NDLI: Preseismic deformation in the seismogenic zone of the Lushan M $_{S}$7.0 earthquake detected by GPS observations

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Preseismic deformation in the seismogenic zone of the Lushan M $_{S}$7.0 earthquake detected by GPS observations

Content Provider	Springer Nature Link
Author	Liu, XiaoXia Wu, YanQiang Jiang, ZaiSen Zhan, Wei Li, Qiang Wei, WenXin Zou, ZhenYu
Copyright Year	2015
Abstract	A continuous GPS array across the southern segment of the Longmen Shan fault zone recorded the deformation during the process of the Lushan M $_{S}$7.0 earthquake that occurred on April 20, 2013. Such data can provide meaningful information regarding the dynamic evolution of crustal deformation in the seismogenic zone. Our studies have shown that the occurrence of the Wenchuan earthquake led to the loading of compressive and sinistral shearing strain on the southern segment of the Maoxian-Wenchuan fault, whereby the extrusion strain accumulated at a greater rate than before the Wenchuan earthquake. The strain time series in the seismogenic zone revealed that the principal compression strain rates decreased from west to east in the direction of N30°–45°W. Furthermore, the area to the east of Beichuan-Yingxiu fault behaved as a zone of compressive deformation with obvious sinistral shearing deformation. The surface strain and the first shearing strain time series decreased with time, while the area to the west of the Beichuan-Yingxiu fault behaved as a zone of dextral shear deformation that increased with time. Furthermore, the regional deformation field before the Lushan earthquake showed that the rate of extrusion strain accumulation in the southern segment of the Longmen Shan fault zone was obviously larger than before the Wenchuan earthquake. Moreover, the sinistral shearing strain accumulated in the area of the southern segment of the Maoxian-Wenchuan fault. Based on the above analysis, we consider that the eastward movement of the Bayan Har block increased considerably following the Wenchuan earthquake, which enhanced the accumulation of compression strain in the southern segment of the Longmen Shan fault zone.
Starting Page	1592
Ending Page	1601
Page Count	10
File Format	PDF
ISSN	16747313
Journal	Science in China Series D: Earth Sciences
Volume Number	58
Issue Number	9
e-ISSN	18691897
Language	English
Publisher	Science China Press
Publisher Date	2015-06-26
Publisher Place	Beijing
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Lushan M $_{S}$7.0 earthquake GPS observations GPS baseline time series strain time series Earth Sciences
Content Type	Text
Resource Type	Article
Subject	Earth and Planetary Sciences

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Preliminary results pertaining to coseismic displacement and preseismic strain accumulation of the Lushan M $_{S}$7.0 earthquake, as reflected by GPS surveying

Rupture process of the M $_{s}$ 7.0 Lushan earthquake determined by joint inversion of local static GPS records, strong motion data, and teleseismograms

Rupture process of the M $_{s}$7.0 Lushan earthquake, 2013

A more accurate relocation of the 2013 M $_{s}$7.0 Lushan, Sichuan, China, earthquake sequence, and the seismogenic structure analysis

Newmark displacement model for landslides induced by the 2013 Ms 7.0 Lushan earthquake, China

A rupture blank zone in middle south part of Longmenshan Faults: Effect after Lushan M $_{s}$7.0 earthquake of 20 April 2013 in Sichuan, China

Crustal and upper mantle structure and the deep seismogenic environment in the source regions of the Lushan earthquake and the Wenchuan earthquake

Erratum to: Newmark displacement model for landslides induced by the 2013 Ms 7.0 Lushan earthquake, China

The Lushan M $_{S}$7.0 earthquake and activity of the southern segment of the Longmenshan fault zone

Preseismic deformation in the seismogenic zone of the Lushan M $_{S}$7.0 earthquake detected by GPS observations

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Preliminary results pertaining to coseismic displacement and preseismic strain accumulation of the Lushan M $_{S}$7.0 earthquake, as reflected by GPS surveying

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