Joint inversion of teleseismic, geodetic, and near-field waveform datasets for rupture process of the 2015 Gorkha, Nepal, earthquake 4. Seismology the 2015 Gorkha, Nepal, Earthquake

Hiroaki Kobayashi, Kazuki Koketsu, Hiroe Miyake, Nobuo Takai, Michiko Shigefuji, Mukunda Bhattarai, Soma Nath Sapkota

研究成果: Contribution to journalArticle査読

7 被引用数 (Scopus)

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.

本文言語英語
論文番号66
ジャーナルearth, planets and space
68
1
DOI
出版ステータス出版済み - 12 1 2016

All Science Journal Classification (ASJC) codes

  • 地質学
  • 宇宙惑星科学

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