DOI: 10.1002/grl.50601
论文题名: Coseismic offsets due to the 11 April 2012 Indian Ocean earthquakes (M w 8.6 and 8.2) derived from GPS measurements
作者: Yadav R.K. ; Kundu B. ; Gahalaut K. ; Catherine J. ; Gahalaut V.K. ; Ambikapthy A. ; Naidu M.S.
刊名: Geophysical Research Letters
ISSN: 0094-8811
EISSN: 1944-8542
出版年: 2013
卷: 40, 期: 13 起始页码: 3389
结束页码: 3393
语种: 英语
英文关键词: coseismic displacement
; GPS measurements
; Indian Ocean
; intraplate earthquake
Scopus关键词: Co-seismic displacement
; Earthquake epicenter
; GPS measurements
; Indian ocean
; Internal deformation
; Intraplate earthquakes
; Magnetic anomalies
; Strike-slip earthquakes
; Oceanography
; Earthquakes
; Australian plate
; coseismic process
; displacement
; earthquake epicenter
; earthquake event
; earthquake magnitude
; fault slip
; GNSS
; GPS
; Indian plate
; intraplate process
; magnetic anomaly
; plate boundary
; plate motion
; satellite data
; seismic wave
; strike-slip fault
; subduction zone
; swath bathymetry
; Andamans
; Andamans and Nicobars
; Great Nicobar
; India
; Indian Ocean
; Nicobars
英文摘要: The 11 April 2012 earthquake (Mw 8.6) in the Indian Ocean, about 100 km west off the Sumatra subduction zone, is the largest intraplate strike-slip earthquake in the known history. Two hours later, it triggered another great earthquake of Mw 8.2 in its vicinity. The earthquakes reflect the internal deformation of the diffused plate boundary between India and Australia caused by the differential plate motion between them. The slip occurred on conjugate planes, and the presence of some of them has been reported from the swath bathymetry and satellite magnetic anomalies. We estimate coseismic offsets due to these earthquakes at continuous GPS sites in the Andaman-Nicobar region and at other International GNSS Service (IGS) sites around the earthquakes source region. The sites on the Andaman Islands, which are about 900-1200 km to the north of the earthquake epicenters, experienced predominantly southward coseismic offset of up to 3 cm. The nearest site, Campbell Bay, on Great Nicobar Island, about 500 km to the north of the earthquake, documented an ESE offset of about 4 cm. The coseismic offsets are consistent with the finite-fault slip models derived from back projection of the seismic waves recorded by the global networks. Key Points Coseismic offsets from GPS due to M 8.6, 2012 earthquake in Indian ocean Coseismic offsets of about 2-4 cm in the Andaman Nicobar region Seismic back projection rupture model is consistent with the coseismic offsets ©2013. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84880765862&doi=10.1002%2fgrl.50601&partnerID=40&md5=d6a485ad29e81a8966bfb1ab586bbc8c
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/6075
Appears in Collections: 气候减缓与适应
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作者单位: CSIR-National Geophysical Research Institute, Hyderabad, 500007, India
Recommended Citation:
Yadav R.K.,Kundu B.,Gahalaut K.,et al. Coseismic offsets due to the 11 April 2012 Indian Ocean earthquakes (M w 8.6 and 8.2) derived from GPS measurements[J]. Geophysical Research Letters,2013-01-01,40(13).