DOI: 10.1002/2015GL063176
论文题名: Transient anomaly in fault zone-trapped waves during the preparatory phase of the 6 April 2009, Mw 6.3 L'Aquila earthquake
作者: Calderoni G. ; Rovelli A. ; Di Giovambattista R.
刊名: Geophysical Research Letters
ISSN: 0094-8885
EISSN: 1944-8616
出版年: 2015
卷: 42, 期: 6 起始页码: 1750
结束页码: 1757
语种: 英语
英文关键词: 2009 L'Aquila seismic sequence
; fault-trapped waves
; repeating earthquakes
; temporal changes
; velocity variations
; waveform coherence
Scopus关键词: Faulting
; Seismology
; Structural geology
; Water waves
; Repeating earthquake
; Seismic sequence
; Temporal change
; Velocity variations
; Wave forms
; Earthquakes
; amplitude
; fault zone
; foreshock
; seismology
; trapped wave
; wave velocity
; Aquila
英文摘要: Fault zone-trapped waves generated by repeating earthquakes of the 2009 L'Aquila seismic sequence show a sudden, up to 100% increase of spectral amplitudes 7days before the main shock. The jump occurs 10 to 20h after the ML 4.1, 30 March 2009 largest foreshock. The amplitude increase is accompanied by a loss of waveform coherence in the fault-trapped wave train. Other geophysical and seismological parameters are known to have shown a sudden change after the 30 March foreshock. The concomitance of a consistent change in the fault zone-trapped waves leads us to interpret our observation as due to a sudden temporal variation of the velocity contrast between the fault damage zone and hosting rocks in the focal volume. Fault zone-trapped waves thus provide a refined time resolution for changes occurring near the rupture nucleation, with the indication of a strong variation in 1day. Key Points Amplitudes of fault-trapped waves increase before the 2009 Mw 6.3 main shock The amplitude increase is concomitant with a loss of waveform coherence A finer temporal resolution is reached compared to other parameter changes ©2015. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84927786222&doi=10.1002%2f2015GL063176&partnerID=40&md5=e90d1314991abb1c1bb83cc9baee4d2d
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/8501
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: Istituto Nazionale di Geofisica e Vulcanologia, Rome, Italy
Recommended Citation:
Calderoni G.,Rovelli A.,Di Giovambattista R.. Transient anomaly in fault zone-trapped waves during the preparatory phase of the 6 April 2009, Mw 6.3 L'Aquila earthquake[J]. Geophysical Research Letters,2015-01-01,42(6).