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地震 ›› 2024, Vol. 44 ›› Issue (1): 204-208.doi: 10.12196/j.issn.1000-3274.2024.01.018

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2023年甘肃积石山6.2级地震序列精定位

左可桢, 赵翠萍   

  1. 中国地震局地震预测研究所, 北京 100036
  • 收稿日期:2023-12-24 修回日期:2024-01-03 出版日期:2024-01-31 发布日期:2024-03-21
  • 通讯作者: 赵翠萍, 研究员。 E-mail: zhaocp@ief.ac.cn
  • 作者简介:左可桢(1991-), 男, 河南永城人, 助理研究员, 主要从事震源参数和地震层析成像研究。
  • 基金资助:
    中国地震局监测司监测运维项目“大震应急快速产出”

Relocation of the 2023 MS6.2 Jishishan Earthquake Sequence in Gansu Province

ZUO Ke-zhen, ZHAO Cui-ping   

  1. Institute of Earthquake Forecasting, China Earthquake Administration, Beijing 100036, China
  • Received:2023-12-24 Revised:2024-01-03 Online:2024-01-31 Published:2024-03-21

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摘要： 本文使用结合波形互相关技术的双差定位方法, 对2023年甘肃积石山6.2级地震序列(截至2023年12月22日24时)进行了重定位。 结果显示, 主震震中位于临夏州积石山县(35.745°N, 102.827°E), 震源深度约为12.5 km。 余震序列呈现出NW和NNW两个展布方向。 其中主震西侧的余震条带呈NW向展布, 深度方向上向NE方向倾斜。 重定位结果显示了该地区具有复杂的构造背景和发震机制。

关键词: 积石山地震, 地震精定位, 余震空间分布, 发震构造

Abstract: This study used the double-difference earthquake location method combined with waveform cross-correlation technique to relocate the MS6.2 Jishishan earthquake sequence (As of 24:00 on December 22, 2023) in Gansu Province. The results show that the epicenter of the MS6.2 Jishishan earthquake is located at Jishishan County, Linxia Prefecture (35.745°N, 102.827°E) and the focal depth is about 12.5 km. The aftershock sequence formed two branches in different directions, which were NW and NNW. The aftershocks near the MS6.2 Jishishan earthquake are distributed in an NW direction, and tilted toward the NE. The relocation results reveal the complex tectonic environment of the region.

Key words: Jishishan earthquake, Earthquake relocation, Spatial distribution of aftershocks, Seismogenic structure

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