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Featured researches published by Michiko Shigefuji.


Earth, Planets and Space | 2016

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

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

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.


Earth, Planets and Space | 2016

Strong ground motion in the Kathmandu Valley during the 2015 Gorkha, Nepal, earthquake

Nobuo Takai; Michiko Shigefuji; Sudhir Rajaure; Subeg Bijukchhen; Masayoshi Ichiyanagi; Megh Raj Dhital; Tsutomu Sasatani


Tectonophysics | 2017

Characterizing the Kathmandu Valley sediment response through strong motion recordings of the 2015 Gorkha earthquake sequence

Sudhir Rajaure; Domniki Asimaki; Eric M. Thompson; Susan E. Hough; Stacey S. Martin; Jean-Paul Ampuero; Megh Raj Dhital; Asaf Inbal; Nobuo Takai; Michiko Shigefuji; Subeg Bijukchhen; Masayoshi Ichiyanagi; Tsutomu Sasatani; Lalu Paudel


Earth, Planets and Space | 2016

Aftershock activity of the 2015 Gorkha, Nepal, earthquake determined using the Kathmandu strong motion seismographic array

Masayoshi Ichiyanagi; Nobuo Takai; Michiko Shigefuji; Subeg Bijukchhen; Tsutomu Sasatani; Sudhir Rajaure; Megh Raj Dhital; Hiroaki Takahashi


Journal of Japan Association for Earthquake Engineering | 2017

Estimation of S-Wave Velocity Structure Model by Joint Inversion of Site Amplification, Receiver Function and Phase Velocity of Rayleigh Wave

Hiroyuki Miura; Atsuko Matsuo; Tatsuo Kanno; Michiko Shigefuji; Tetsuo Abiru


Japan Geoscience Union | 2017

A Study on Characteristics of Long-Period Ground Motion in the Kathmandu Valley during the 2015 Gorkha Nepal earthquake aftershocks

Michiko Shigefuji; Nobuo Takai; Subeg Bijukchhen; Masayoshi Ichiyanagi; Tsutomu Sasatani


Japan Geoscience Union | 2017

Characteristics of Near Fault Strong Ground Motion in the Kathmandu Valley during the 2015 Gorkha Nepal earthquake

Nobuo Takai; Michiko Shigefuji; Subeg Bijukchhen; Masayoshi Ichiyanagi; Tsutomu Sasatani


Earthquake Spectra | 2017

Strong-motion characteristics and visual damage assessment around Seismic stations in Kathmandu after the 2015 Gorkha, Nepal, Earthquake

Subeg Bijukchhen; Nobuo Takai; Michiko Shigefuji; Masayoshi Ichiyanagi; Tsutomu Sasatani


Japan Geoscience Union | 2016

Integrated Geophysical surveys in levee excavation sites on the Chitose river, Central Hokkaido

Toru Mogi; Michiko Shigefuji; Nobuo Takai; Kenji Okazaki; Toshiyuki Kurahashi; Teruhiko Obinata; Jun Horita; Tomio Inazaki; Takaho Kita


Japan Geoscience Union | 2016

Characteristics of long-period motion in the Kathmandu Valley during the 2015 Gorkha Nepal earthquake sequence

Michiko Shigefuji; Nobuo Takai; Subeg Bijukchhen; Masayoshi Ichiyanagi; Tsutomu Sasatani

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