DOI: 10.1002/2015GL067044
论文题名: Real-time capture of seismic waves using high-rate multi-GNSS observations: Application to the 2015 Mw 7.8 Nepal earthquake
作者: Geng T. ; Xie X. ; Fang R. ; Su X. ; Zhao Q. ; Liu G. ; Li H. ; Shi C. ; Liu J.
刊名: Geophysical Research Letters
ISSN: 0094-9483
EISSN: 1944-9214
出版年: 2016
卷: 43, 期: 1 起始页码: 161
结束页码: 167
语种: 英语
英文关键词: BDS
; Nepal earthquake
; PPP
; seismic waves
; variometric approach
Scopus关键词: Geophysics
; Seismic waves
; Seismology
; BDS
; Earthquake early warning
; Gps precise point positioning
; PPP
; Strong ground motion
; Strong motion datum
; Variometric approach
; Velocity estimation
; Earthquakes
; accuracy assessment
; BDS
; displacement
; early warning system
; earthquake event
; earthquake magnitude
; GNSS
; ground motion
; positioning system
; precision
; real time
; seismic wave
; tsunami
; variance analysis
; velocity profile
; waveform analysis
英文摘要: The variometric approach is investigated to measure real-time seismic waves induced by the 2015 Mw 7.8 Nepal earthquake with high-rate multi-GNSS observations, especially with the contribution of newly available BDS. The velocity estimation using GPS + BDS shows an additional improvement of around 20% with respect to GPS-only solutions. We also reconstruct displacements by integrating GNSS-derived velocities after a linear trend removal (IGV). The displacement waveforms with accuracy of better than 5 cm are derived when postprocessed GPS precise point positioning results are used as ground truth, even if those stations have strong ground motions and static offsets of up to 1-2 m. GNSS-derived velocity and displacement waveforms with the variometric approach are in good agreement with results from strong motion data. We therefore conclude that it is feasible to capture real-time seismic waves with multi-GNSS observations using the IGV-enhanced variometric approach, which has critical implications for earthquake early warning, tsunami forecasting, and rapid hazard assessment. © 2015. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84957727661&doi=10.1002%2f2015GL067044&partnerID=40&md5=4a503a0d12a62f1ac36c88ef27d18677
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/10446
Appears in Collections: 科学计划与规划 气候变化与战略
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作者单位: GNSS Research Center, Wuhan University, Wuhan, China
Recommended Citation:
Geng T.,Xie X.,Fang R.,et al. Real-time capture of seismic waves using high-rate multi-GNSS observations: Application to the 2015 Mw 7.8 Nepal earthquake[J]. Geophysical Research Letters,2016-01-01,43(1).