|本期目录/Table of Contents|

[1]陈政宇,倪 喆,周思远,等.基于亚失稳理论分析2021年云南漾濞MS6.4地震前岩石圈磁场变化特征[J].地震研究,2021,44(03):391-398.
　CHENG Zhengyu,NI Zhe,ZHOU Siyuan,et al.Analysis Based on the Meta-instability Theory of the Variation Characteristics of the Lithospheric Magnetic Field in Yunnan before the 2021 Yangbi,Yunnan MS6.4 Earthquake[J].Journal of Seismological Research,2021,44(03):391-398.
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基于亚失稳理论分析2021年云南漾濞MS6.4地震前岩石圈磁场变化特征(PDF/HTML)

《地震研究》[ISSN:1000-0666/CN:53-1062/P]

卷:
44
期数:
2021年03期
页码:
391-398
栏目:
出版日期:
2021-10-20

文章信息/Info

Title:
Analysis Based on the Meta-instability Theory of the Variation Characteristics of the Lithospheric Magnetic Field in Yunnan before the 2021 Yangbi,Yunnan MS6.4 Earthquake
作者:
陈政宇1; 倪 喆1; 周思远1; 王振东2; 王 粲2; 赵育飞1
(1.云南省地震局,云南 昆明 650224; 2.中国地震局地球物理研究所,北京 100081)
Author(s):
CHENG Zhengyu1; NI Zhe1; ZHOU Siyuan1; WANG Zhendong2; WANG Can2; ZHAO Yufei1
(1.Yunnan Earthquake Agency,Kunming 650224,Yunnan,China)(2.Institute of Geophysics,China Earthquake Administration,Beijing 100081,China)
关键词:
漾濞MS6.4地震;  岩石圈磁场;  水平矢量;  亚失稳理论
Keywords:
the Yangbi MS6.4 earthquake;  lithospheric magnetic field;  horizontal vector;  the meta-instability theory
分类号:
P318.5
DOI:
-
摘要:
回溯2021年云南漾濞MS6.4地震前2017—2021年云南地区岩石圈磁场水平矢量逐年变化的空间分布特征,并与亚失稳理论中稳态-亚稳态-亚失稳态-失稳态的各阶段进程进行对比分析。结果表明:漾濞地震前,在震中及其附近区域出现的岩石圈磁场水平矢量弱变现象是震前的典型特征,其“弱变区域”的形成对应亚失稳O点,是野外观测当中最易识别的重要标识; 漾濞地震前连续4期弱变区域存在有“重叠”区域,同时其外围水平矢量量级增大且方向改变,则是进入到了“不可逆”的亚失稳OB阶段,预示着地震将要发生且震中在“重叠”区域的边缘,利用这种时空变化特征可以提前预判发震地点与时间。此外,该分析也是将亚失稳研究从室内实验走向野外观测的有益尝试。
Abstract:
The purpose of this paper is to explain the annual variation characteristics of the lithospheric magnetic field before the Yangbi MS6.4 earthquake with the meta-instability theory.The spatial distribution characteristics year by year of the horizontal vector of lithospheric magnetic field in Yunnan province from 2017 to 2021 before the Yangbi MS6.4 earthquake is reviewed and compared with the process of steady state-met-astable state-meta-instability state-instability state.The results show that the weakening region of the horizontal vector in the meta-instability O stage is the most easily recognized typical mark in field observation; There are “overlapping” zones in the weakening region for two consecutive periods or more,and the outer horizontal vector increase and change their direction.These mark the “irreversible” meta-instability OB stage,which indicates that the earthquake will occur at the edge of the “overlapping” region.It is a meaningful attempt to change the study of meta-instability theory from laboratory to field observation in addition.

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备注/Memo

备注/Memo:
收稿日期:2021-07-01
基金项目:国家重点研发计划(2018YFC150330504)、云南省地震局科技专项(地磁异常与地震活动关系的深入分析)和云南省地震局地震地磁分析与地震预报创新团队联合资助.

更新日期/Last Update: 2021-10-20