西-海-固地区垂直形变分析及地震趋势研究

Abstract

Abstract: By analyzing the evolution of vertical deformation field in Xiji-Haiyuan-Guyuan area,the following results are obtained: ① Since1990,the differential movement of vertical deformation field has decreased.Today,activity of Liupan mountain fault zone is low.② The compressional stress from Qinghai-Tibet sub-plate to the southwestern border of Ordos Massif along NE direction has become weak,but the compressional stress from North China sub-plate along SW direction becomes stronger.③ The reason why appears activity of small earthquakes,may be instability of horizontal stress field of Ordos block,due to adjustment of compressional stress form Qinghai-Tibet plate and relative strengthening of compressional stress from North China sub-plate.

Key words: Vertical crust deformation, Hai-Yuan fault zone, Seismicity, Xi-Hai-Gu area

CLC Number:

P315.72⁺5

ZHANG Si -xin, ZHANG Xi, CHEN Bing, XUE Fu-ping. Analysis of vertical crust deformation and study on the trend of earthquakes in Xiji-Haiyuan-Guyuan area[J]. EARTHQUAKE, 2000, 20(3): 48-52.

[1]	CHEN Han-lin, LIU Rui-feng, WANG Qin-cai. Seismic Activity, Focal Mechanism Solution and Stress Field in the Jinping Ⅰ Reservoir and Its Surrounding Area before and after Impoundment [J]. EARTHQUAKE, 2023, 43(3): 120-137.
[2]	WANG Hui, CAO Jian-ling, TIAN Qin-jian. Seismic Activity and Stress Migration between Major Earthquakes in Yutian Region, Xinjiang [J]. EARTHQUAKE, 2021, 41(2): 14-28.
[3]	ZHAO Ce, ZUO Ke-zhen, ZHAO Cui-ping. Seismicity Characteristics of the 17 June 2019 M_S6.0 Sichuan Changning Earthquake Sequence [J]. EARTHQUAKE, 2020, 40(3): 28-40.
[4]	WAN Sen-lin, ZHANG Jun-long, LIU Ming-jun, HE Wei-Min, LI Hai-long, GUO Chang-bao, LI Zhi-min. Seismogenic Structure and Seismic Activity Analysis of Minshan Block [J]. EARTHQUAKE, 2020, 40(2): 49-70.
[5]	YAN Kun, WANG Wei-jun, WANG Qiong, YANG Feng, LIU Ning, KOU Hua-dong. Discussion on the Seismicity and Seismogenic Structure in Fold-and-thrust Belt of Northern Tianshan Mountains [J]. EARTHQUAKE, 2019, 39(3): 43-60.
[6]	SUN Li-na, CHEN Ting, WANG Xiao-shan, JIN Xue-shen. Characteristics of Anomaly Evolution before Strong Earthquakes in Hebei [J]. EARTHQUAKE, 2019, 39(2): 147-158.
[7]	ZHANG Guo-min, YIN Xiao-fei, WANG Peng, SHAO Zhi-gang. Low Seismicity Anomaly and its Efficiency in Mid-term Earthquake Forecasting in Chinese Mainland [J]. EARTHQUAKE, 2019, 39(2): 1-10.
[8]	WU An-xu, CHEN Xue-zhong, LI Yan-e. Effect of the 2010 Maule Mw8.8 Earthquake on the Seismicity around its Rupture Zone [J]. EARTHQUAKE, 2019, 39(1): 146-154.
[9]	LI Chun-Hong, ZHAO Cui-Ping, ZHANG Na, ZHOU Lian-Qing. Seismic Background Characteristics in the Baihetan Reservoir Area [J]. EARTHQUAKE, 2018, 38(4): 94-108.
[10]	RUAN Xiang,HAN Jin,XIE Rong-hua,LONG Feng. Natural Background Seismicity of the Dagangshan Reservoir [J]. EARTHQUAKE, 2017, 37(3): 157-168.
[11]	LI Yan-e,CHEN Li-juan,CHEN Xue-zhong. Enhancement of Seismicity Recorded by the Qiaojia Seismic Network before the 2013 Lushan and 2014 Ludian Earthquakes [J]. EARTHQUAKE, 2017, 37(3): 95-106.
[12]	XIE Zhuo-juan,LU Yue-jun,FANG Yi,SHI Bing-xing. Relocated Seismicity and its Relation with Active Faults in Beijing—Tianjin—Hebei Area [J]. EARTHQUAKE, 2017, 37(3): 72-83.
[13]	LIU Yue, LU Xiao-jian, TIAN Qin-jian. Analysis of Seismicity Changes prior to Strong Earthquakes in Sichuan-Yunnan Region by the Region-Time-Length Algorithm [J]. EARTHQUAKE, 2016, 36(2): 94-104.
[14]	LIU Xue-qian, XUE Xiu-xiu, YANG Long-xiang, HE Xiang-ling, SU Li-hua, ZHENG Pei-ling. Time-frequency Analysis of Deformation and Gravity Data Observed in Henan Using S-Transform [J]. EARTHQUAKE, 2015, 35(4): 127-135.
[15]	PAN Ying, ZHANG Xiao-dong, FU Hong. Seismic Activity and Source Parameters in the Nuozhadu Reservoir Region, Yunna Province [J]. EARTHQUAKE, 2015, 35(3): 31-43.

Analysis of vertical crust deformation and study on the trend of earthquakes in Xiji-Haiyuan-Guyuan area

PDF (PC)

Knowledge

Abstract

Cite this article

share this article

References

Related Articles 15

Recommended Articles

Metrics

Comments