021 Research-status Report

URL: 

Published: 2021-04-28   Modified: 2025-01-30  

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