1. Strong ground motion data of the 2015 Gorkha Nepal earthquake sequence in the Kathmandu Valley.
- Author
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Shigefuji, Michiko, Takai, Nobuo, Bijukchhen, Subeg, Ichiyanagi, Masayoshi, Rajaure, Sudhir, Dhital, Megh Raj, Paudel, Lalu Prasad, and Sasatani, Tsutomu
- Subjects
GROUND motion ,EARTHQUAKE aftershocks ,HAZARD mitigation ,NEPAL Earthquake, 2015 ,SEDIMENTARY structures ,EARTHQUAKE magnitude ,SEISMIC waves ,SEISMOGRAMS - Abstract
Strong-motion records of earthquakes are used not only to evaluate the source rupture process, seismic wave propagation and strong ground motion characteristics, but also to provide valuable data for earthquake disaster mitigation. The Kathmandu Valley, Nepal, which is characterised by having soft sediments that have been deposited in an earthquake-prone zone, has experienced numerous earthquakes. We have operated four strong-motion stations in the Kathmandu Valley since 2011. These stations recorded the 2015 magnitude 7.8 Gorkha Nepal earthquake that occurred in the Himalayan continental collision zone. For several months after the mainshock, we deployed four additional temporary stations. Here, we describe the seismic data for 18 earthquakes over magnitude 5.0 collected by this array, including the 2015 magnitude 7.3 Dolakha earthquake of maximum aftershock and three large aftershocks of magnitude 6-class. These data are essential for validating the sedimentary structure of the basin and for evaluating the hazard and risk of future earthquakes in the Kathmandu Valley. Measurement(s) Strong ground motion Technology Type(s) Accelerometer Sample Characteristic - Location Kathmandu Valley • Nepal [ABSTRACT FROM AUTHOR]
- Published
- 2022
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