Relationship between crustal magnetic anomalies and strong earthquake activity in the south segment of the China North-South Seismic Belt
Relationship between crustal magnetic anomalies and strong earthquake activity in the south segment of the China North-South Seismic Belt
复制标题
中国南北地震带南段地壳磁异常与强震活动的关系
DOI：
10.1007/s11770-021-0870-x
复制
发表时间：
2021-09
影响因子：
0.7
通讯作者：
Gao Guoming
中科院分区：
文献类型：
--
作者：
Wen Limin;Kang Guofa;Bai Chunhua;Gao Guoming
中国南北地震带南段位于青藏高原东南缘。该地区是中国大陆地震活动频繁的地区。本文利用NGDC-720地磁场模型和大地热流资料，研究了南北地震带南段的地壳磁异常分布、居里面深度和地壳热结构特征。重点研究了1970年以来6级以上地震及其余震区的垂直分量ΔZ和磁偏角ΔD的分布特征，结果表明，地震主要发生在磁异常负区或强弱过渡带。它特别表现在ΔD上。研究区的居里表面变化很大，范围从20.8到31公里。居里面隆起区与大地热流高值区一致。高地热区与强震活动区相对应。大多数强震的震源深度都小于居里面的深度。强震主要发生在居里面的深浅过渡带。其结果可供该地区强震预报参考。
The south segment of the China North-South Seismic Belt is located in the southeast margin of the Qinghai Tibet Plateau. This region is characterized by the frequent seismic activity in Chinese mainland. In this paper, the geomagnetic field model NGDC-720 and the data of terrestrial heat flow are used to investigate the distribution of crustal magnetic anomalies, the depth of Curie surface, and the characteristics of the crustal thermal structure in the south segment of the North-South Seismic Belt. The distribution characteristics of the vertical component ΔZ and the magnetic declination ΔD in the area with earthquakes over a magnitude of 6 and their aftershocks since 1970 are focused on. The results show that the earthquakes are mainly observed in the area of negative magnetic anomaly or the strong and weak transition zone. It especially shows in the ΔD. The Curie surface in the study area varies significantly, ranging from 20.8 to 31 km. The uplift area of the Curie surface is consistent with the high-value area of terrestrial heat flow. The high geothermal area corresponds to the strong earthquake activity area. The focal depth of most strong earthquakes is shallower than the depth of the Curie surface. The strong earthquakes mainly occur in the deep-shallow transition zones of the Curie surface. The results can be used as a reference for strong earthquake prediction in this area.
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DOI：
10.5047/eps.2013.01.005
发表时间：
2013-09
期刊：
Earth, Planets and Space
影响因子：
--
作者：
I. Cho;Y. Kuwahara
通讯作者：
I. Cho;Y. Kuwahara
影响因子：
2.3
作者：
F. Speranza;L. Minelli;A. Pignatelli;M. Gilardi
通讯作者：
F. Speranza;L. Minelli;A. Pignatelli;M. Gilardi
影响因子：
2
作者：
N. Maden
通讯作者：
N. Maden
影响因子：
0.7
作者：
S. Sheng;Y. Wan;Chang-Sheng Jiang;Xiao-shan Wang;Shan-shan Liang;G. Xiao;Xiao-hui Hu
通讯作者：
S. Sheng;Y. Wan;Chang-Sheng Jiang;Xiao-shan Wang;Shan-shan Liang;G. Xiao;Xiao-hui Hu
影响因子：
5.8
作者：
Schoenbohm, Lindsay M.;Burchfiel, B. Clark;Chen Liangzhong
通讯作者：
Chen Liangzhong