[1]张丽娜,巫立华,段刚,等.利用NLLoc方法对新疆精河地震的定位研究[J].华南地震,2021,41(03):110-115.[doi:10.13512/j.hndz.2021.03.15 ]
 ZHANG Lina,WU Lihua,DUAN Gang,et al.Study on the Location of Jinghe Earthquakes in Xinjiang by Using the NLLoc Method[J].,2021,41(03):110-115.[doi:10.13512/j.hndz.2021.03.15 ]
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利用NLLoc方法对新疆精河地震的定位研究()
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华南地震[ISSN:1006-6977/CN:61-1281/TN]

卷:
41
期数:
2021年03期
页码:
110-115
栏目:
地震科学研究
出版日期:
2021-09-20

文章信息/Info

Title:
Study on the Location of Jinghe Earthquakes in Xinjiang by Using the NLLoc Method
文章编号:
1001-8662(2021)03-0110-06
作者:
张丽娜巫立华段刚戴丽金
(福建省地震局,福州 350003)
Author(s):
ZHANG LinaWU LihuaDUAN GangDAI Lijin
(Fujian Earthquake Agency,Fuzhou 350003,China)
关键词:
NLLoc地震定位新疆精河发震时刻误差震中误差深度误差
Keywords:
NLLocSeismic Location JingheXinjiang Original time errorEpicenter errorDepth error
分类号:
P315.7
DOI:
10.13512/j.hndz.2021.03.15
文献标志码:
A
摘要:
利用非线性定位方法 NLLoc,对新疆精河地区 2017年 8月 9日至 9月 30日期间 M≥3.0级的 22个地震进行重新定位,并与中国地震台网中心正式目录结果进行对比,讨论了 NLLoc方法在速度模型复杂的新疆地区定位的可行性。研究结果表明, NLLoc方法重定位新疆精河地震事件中,在发震时刻、震中方面误差较小,满足定位精度要求,但深度值上相差较大。 NLLoc方法定位结果相对较为集中,主要分布于 14~21 km,与 CAP反演的深度分布为 12-21 km,平均深度 17 km,主震的震源深度 21 km结果相符合,且与新疆地区的平均震源深度 21±10 km和北天山地震带的平均震源深度 19 km的结论相符。结果显示: NLLoc方法可用于地壳速度结构变化大、分布复杂地区的新疆地震定位,且有助于更好地解决震源深度测定问题,提高地震定位精度。
Abstract:
By using the non-linear location method NLLoc,the paper relocates 22 earthquakes with M≥3.0 in the Jinghe area of Xinjiang from August 9th to September 30th,2017,compares them with the official catalog results of the China Earthquake Network Center,and discusses the feasibility of NLLoc method in Xinjiang region where thevelocity model is complicated. The results show that the Jinghe earthquake events in Xinjiang relocated by using theNLLoc method has relatively small errors in the time of occurrence and epicenter, which meets the positioning accuracy requirements, but the depth value is quite different. The positioning results of the NLLoc method are relatively concentrated, which are mainly distributed during 14~21 km, and is consistent with the results obtained by the CAP inversion with a depth of 12~21 km,an average depth of 17 km,and a focal depth of 21 kmof the main shock. It is also consistent with the conclusion that the average focal depth of the Xinjiang region is 21±10 km and the average focal depth of the northern Tianshan seismic belt is 19 km. In summary,the NLLoc method can be used to locate earthquakes in Xinjiang with large changes in crustal velocity structure and complexdistribution, and it helps to better solve the problem of focal depth determination and improve the accuracy ofearthquake positioning.

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备注/Memo

备注/Memo:
收稿日期:2020-12-18
基金项目:福建省地震局局科技基金项目(SF202011)
作者简介:张丽娜(1987-),女,硕士研究生,主要从事地震观测、三维定位等方面研究。 E-mail:zhangln@fjea.gov.cn

更新日期/Last Update: 2021-09-30