Research on Velocity Structure and Aftershock Distribution of Shandong Rushan
Abstract Based on the array data of Rushan, using the double-difference accurate location method, this article clarifies the sequence distribution of aftershocks occurring in Rushan, Shandong Province, since May 2014. We then invert the three-dimensional velocity model with double-difference tomography method. The data reveals that the aftershocks in Rushan generally gather circularly with a predominance distribution of 3-8 km nearby; the aftershocks of Rushan earthquake swarms occur mainly in rupture-concentrated regions, with most at the depth of 5 km, which proves that Rushan earthquake swarms happened primarily at the upper crust. The P-wave velocity at different depths in the researched regions show dramatic changes. Because of the certain distance from the already-known main faults, it can be estimated that aftershock-concentrated regions are the branch fault of Rushan or a new buried fault here.
Key words :
Rushan
array
aftershock sequence
velocity structure
double-difference tomography
Cite this article:
LI Bo,ZHANG Zhengshuai,CUI Xin et al. Research on Velocity Structure and Aftershock Distribution of Shandong Rushan[J]. jgg, 2020, 40(9): 931-935.
LI Bo,ZHANG Zhengshuai,CUI Xin et al. Research on Velocity Structure and Aftershock Distribution of Shandong Rushan[J]. jgg, 2020, 40(9): 931-935.
URL:
http://www.jgg09.com/EN/ OR http://www.jgg09.com/EN/Y2020/V40/I9/931
[1]
ZHAO Linlin,YIN Xinxin,CAI Run, ZHANG Yuanfu. Three-Dimensional Body Wave Velocity Structure of Crustal Region in Ruoergai [J]. jgg, 2021, 41(5): 454-458.
[2]
ZHANG Zhibin, ZHAO Xiaocheng. Three-Dimensional Crustal Velocity Structure in the South Tianshan Mountains, Xinjiang :Results from Local Earthquake Tomography [J]. jgg, 2021, 41(3): 243-248.
[3]
CHEN Kai,YI Jiang,SUN Guodong,LI Guangke,WANG Tongjun. Research on 3D P-wave Velocity Structure Imaging in Chongqing Area [J]. jgg, 2020, 40(9): 936-941.
[4]
XU Kangsheng,ZENG Wenhao. Distribution Characteristics of Peak Velocity Ratio and Its Aftershocks on Two Strong Earthquakes
[J]. jgg, 2020, 40(5): 441-445.
[5]
ZHANG Zhengshuai,ZHENG Jianchang,ZHOU Chen, LI Xia,LI Guoyi. Fine Velocity Structure of the Maoshan Fault Zone and Adjacent Areas Revealed by Double-Difference Tomography
[J]. jgg, 2020, 40(5): 522-528.
[6]
YANG Fuping,YU Gangqun, HOU Linfeng,SUN Haiqing. Exploration of Deep Structural Characteristics of Taizhou-Changhua in Zhejiang Province [J]. jgg, 2019, 39(2): 142-147.
[7]
XU Zengbo,LIU Baojin,JI Jifa,FENG Shaoying,YUAN Hongke,TAN Yali,WANG Hongwei. Imaging for Shallow Velocity Structure and Buried Faultsin the Southern Margin of Taihang Mountains [J]. jgg, 2019, 39(1): 88-92.
[8]
HOU Linfeng,YAN Yunxiang,YANG Fuping, YU Gangqun,LI Linyuan. Research on Deep Crustal Structure in Shanxi Reservoir Area [J]. jgg, 2018, 38(8): 818-822.
[9]
DAI Qiang,WANG Fuyun,ZHAO Yanna. A Study of Crust-Mantle Transition Zone of Three Different Blocks in SSGT, BY-SG, YZB [J]. jgg, 2018, 38(7): 723-728.
[10]
DING Wenxiu,SHEN Xuelin,LIAO Wulin, ZHOU Wenyun,LI Yuan,WEI Guichun,CAO Zhengqi. S Wave Velocity of Qinling-Dabie Applied to the Zigui Earthquake Location [J]. jgg, 2018, 38(4): 351-355.
[11]
DENG Xiaoguo,WANG Fuyun,LIU Baofeng,FAN Zhenyu,WANG Shuaijun,ZHAO Jinren,ZHANG Janshi. Upper Crustal Velocity Structure of the Yibin-Jinchuan Profile and Its Implications [J]. jgg, 2018, 38(12): 1256-1261.
[12]
MIAO Qingjie,GAO Yuan,LIU Xiqiang,QU Junhao,ZHENG Jianchang. Tectonic Stress Analysis Based on the Crustal Seismic Anisotropy in Rushan Earthquake Near-Field Region [J]. jgg, 2017, 37(3): 234-239.
[13]
DENG Xiaojuan,FENG Shaoying,ZUO Ying,HE Yinjuan,JI Tongyu. Velocity Structure of the Shallow Part of the Profile Using Surface Wave of Reflection Seismic Data [J]. jgg, 2017, 37(3): 256-260.
[14]
DENG Xiaojuan,FENG Shaoying,ZUO Ying,HE Yinjuan,JI Tongyu . Inversion of the Love Wave in the SH Wave Reflection Seismic Data for the Shallow SH-Wave Velocity Structure [J]. jgg, 2017, 37(11): 1126-1130.
[15]
CAI Huiteng,JIN Xin,WANG Shanxiong. Establishment of Crust 1D Velocity Structure Based on Artificial
Earthquake Sounding Data [J]. jgg, 2015, 35(2): 267-272.