[1]张丽娜,张红才,巫立华,等.NLLoc定位方法在福建地区的适用性探究[J].华南地震,2021,41(01):34-43.[doi:10.13512/j.hndz.2021.01.05]
 ZHANG Lina,ZHANG Hongcai,WU Lihua,et al.Preliminary Study on the Applicability of NLLoc Method in Fujian Area[J].,2021,41(01):34-43.[doi:10.13512/j.hndz.2021.01.05]
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NLLoc定位方法在福建地区的适用性探究()
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华南地震[ISSN:1006-6977/CN:61-1281/TN]

卷:
41
期数:
2021年01期
页码:
34-43
栏目:
地震科学研究
出版日期:
2021-03-20

文章信息/Info

Title:
Preliminary Study on the Applicability of NLLoc Method in Fujian Area
文章编号:
1001-8662(2021)01-0034-10
作者:
张丽娜张红才巫立华段 刚戴丽金廖诗荣
福建省地震局,福州 350003
Author(s):
ZHANG LinaZHANG HongcaiWU LihuaDUAN GangDAI LijinLIAO Shirong
Fujian Earthquake Agency, Fuzhou 350003, China
关键词:
NLLoc方法地震定位发震时刻误差震中误差深度误差
Keywords:
NLLoc methodSeismic locationOriginal time errorEpicenter errorDepth error
分类号:
P315.7
DOI:
10.13512/j.hndz.2021.01.05
文献标志码:
A
摘要:
利用非线性定位方法NLLoc,对22次人工定点爆破事件和88次福建仙游震群序列M≥1.5级地震事件进行重新定位,并与福建台网日常定位方法进行对比,讨论了NLLoc方法在台网日常业务应用中的可行性。研究结果表明,NLLoc算法无论是人工爆破还是天然地震,其定位结果在发震时刻误差、震中误差和震源深度误差等方面都优于现有定位方法结果,尤其是在震源深度确定方面NLLoc算法优势明显。该方法定位仙游序列活动初期深度较浅与CAP反演2012年4月15日ML 4.1级地震的震源深度一致,地震序列活动中后期深度均值略小于理论估值;而正式目录的地震序列活动初期深度较深,震源深度差值较大,地震序列活动中期深度均值大于理论估值。NLLoc方法可用于台网日常地震定位,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 nonlinear location method NLLoc,the paper relocated 22 explosion events and the 88 events of Xianyou earthquake swarm sequence with M≥1.5 in Fujian,compared with the daily location methods of Fujian network,and discussed the feasibility of the NLLoc method in the daily application of the network. The results show that the NLLoc method is superior to the common location methods in terms of origin time error,epicenter error and depth error,and especially the NLLoc algorithm has obvious advantages in determining the focal depth. The initial depth of Xianyou sequence activity is shallow,which is consistent with the depth of the event ML 4.1 retrieved by CAP occurred On April 15th,2012,and the average depth of the seismic sequence activity in the middle and late periods is slightly smaller than the theoretical estimation. While the seismic sequence activity in the official catalogue has a deeper initial depth and a large difference in focal depth,and the average mid-term depth of seismic sequence activity is greater than the theoretical estimation.In summary,the NLLoc method can be used for daily earthquake location of the network,which is better to solve the problem of focal depth measurement and expected to improve seismic location accuracy.

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备注/Memo

备注/Memo:
收稿日期:2020-06-10
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:171070216@qq.com
更新日期/Last Update: 2021-03-20