Preliminary Investigation into Inversion of 2015 Mw7.8 Nepal Earthquake Based on GPS Data

被引：0
作者：
Xu R. [1 ]
Zhang R. [2 ]
Liao H. [1 ]
Gu T. [1 ]
Chen C. [1 ]
机构：
[1] Sichuan Earthquake Bureau, Chengdu
[2] China Earthquake Administration, Beijing
来源：
Xinan Jiaotong Daxue Xuebao/Journal of Southwest Jiaotong University | 2019年 / 54卷 / 02期
关键词：
High rate GPS; Inversion; Nepal earthquake; Real time; Seismic characteristics;
D O I：
10.3969/j.issn.0258-2724.20160860
中图分类号：
学科分类号：
摘要：
To explore the potential effect and advantage of near-field high rate GPS data on the real-time inversion of seismic characteristics of large earthquakes, 16 high rate GPS sites, affected by the 2015 Mw 7.8 Nepal earthquake, were utilized independently. The kinematic GPS data processing method, real-time moment tensor inversion algorithm, and trailing variance technique were used to replay the earthquake triggering, real-time centroid and moment tensor inversion, and ending judgement of the event. The problems found during the inversion and in the final results were discussed, and then compared to the GCMT, W-phase, and some already published results. The potential advantage of a GPS real-time displacement field in determining these parameters was explored. The GPS time series shows that, if rupture propagation is in one direction and is from west to southeast, the average speed is about 3.1 km/s and the duration of the event is at least 75 s. All these results are consistent with previously published findings. GPS derived centroid and moment magnitude values are consistent with GCMT and W-phase results and have high stability and reliability. © 2019, Editorial Department of Journal of Southwest Jiaotong University. All right reserved.
引用
收藏
页码：287 / 295
页数：8
相关论文
共 19 条
  • [1] Avouac J.P., Meng L.S., Wei S.J., Et al., Lower edge of locked Main Himalayan Thrust unzipped by the 2015 Gorkha earthquake, Nature Geoscience, 8, 9, pp. 45-58, (2015)
  • [2] Grandin R., Vallee M., Satriano C., Et al., Rupture process of the Mw=7.9 2015 Gorkha earthquake (Nepal): insights into Himalayan megathrust segmentation, Geophysical Research Letters, 42, 20, pp. 8373-8382, (2016)
  • [3] Galetzka J., Melgar D., Genrich J.F., Et al., Slip pulse and resonance of the Kathmandu basin during the 2015 Gorkha earthquake, Nepal, Science, 349, 6252, pp. 1091-1095, (2015)
  • [4] Liu G., Wang Q., Qiao X., Et al., The 25 April 2015 Nepal MS8.1 earthquake slip distribution from joint inversion of teleseismic, static and high-rate GPS data, Chinese Journal Geophysics, 58, 11, pp. 4287-4297, (2015)
  • [5] Shan X., Zhang G., Wang C., Et al., Joint inversion for the spatial fault slip distribution of the 2015 Nepal MW7.9 earthquake based on InSAR and GPS observations, Chinese Journal Geophysics, 58, 11, pp. 4266-4276, (2015)
  • [6] Zhang Y., Xu L., Chen Y., Rupture process of the 2015 Nepal Mw7.9 earthquake: fast inversion and preliminary joint inversion, Chinese Journal Geophysics, 58, 5, pp. 1804-1811, (2015)
  • [7] Zhang X., Xu L., Inversion of the apparent source time functions for the rupture process of the Nepal MS8.1 earthquake, Chinese Journal Geophysics, 58, 6, pp. 1881-1890, (2015)
  • [8] Liu Z., Gai Z., Rupturing process of the MW7.9 Nepal earthquake inverted by the multi-array compressive sensing method, Chinese Journal Geophysics, 58, 6, pp. 1891-1899, (2015)
  • [9] Duputel Z., Rivera L., Kanamori H., Et al., Real-time W phase inversion during the 2011 off the Pacific coast of Tohoku earthquake, Earth, Planets and Space, 63, 7, pp. 535-539, (2011)
  • [10] Bock Y., Melgar D., Brendan W.C., Et al., Replay of the 2011 Mw9.0 great east Japan earthquake in simulated real-time mode with integrated 1 Hz GPS and 100 Hz accelerometer data for rapid source characterization, earthquake response spectra and tsunami prediction, 2011 Great East Japan Earthquake, 4, 1, pp. 580-592, (2012)
12