苏金波^1,3,,
刘敏^2,,,
张云鹏¹,
王伟涛¹,
李红谊²,
杨军⁴,
李孝宾⁴,
张淼⁵
1. 中国地震局地球物理研究所, 北京 100081
2. 中国地质大学(北京), 北京 100083
3. 中国地震局乌鲁木齐中亚地震研究所, 乌鲁木齐 830011
4. 中国地震科学实验场大理分中心, 云南大理 671000
5. Dalhousie University, Halifax, B3H 4R2, Canada

基金项目: 国家重点研发项目（2018YFC1503200），国家自然基金（41874063），地震科技星火计划课题（XH21041Y），新疆地震科学基金（202003，202120）和上海佘山地球物理野外科学观测研究站（2020K02），中国地震局地球物理研究所基本业务经费（DQJB21Z02）基金联合资助


详细信息

作者简介: 苏金波, 男, 1989年出生, 中国地震局地球物理研究所在读博士, 中国地震局乌鲁木齐中亚地震研究所工程师.主要从事人工震源探测, 地震活动性等方面研究.E-mail: fzsujingbo@163.com

通讯作者: 刘敏, 男, 1993年出生, 中国地质大学(北京)在读博士研究生, 主要从事小震识别与定位.E-mail: liumin@cugb.edu.cn

中图分类号: P315

收稿日期:2021-06-28
修回日期:2021-07-22
上线日期:2021-08-10

High resolution earthquake catalog building for the 21 May 2021 Yangbi, Yunnan, M_S6.4 earthquake sequence using deep-learning phase picker

SU JinBo^1,3,,
LIU Min^2,,,
ZHANG YunPeng¹,
WANG WeiTao¹,
LI HongYi²,
YANG Jun⁴,
LI XiaoBin⁴,
ZHANG Miao⁵
1. Institute of Geophysics, China Earthquake Administration, Beijing 100081, China
2. China University of Geosciences(Beijing), Beijing 100083, China
3. Urumqi Institute of Central Asian Seismology, China Earthquake Administration, Urumqi 830011, China
4. Dali Center, China Seismic Experimental Site, Dali Yunnan 671000, China
5. Dalhousie University, Halifax, B3H 4R2, Canada


More Information

Corresponding author: LIU Min,E-mail:liumin@cugb.edu.cn

MSC: P315

--> Received Date: 28 June 2021
Revised Date: 22 July 2021
Available Online: 10 August 2021


摘要
摘要:本文利用深度学习算法PhaseNet、震相关联算法REAL以及多种定位算法快速地构建了2021年5月21日漾濞M_S6.4主震前3天至后7天的高分辨率地震目录，揭示了漾濞地震序列的精细位置分布及详细的时空迁移过程.漾濞地震序列的空间分布表现为多级雁列式结构，深度介于5~10 km之间.主断层自北西端朝着南东向呈放射状分布，并发育有多条贯穿主断层的共轭断层.早期前震随着时间有明显朝着主震迁移的特征，并呈现出一条狭长的条带状构造，反映其可能是地下流体运移的通道.
关键词: 漾濞地震序列/
高分辨率地震目录/
深度学习/
雁列式结构/
流体运移

Abstract:On 21 May 2021, a magnitude (M_S) 6.4 earthquake with significant foreshocks struck Yangbi, Yunnan. We utilized a deep-learning algorithm-PhaseNet, an earthquake association method-REAL and multiple earthquake location methods to rapidly build a ten-day high resolution earthquake catalog for the Yangbi earthquake sequence. The high-resolution catalog consists of 4574 events and reveals the detailed spatio-temporal migration and seismogenic structure of this sequence, which mainly show a multistage echelon structure radiating along SE direction with a depth range between 5 and 10 km. This catalog also outlines multiple orthogonal faults crossing the NE-trending main faults. The initial foreshocks migrate to M_S6.4 mainshock and form a narrow strip, which may represent the channel of fluid migration.
Key words:Yangbi Earthquake sequence/
High-resolution earthquake catalog/
Deep-learning/
Echelon structure/
Fluid migration



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