2011 Fiscal Year Final Research Report
Understanding of slow and ordinary earthquakes in a single framework of modeling
| Project/Area Number |
21540429
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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 | The University of Tokyo |
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Principal Investigator |
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| Project Period (FY) |
2009 – 2011
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| Keywords | 地震現象 / 非線形系 |
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| Research Abstract |
We successfully simulate slow and ordinary earthquake in a single framework of modeling. It has become clear that key elements in the simulation are effects of fluid flow on fault slip and pore creation on the fault. We found that slower fault growth is obtained if we assume smaller permeabilities or larger pore creation rates. We also found that nonvolcanic tremor can be simulated if pore creation rate is large enough. Our calculation actually shows that fluid flow parallel to a fault must be assumed to simulate backward migration speeds of tremors on the order of 10-100km/h.
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