以2014年金寨震群为研究对象,采用MSDP软件的单纯形定位、震源区流动台站直达波到时差、双差定位、PTD等方法测定震源深度,并进行对比分析。结果表明,PTD法测定震源深度结果更为可靠,金寨震群震源深度在4-5 km集中分布。
Jinzhai earthquake swarm in 2014 is taken as research subject. Using simplex algorithm in MSDP software, double difference algorithm and PTD methods and different direct wave arrival time of mobile stations in focal region, earthquake focal depth is determined. The comparative analysis of the results shows that PTD method more suitable for measuring the depth of earthquake. The depth of the earthquake swarm concentrated in 4-5 km.
2017,38(2): 26-30 收稿日期:2016-06-01
DOI:10.3969/j.issn.1003-3246.2017.02.006
基金项目:安徽省地震科研基金青年扶持项目(项目编号:20150502);测震台网青年骨干培养专项(项目编号:20160513)
作者简介:韩成成(1987-),男,硕士,助理工程师,从事地震监测与系统运维工作
参考文献:
房明山,杜安陆,董孝平,等.用sPn震相测定近震震源深度[J].地震地磁观测与研究,1995,16(5):13-18.
陈贵美,杨选,刘锦.广东数字地震台网"十五"系统的集中地震定位方法的定位效果分析[J].华南地震,2009,29(1):69-78.
黄显良,郁建芳,戚浩,等.安徽霍山窗中小地震活动与精定位研究[J].地震工程学报,2016,38(2):1-7.
罗艳,曾祥方,倪四道.震源深度测定方法研究进展[J].地球物理学进展,2013,28(5):2309-2321.
朱元清,夏从俊,李平.确定震源深度的PTD方法及其应用[J]. 地震地磁观测与研究,1997,18(3):21-25.
赵珠,丁志峰,易桂喜,等.西藏地震定位——一种使用单纯形优化的非线性方法[J]. 地震学,1994,16(2):212-219.
Saikia C K,Woods B B,Thio H K. Calibration of the regional crustal waveguide and the retrieval of source parameters using waveform modeling[J].Pure and ApplGeophys, 2001, 158(7):1301-1338.
Zhang Tianzhong, Wu Bater, Huang Yuan, et al. Effect of the data recorded at nearby stations on earthquake relative location[J]. Chinese J Geophys (in Chinese), 2007, 50(4):1126-1130.