DOI: 10.1002/2014GL061138
论文题名: Multiple slow-slip events during a foreshock sequence of the 2014 Iquique, Chile Mw 8.1 earthquake
作者: Kato A. ; Nakagawa S.
刊名: Geophysical Research Letters
ISSN: 0094-9866
EISSN: 1944-9597
出版年: 2014
卷: 41, 期: 15 起始页码: 5420
结束页码: 5427
语种: 英语
英文关键词: earthquake migrations
; foreshocks
; matched filter technique
; repeating earthquakes
; slow-slip events
; the 2014 Iquique Chile Mw 8.1 earthquake
Scopus关键词: Faulting
; Matched filters
; Earthquake migration
; Filter techniques
; foreshocks
; Repeating earthquake
; slow-slip events
; Earthquake catalogs
; Foreshock sequences
; Multiple sequences
; Nucleation points
; Plate boundaries
; Earthquakes
; earthquake event
; fault plane
; foreshock
; nucleation
; plate boundary
; seismogram
; slip rate
; stress field
; Chile
英文摘要: To obtain a precise record of the foreshock sequence before the 2014 Iquique, Chile Mw 8.1 earthquake, we applied a matched filter technique to continuous seismograms recorded near the source region. We newly detected about 10 times the number of seismic events listed in the routinely constructed earthquake catalog and identified multiple sequences of earthquake migrations at speeds of 2-10km/d, both along strike and downdip on the fault plane, updip of the main shock area. In addition, we found out repeating earthquakes from the newly detected events, likely indicating aseismic slip along the plate boundary fault during the foreshock sequence. These observations suggest the occurrence of multiple slow-slip events updip of the main shock area. The final slow-slip event migrated toward the main shock nucleation point. We interpret that several parts of the plate boundary fault perhaps experienced slow slip, causing stress loading on the prospective largest slip patch of the main shock rupture. Key Points Foreshocks migrated both along strike and downdip at rates of 2-10km/d Slow-slip events occurred updip of the largest slip patch of the main shock rupture Final slow-slip event migrated to the initiation point of the main shock rupture © 2014. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84905315815&doi=10.1002%2f2014GL061138&partnerID=40&md5=2ae6db41a1f17c5d22e5279e3f12bd7e
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/7130
Appears in Collections: 气候减缓与适应
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作者单位: Earthquake and Volcano Research Center, Graduate School of Environmental Studies, Nagoya University, Nagoya, Japan
Recommended Citation:
Kato A.,Nakagawa S.. Multiple slow-slip events during a foreshock sequence of the 2014 Iquique, Chile Mw 8.1 earthquake[J]. Geophysical Research Letters,2014-01-01,41(15).