2013 Fiscal Year Final Research Report
New approach based on the critical phenomena concept to assess the occurrence time of earthquakes
| Project/Area Number |
23510218
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Research Field |
Natural disaster science
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| Research Institution | The University of Tokyo |
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Principal Investigator |
UYEDA Seiya 東京大学, 地震研究所, 名誉教授 (60011459)
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| Co-Investigator(Kenkyū-buntansha) |
KAMOGAWA Masashi 東京学芸大学, 教育学部, 助教 (00329111)
UYESHIMA Makoto 東京大学, 地震研究所, 准教授 (70242154)
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| Project Period (FY) |
2011 – 2013
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| Keywords | 地震 / 臨界現象 / ナチュラルタイム |
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| Research Abstract |
It has recently been suggested that the approach of a system to critical state can be estimated by the Natural Time analysis of time series leading to a critical phenomenon. Natural Time is a new concept of time, which assumes that time proceeds only when an event occurs. Critical state can be recognized when a parameter called kappa1, that can be derived through the above analysis, converges to 0.07. In this study, approach to 0.07 was comparatively examined for various known critical phenomena. In investigating the statistical properties of kappa1, we found that its fluctuation in seismicity before the 2011 M9.0 off the Pacific coast of Tohoku Earthquake exhibited a remarkable variation.
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Research Products
(6 results)
