Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5780672 | Geodesy and Geodynamics | 2017 | 7 Pages |
Abstract
The April 25, 2015 Mw7.8 Nepal earthquake was successfully recorded by Crustal Movement Observation Network of China (CMONOC) and Nepal Geodetic Array (NGA). We processed the high-rate GPS data (1Â Hz and 5Â Hz) by using relative kinematic positioning and derived dynamic ground motions caused by this large earthquake. The dynamic displacements time series clearly indicated the displacement amplitude of each station was related to the rupture directivity. The stations which located in the direction of rupture propagation had larger displacement amplitudes than others. Also dynamic ground displacement exceeding 5Â cm was detected by the GPS station that was 2000Â km away from the epicenter. Permanent coseismic displacements were resolved from the near-field high-rate GPS stations with wavelet decomposition-reconstruction method and P-wave arrivals were also detected with S transform method. The results of this study can be used for earthquake rupture process and Earthquake Early Warning studies.
Keywords
Related Topics
Physical Sciences and Engineering
Earth and Planetary Sciences
Earth-Surface Processes
Authors
Yong Huang, Shaomin Yang, Xuejun Qiao, Mu Lin, Bin Zhao, Kai Tan,