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Joint inversion of teleseismic, geodetic, and near-field waveform datasets for rupture process of the 2015 Gorkha, Nepal, earthquake

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タイトル: Joint inversion of teleseismic, geodetic, and near-field waveform datasets for rupture process of the 2015 Gorkha, Nepal, earthquake
著者: Kobayashi, Hiroaki 著作を一覧する
Koketsu, Kazuki 著作を一覧する
Miyake, Hiroe 著作を一覧する
Takai, Nobuo 著作を一覧する
Shigefuji, Michiko 著作を一覧する
Bhattarai, Mukunda 著作を一覧する
Sapkota, Soma Nath 著作を一覧する
キーワード: Rupture process
Gorkha earthquake
Coulomb failure function
発行日: 2016年 4月26日
出版者: Springer
誌名: Earth, Planets and Space
巻: 68
開始ページ: 1
終了ページ: 8
出版社 DOI: 10.1186/s40623-016-0441-1
抄録: The 2015 Gorkha earthquake and its aftershocks caused severe damage mostly in Nepal, while countries around the Himalayan region were warned for decades about large Himalayan earthquakes and the seismic vulnerability of these countries. However, the magnitude of the Gorkha earthquake was smaller than those of historical earthquakes in Nepal, and the most severe damage occurred in the north and northeast of Kathmandu. We explore reasons for these unexpected features by performing a joint source inversion of teleseismic, geodetic, and near-field waveform datasets to investigate the rupture process. Results indicate that the source fault was limited to the northern part of central Nepal and did not reach the Main Frontal Thrust. The zone of large slip was located in the north of Kathmandu, and the fault rupture propagated eastward with an almost constant velocity. Changes in the Coulomb failure function (ΔCFF) due to the Gorkha earthquake were computed, indicating that southern and western regions neighboring the source fault are potential source regions for future earthquakes related to the Gorkha earthquake. These two regions may correspond to the historical earthquakes of 1866 and 1344. Possible future earthquakes in the regions are predicted, and the warning for Himalayan seismic hazards remains high even after the Gorkha earthquake.
資料タイプ: article
URI: http://hdl.handle.net/2115/61396
出現コレクション:雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

提供者: 高井 伸雄

 

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