2009 Fiscal Year Final Research Report
A study on the cascading rupture and co-rupture of asperities
| Project/Area Number |
19540437
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Solid earth and planetary physics
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| Research Institution | Tohoku University |
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Principal Investigator |
MATSUZAWA Toru Tohoku University, 大学院・理学研究科, 教授 (20190449)
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| Co-Investigator(Renkei-kenkyūsha) |
UCHIDA Naoki 東北大学, 大学院・理学研究科, 助教 (80374908)
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| Research Collaborator |
ARIYOSHI Keisuke 海洋研究開発機構, 地震津波・防災研究プロジェクト, 研究員 (20436075)
SHIMAMURA Kouhei 東北大学, 大学院・理学研究科
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| Project Period (FY) |
2007 – 2009
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| Keywords | 小繰り返し地震 / 準静的すべり / 地震の連鎖 / 固有地震 / アスペリティ |
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| Research Abstract |
We investigate the conditions for asperities to be ruptured one after another and find that the cascading rupture tends to occur when there are large stress fluctuations caused by large afterslip or slow-slip events, but it hardly occurs when the other asperity is located opposite to the rupture direction. Moreover, it is revealed that slip distributions of large events depend on the rupture histories of respective asperities.
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