DOI: 10.1002/2015GL064278
论文题名: Earthquake magnitude calculation without saturation from the scaling of peak ground displacement
作者: Melgar D. ; Crowell B.W. ; Geng J. ; Allen R.M. ; Bock Y. ; Riquelme S. ; Hill E.M. ; Protti M. ; Ganas A.
刊名: Geophysical Research Letters
ISSN: 0094-9370
EISSN: 1944-9101
出版年: 2015
卷: 42, 期: 13 起始页码: 5197
结束页码: 5205
语种: 英语
英文关键词: GPS
; ground motion
; source scaling
; tsunami warning
Scopus关键词: Geophysics
; Global positioning system
; Seismic waves
; Seismology
; Tsunamis
; Earthquake early warning
; Earthquake magnitudes
; Earthquake source models
; Ground motions
; Magnitude estimation
; Peak ground displacement
; source scaling
; Tsunami warning
; Earthquakes
; displacement
; early warning system
; earthquake magnitude
; GPS
; ground motion
; P-wave
; peak acceleration
; real time
; tilt
; tsunami
; waveform analysis
英文摘要: GPS instruments are noninertial and directly measure displacements with respect to a global reference frame, while inertial sensors are affected by systematic offsets - primarily tilting - that adversely impact integration to displacement. We study the magnitude scaling properties of peak ground displacement (PGD) from high-rate GPS networks at near-source to regional distances (∼10-1000 km), from earthquakes between Mw 6 and 9. We conclude that real-time GPS seismic waveforms can be used to rapidly determine magnitude, typically within the first minute of rupture initiation and in many cases before the rupture is complete. While slower than earthquake early warning methods that rely on the first few seconds of P wave arrival, our approach does not suffer from the saturation effects experienced with seismic sensors at large magnitudes. Rapid magnitude estimation is useful for generating rapid earthquake source models, tsunami prediction, and ground motion studies that require accurate information on long-period displacements. Key Points PGD scales with earthquake magnitude PGD can provide rapid unsaturated magnitude PGD observations are best made with GPS. © 2015. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84938125216&doi=10.1002%2f2015GL064278&partnerID=40&md5=1d5b8d8a04ab7296a11e992ada78ecf2
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/8985
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: Seismological Laboratory, University of California, Berkeley, CA, United States
Recommended Citation:
Melgar D.,Crowell B.W.,Geng J.,et al. Earthquake magnitude calculation without saturation from the scaling of peak ground displacement[J]. Geophysical Research Letters,2015-01-01,42(13).