利用广东地震台网记录的2015年6月珠江口海陆联合地震构造探测项目人工爆破资料，采用MSDP地震分析软件提供的3种常用地震定位方法，对6次人工爆破事件进行分析，将定位结果与已知爆破位置进行对比，验证地震定位精度。结果表明，当地震定位数据满足台网分布方位均匀度ΔU≤0.35、次空隙角（Sgap）≤160°时，广东地区地震震中定位精度优于3 km。
In order to testing the accuracy of earthquake location, we analyzed 6 explosion events by three commonly earthquake location methods provided by MSDP earthquake analysis software. The 6 explosion events were recorded by Guangdong seismic network and exploded by onshore-offshore seismic exploration on Zhujiangkou area in June 2015. Through comparing and analyzing the location results, it shows that when the data satisfies azimuth distribution uniformity of the network ΔU≤0.35, second azimuth gap (Sgap)≤160°, the location accuracy of epicenter is within 3 km in Guangdong area.
2017,38(2): 77-80 收稿日期：2017-01-17
DOI：10.3969/j.issn.1003-3246.2017.02.014
基金项目：地震行业科研专项“全国统一编目系统及其相关体系研制”（项目编号：201308008）
作者简介：黄文辉(1973-),男,高级工程师(正研级),长期从事地震台网地震数据处理软件系统研制工作
参考文献：
范玉兰,林纪曾,胡瑞贺,等.华南地区近震走时表的研制[J]. 华南地震,1990,10(2):1-16.
吕作勇,杨传成,房立华. 广东地震台网近震定位精度的经验性GT准则[J]. 震灾防御技术,2014,9(Z1):657-664.
王平,狄秀玲,李少睿,等.用爆破事件检验区域数字地震台网常规地震定位方法的定位精度[J]. 地震地磁观测与研究,2006,27(3):25-28.
Bondár I, Myers S C, Engdahl E R, et al. Epicenter accuracy based on seismic network criteria[J]. Geophys J Int, 2004, 156:483-496.
Bondár I and McLaughlin K L. A new ground truth data set for seismic studies[J]. Geophys Res Lett, 2009, 80:465-472.
Klein W F. User's Guide to HYPOINVERSE-2000, a Fortran Program to Solve for Earthquake Locations and Magnitudes[M]. U S Geological Survey Open File Report Version 1.0, 2002:2-171.
Myer S C, Schultz C A. Calibration of seismic travel time using events with seismically determined locations and origin times[J]. EOS, Trans Am geophys Un, 2000, 81:F845.
Schweitzer J. HYPOSAT-An Enhanced Routine to Locate Seismic Events[J]. Pure Appl Geophys, 2001,158(1-2):277-289.
