THE DETERMINATION OF SOURCE PARAMETERS FOR SMALL EARTHQUAKES FROM A SINGLE, VERY BROAD-BAND SEISMIC STATION

被引:69
作者
FAN, G
WALLACE, T
机构
[1] Department of Geosciences, University of Arizona
关键词
D O I
10.1029/91GL01804
中图分类号
P [天文学、地球科学];
学科分类号
07 ;
摘要
The installation of very broadband seismic stations makes it possible to recover the source parameters of small earthquakes (2.5 < M(L) 5.0) which occur at local and regional distances. If the gross crustal structure along the travel path is known, it is possible to use the P, SV and SH displacement waveforms from a single station to determine the seismic moment tensor. Although the details of the crustal structure strongly affect the body waveforms at regional distances, the signature of the seismic source orientation on the waveform is robust at frequencies less than 1-3 Hz. We explore the trade-offs between crustal model, hypocentral depth and filtering for a linear moment tensor inversion procedure. The procedure is tested on two small earthquakes which occurred in the Rio Grande Rift and were recorded at the IRIS/USGS station ANMO. The agreement between the single station moment tensor inversion fault plane parameters and those determined from local first motions is excellent.
引用
收藏
页码:1385 / 1388
页数:4
相关论文
共 10 条
[1]   SINGLE STATION CMT - APPLICATION TO THE MICHOACAN, MEXICO, EARTHQUAKE OF SEPTEMBER 19, 1985 [J].
EKSTROM, G ;
DZIEWONSKI, AM ;
STEIM, JM .
GEOPHYSICAL RESEARCH LETTERS, 1986, 13 (03) :173-176
[2]  
HELMBERGER DV, 1977, B SEISMOL SOC AM, V67, P301
[3]   A PROCEDURE FOR THE JOINT INVERSION OF REGIONAL AND TELESEISMIC LONG-PERIOD BODY WAVES [J].
HOLT, WE ;
WALLACE, TC .
GEOPHYSICAL RESEARCH LETTERS, 1987, 14 (09) :903-906
[4]  
JIMENEZ E, 1989, B SEISMOL SOC AM, V79, P955
[5]  
LANGSTON CA, 1982, B SEISMOL SOC AM, V72, P729
[6]  
LANGSTON CA, 1981, B SEISMOL SOC AM, V71, P1
[7]  
PATTON HJ, 1988, B SEISMOL SOC AM, V78, P1133
[8]  
SANFORD AR, 1977, MONOGRAPH AGU, V20, P385
[9]  
STUMP BW, 1977, B SEISMOL SOC AM, V67, P1489
[10]   DETERMINING SOURCE PARAMETERS OF MODERATE-SIZE EARTHQUAKES FROM REGIONAL WAVEFORMS [J].
WALLACE, TC ;
HELMBERGER, DV .
PHYSICS OF THE EARTH AND PLANETARY INTERIORS, 1982, 30 (2-3) :185-196