Phenomenological Complexity of Earthquakes and Inherent Uncertainties in Fault Rupture
Project/Area Number |
18K13629
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Research Category |
Grant-in-Aid for Early-Career Scientists
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Allocation Type | Multi-year Fund |
Review Section |
Basic Section 17040:Solid earth sciences-related
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Research Institution | Tokyo Institute of Technology |
Principal Investigator |
Aso Naofumi 東京工業大学, 理学院, 助教 (70801223)
|
Project Period (FY) |
2018-04-01 – 2021-03-31
|
Project Status |
Completed (Fiscal Year 2020)
|
Budget Amount *help |
¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2019: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
Fiscal Year 2018: ¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000)
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Keywords | 地震 / 断層 / 不確定性 / 複雑性 |
Outline of Final Research Achievements |
For a given physics on the fault, we can calculate slip evolution deterministically. However, precise determination of microscopic heterogeneity is unrealistic, and therefore slip evolution appears to be a stochastic process. In this study, I tried to understand the complexity of earthquake phenomena based on my unique concept of inherent uncertainties in fault rupture. As a result, a simple model could explain a variety of earthquakes, from crack-like to pulse-like features, as well as slow earthquakes.
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Academic Significance and Societal Importance of the Research Achievements |
地震の物理的側面には未解決の問題が多く、例えば、大きな地震と小さな地震との根本的な違いでさえ、よく分かっていない。近年では、断層面がゆっくりと滑るスロー地震が巨大地震前に発生していることもわかっており、地震すべりの多様性を理解することは重要である。本研究の成果は、非常にシンプルなモデルながらも、断層破壊の多様性を再現する、世界で初めてのモデルである。
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Report
(4 results)
Research Products
(53 results)
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[Journal Article] Development of Slow Earthquake Database2018
Author(s)
Kano, M., N. Aso, S. Annoura, R. Arai, K. Chao, K. Heki, S. Itaba, Y. Ito, N. Kamaya, T. Maeda, J. Maury, M. Nakamura, T. Nishimura, K. Obana, H. Sugioka, R. Takagi, T. Takahashi, A. Takeo, Y. Tu, N. Uchida, Y. Yamashita, T. Matsuzawa, S. Ide and K. Obara
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Journal Title
Seismol. Res. Lett.
Volume: 89(4)
Issue: 4
Pages: 1566-1575
DOI
Related Report
Peer Reviewed / Open Access / Int'l Joint Research
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