DOI: 10.1002/2015GL063953
论文题名: Investigating the final seismic swarm before the Iquique-Pisagua 2014 M<inf>w</inf> 8.1 by comparison of continuous GPS and seismic foreshock data
作者: Bedford J. ; Moreno M. ; Schurr B. ; Bartsch M. ; Oncken O.
刊名: Geophysical Research Letters
ISSN: 0094-9384
EISSN: 1944-9115
出版年: 2015
卷: 42, 期: 10 起始页码: 3820
结束页码: 3828
语种: 英语
英文关键词: aseismic
; earthquake
; foreshock
; slow slip
; subduction
; transient
Scopus关键词: Earthquakes
; Forecasting
; Plates (structural components)
; Transients
; Aseismic
; Foreshock
; Northern Chile
; Plate interfaces
; Seismic predictions
; Slow slip
; Subduction
; Surface motions
; Seismology
; comparative study
; dislocation
; displacement
; earthquake magnitude
; foreshock
; GPS
; seismic data
; seismograph
; slip
; subduction zone
; Chile
英文摘要: Preexisting networks of seismometers and continuous GPS in Northern Chile successfully captured surface motions and seismicity leading up to the 1 April Mw 8.1. Here we compare continuous GPS (cGPS) with predictions of seismic dislocations for the final foreshock swarm, beginning with the 16 March Mw 6.7. Results show that the cumulative cGPS motion can be largely explained by seismic slip because evolutions of cGPS positions for most stations stay within the ranges of seismic predictions (given sensible ranges of assumed source errors). However, cGPS motions between 18-21 and 25-31 March outpace seismic predictions, supporting the existence of aseismic transients that were most probably the afterslip from preceding bursts of seismicity. A parameter search reveals that the 16 March Mw 6.7 cGPS displacements can be recreated with a fault plane significantly rotated anticlockwise from the strike of the plate interface, suggesting that failure was on a structure other than the plate interface. ©2015. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84931569797&doi=10.1002%2f2015GL063953&partnerID=40&md5=51c8de9b867607bff3c826409e50c4bb
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/8999
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: Deutsches GeoForschungsZentrum, Telegrafenberg, Potsdam, Germany
Recommended Citation:
Bedford J.,Moreno M.,Schurr B.,et al. Investigating the final seismic swarm before the Iquique-Pisagua 2014 M<inf>w</inf> 8.1 by comparison of continuous GPS and seismic foreshock data[J]. Geophysical Research Letters,2015-01-01,42(10).