A preliminary study of seismogenic structure for the Xinyuan-Hejing, Xinjiang MS6.6 earthquake of June 30, 2012

Zhi Hai Li, Yong Zheng, Zu Jun Xie, Jian Ming Liu, Wen Ming Shangguan, Bin Shan

Research output: Contribution to journalArticleResearchpeer-review

Abstract

On June 30, 2012, an MS6.6 earthquake occurred at the border between Xinyuan and Hejing counties, Xinjiang Uygur Autonomous Region. It is the largest earthquake between the M7.1 Yushu, Qinghai Province event in 2010 and the M7.0 Lushan, Sichuan Province event in 2013.Based on seismic phase data of the earthquake sequence recorded by the Xinjiang Digital Seismic Network, we relocated the MS6.6 and its aftershocks by the absolute and relative location methods. The epicenter location of the mainshock is 43.429°N, 84.755°E, the focal depth is 21.8 km, and the aftershocks are distributed in NW direction. In terms of the waveforms of the M6.6 earthquake, we used the CAP method to make a grid search for the focal mechanism and the focal depth. The resulting focal mechanism solution includes 39°, 46°, 12° for the strike, dip, and rake angles on one plane and 301°, 81°, 135° on the other plane, respectively, and a focal depth of 21 km. So, the waveform inversion result is consistent with that by phase data. The strike and dip angles for the plane II of the focal mechanism solution are close to the Northern Edge fault of the Yili basin, and the relocated distribution of the aftershocks is also in agreement with the characteristics of the fault. Therefore, this fault should be the seismogenic structure of the Xinyuan-Hejing MS6.6 earthquake, which is of high angle and dip-slip in nature.

Translated title of the contributionA preliminary study of seismogenic structure for the Xinyuan-Hejing, Xinjiang MS6.6 earthquake of June 30, 2012
LanguageMandarin
Pages449-458
Number of pages10
JournalChinese Journal of Geophysics
Volume57
Issue number2
DOIs
Publication statusPublished - 2014
Externally publishedYes

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Earthquakes
earthquakes
earthquake
focal mechanism
aftershock
dip
waveforms
rakes
dip-slip fault
earthquake epicenter
borders
slip
grids
inversions
basin
method
province

Cite this

Li, Z. H., Zheng, Y., Xie, Z. J., Liu, J. M., Shangguan, W. M., & Shan, B. (2014). 2012年6月30日新疆新源—和静Ms6.6地震发震构造初步研究. Chinese Journal of Geophysics, 57(2), 449-458. https://doi.org/10.6038/cjg20140211
Li, Zhi Hai ; Zheng, Yong ; Xie, Zu Jun ; Liu, Jian Ming ; Shangguan, Wen Ming ; Shan, Bin. / 2012年6月30日新疆新源—和静Ms6.6地震发震构造初步研究. In: Chinese Journal of Geophysics. 2014 ; Vol. 57, No. 2. pp. 449-458.
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title = "2012年6月30日新疆新源—和静Ms6.6地震发震构造初步研究",
abstract = "On June 30, 2012, an MS6.6 earthquake occurred at the border between Xinyuan and Hejing counties, Xinjiang Uygur Autonomous Region. It is the largest earthquake between the M7.1 Yushu, Qinghai Province event in 2010 and the M7.0 Lushan, Sichuan Province event in 2013.Based on seismic phase data of the earthquake sequence recorded by the Xinjiang Digital Seismic Network, we relocated the MS6.6 and its aftershocks by the absolute and relative location methods. The epicenter location of the mainshock is 43.429°N, 84.755°E, the focal depth is 21.8 km, and the aftershocks are distributed in NW direction. In terms of the waveforms of the M6.6 earthquake, we used the CAP method to make a grid search for the focal mechanism and the focal depth. The resulting focal mechanism solution includes 39°, 46°, 12° for the strike, dip, and rake angles on one plane and 301°, 81°, 135° on the other plane, respectively, and a focal depth of 21 km. So, the waveform inversion result is consistent with that by phase data. The strike and dip angles for the plane II of the focal mechanism solution are close to the Northern Edge fault of the Yili basin, and the relocated distribution of the aftershocks is also in agreement with the characteristics of the fault. Therefore, this fault should be the seismogenic structure of the Xinyuan-Hejing MS6.6 earthquake, which is of high angle and dip-slip in nature.",
author = "Li, {Zhi Hai} and Yong Zheng and Xie, {Zu Jun} and Liu, {Jian Ming} and Shangguan, {Wen Ming} and Bin Shan",
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Li, ZH, Zheng, Y, Xie, ZJ, Liu, JM, Shangguan, WM & Shan, B 2014, '2012年6月30日新疆新源—和静Ms6.6地震发震构造初步研究', Chinese Journal of Geophysics, vol. 57, no. 2, pp. 449-458. https://doi.org/10.6038/cjg20140211

2012年6月30日新疆新源—和静Ms6.6地震发震构造初步研究. / Li, Zhi Hai; Zheng, Yong; Xie, Zu Jun; Liu, Jian Ming; Shangguan, Wen Ming; Shan, Bin.

In: Chinese Journal of Geophysics, Vol. 57, No. 2, 2014, p. 449-458.

Research output: Contribution to journalArticleResearchpeer-review

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AU - Liu, Jian Ming

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AU - Shan, Bin

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N2 - On June 30, 2012, an MS6.6 earthquake occurred at the border between Xinyuan and Hejing counties, Xinjiang Uygur Autonomous Region. It is the largest earthquake between the M7.1 Yushu, Qinghai Province event in 2010 and the M7.0 Lushan, Sichuan Province event in 2013.Based on seismic phase data of the earthquake sequence recorded by the Xinjiang Digital Seismic Network, we relocated the MS6.6 and its aftershocks by the absolute and relative location methods. The epicenter location of the mainshock is 43.429°N, 84.755°E, the focal depth is 21.8 km, and the aftershocks are distributed in NW direction. In terms of the waveforms of the M6.6 earthquake, we used the CAP method to make a grid search for the focal mechanism and the focal depth. The resulting focal mechanism solution includes 39°, 46°, 12° for the strike, dip, and rake angles on one plane and 301°, 81°, 135° on the other plane, respectively, and a focal depth of 21 km. So, the waveform inversion result is consistent with that by phase data. The strike and dip angles for the plane II of the focal mechanism solution are close to the Northern Edge fault of the Yili basin, and the relocated distribution of the aftershocks is also in agreement with the characteristics of the fault. Therefore, this fault should be the seismogenic structure of the Xinyuan-Hejing MS6.6 earthquake, which is of high angle and dip-slip in nature.

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