DOI: 10.1002/2014GL061199
论文题名: The preparatory phase of the 2009 Mw 6.3 L'Aquila earthquake by improving the detection capability of low-Magnitude foreshocks
作者: Sugan M. ; Kato A. ; Miyake H. ; Nakagawa S. ; Vuan A.
刊名: Geophysical Research Letters
ISSN: 0094-9826
EISSN: 1944-9557
出版年: 2014
卷: 41, 期: 17 起始页码: 6137
结束页码: 6144
语种: 英语
Scopus关键词: Matched filters
; Broad-band seismic stations
; Continuous waveforms
; Cumulative number
; Detection capability
; Filter techniques
; Foreshock sequences
; L'aquila earthquakes
; Spatial-temporal evolution
; Earthquakes
; detection method
; earthquake epicenter
; earthquake hypocenter
; earthquake magnitude
; earthquake rupture
; temporal evolution
; Aquila
英文摘要: We explored the detection capability of low-Magnitude earthquakes before the 6 April 2009 Mw 6.3 L'Aquila event by using a matched filter technique and 512 foreshocks as templates. We analyzed continuous waveforms from 10 broadband seismic stations in a 60 km radius from the epicenter and for ~3 months before the main shock. More than 3000 new events, mostly located on the main shock fault, were detected to define the spatial-Temporal evolution of micro-Seismicity. The foreshock sequence was active northwest of the Mw 6.3 hypocenter in January, then migrated toward it at a speed of ~0.5km/day in middle of February. At that time, in a ~4 km2 patch close to the main shock nucleation point, the cumulative number of earthquakes gradually increased until the Mw 6.3 event. Thispatch, characterized by a low b-Value, played a key role in controlling the preparation stage to the 2009 L'Aquila main rupture. © 2014. American Geophysical Union. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84907947803&doi=10.1002%2f2014GL061199&partnerID=40&md5=c1a74553faaed7c0e31287515990ab13
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/7090
Appears in Collections: 气候减缓与适应
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作者单位: OGS, Istituto Nazionale di Oceanografia e di Geofisica Sperimentale, Centro Ricerche Sismologiche, Udine, Italy
Recommended Citation:
Sugan M.,Kato A.,Miyake H.,et al. The preparatory phase of the 2009 Mw 6.3 L'Aquila earthquake by improving the detection capability of low-Magnitude foreshocks[J]. Geophysical Research Letters,2014-01-01,41(17).