2015 Fiscal Year Final Research Report
Development and simultaneous determination of hypocenters and mechanisms of volcanic and non-volcanic tremors
| Project/Area Number |
25400448
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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 |
Solid earth and planetary physics
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| Research Institution | Kyoto University |
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Principal Investigator |
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| Project Period (FY) |
2013-04-01 – 2016-03-31
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| Keywords | 火山現象 / 火山性微動 / 爆発地震 / 震源 / 振幅分布 / リアルタイム / トリガー機能 / 共有メモリ |
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| Outline of Final Research Achievements |
We installed the real-time hypocenter determination system for volcanic earthquakes and tremor for Sakurajima. The system directory accesses the shared memory of seismic data and determines hypocenters. The detection method for the system uses time derivatives of root-mean-square amplitudes for two different time-length windows to detect volcanic earthquakes and tremors. The hypocenters of explosion earthquakes are located beneath an area around Showa crater at depths of -1 to 3 km below sea level. The hypocenters of earthquake swarm occurred in August 2015 are located beneath an area around Minamidake summit and Showa crater at depths of 2 to 8 km below sea level.
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| Free Research Field |
火山物理学
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