Research on Application Scope of High-Rate GPS in Strong
Earthquake Surface Wave Magnitude
1 School of Geo-science and Environment Engineering, Southwest Jiaotong University, High-Tech Zone，Chengdu 610031,China
2 College of Earth Science, Chengdu University of Technology, 1 Dongsan Road, Chengdu 610059,China
Abstract：High-rate (1 Hz) GPS data from the 2010 Mw7.2 El Mayor-Cucapah earthquake are used to analyze ground motion characteristics, estimate surface wave magnitude by the empirical equation that Gutenberg deduced in 1945, and research the application scope in earthquake magnitude. The results show that for GPS sites within 50-350 km of the epicenter, using its peak displacement, the surface wave magnitude is 7.21, which is consistent with USGS reported Mw7.2. Using sites of epicentral distance greater than 350 km, the magnitude values are within 7.6 to 8.0, which is much larger than Mw7.2. So we suggest that when establishing an empirical model of inversion surface wave magnitude with high-rate GPS, its application scope should be considered.
CHEN Na,GONG Tao,LI Meng et al. Research on Application Scope of High-Rate GPS in Strong
Earthquake Surface Wave Magnitude[J]. jgg, 2015, 35(3): 512-516.
