Research Interests
Remote, Dynamic Triggering of Earthquake and Non-Volcanic Tremor
地震及び非火山性微動（深部低周波微動）の遠地誘発・動的誘発
Study on the triggering of small earthquakes, non-volcanic tremor, and volcanic tremor caused by the passage of seismic waves from distant large earthquakes. Such induced or triggered seismicity is often seen across Japan and these studies provide a better understanding of the mechanisms that cause earthquake and tremor occurrences.
遥か遠くで起きた大地震の地震波が日本列島を通過する時、小規模な地震や非火山性微動、火山性微動が誘発されることがある。どのようにして地震や微動が誘発されるのかを調べる事により、地震発生メカニズムの解明に迫っている。
(東北地方太平洋沖地震の場合)
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Waveforms band-pass-filtered at 2-16 Hz (top of each) show triggering of non-volcanic tremor, which was correlated with the large arriving surface waves (lower) in western Shikoku. (modified from Miyazawa, Brodsky and Mori, 2008)
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Application of Seismic Interferometry to Monitoring of Seismic Faults
地震波干渉法の地震断層モニタリングへの応用
Seismic Interferometry is a powerful method for retrieving seismic waves propagating between two seismic stations, by using only noise data. The purpose of this work is to find spatio-temporal changes of fault model parameters (e.g., at the Yamasaki Fault and plate interfaces).
地震波干渉法はノイズ記録のみから２点間を伝播する地震波を抽出することができる、極めて有用な手法である。本研究では、この手法を利用し（例えば、山崎断層やプレート境界の）断層パラメータの時空間変化を見いだすことを目的としている。
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The Yamasaki Fault is about 50 km long, strikes WNW--ESE, and consists of five left-lateral fault segments.
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Example of exracted P- and S-wave propagations from noise data by using the seismic interferometry. (modified from Miyazawa, Snieder and Venkataraman, 2008)
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Others
その他
Other interests include non-volcanic tremor, aftershocks, seismic hazard, seismic wave scattering.
非火山性微動、余震活動、地震ハザード、地震波散乱
See my publication lists in detail.
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