S11A-2756
A New Method for Determining the Seismicity Rate and its Dispersion based on the Gutenberg-Richter Law
Monday, 14 December 2015
Poster Hall (Moscone South)
Kuei-Pao Chen, Hsin Sheng Junior College of Medical Care and Management, Longtan Township, Taiwan; National Center for Research on Earthquake Engineering, strong ground motion, Taipei, Taiwan, Yi-Ben Tsai, Pacific Earthquake Science Associates, Los Altos, CA, United States and Wen-Yen Chang, National Dong Hwa University, Hualien County, Taiwan
Abstract:
In
this paper we propose a new method for determining the seismicity rate and its dispersion by using the logarithmic mean and standard deviation, instead of the conventional arithmetic mean for the Gutenberg-Richter law. Our method will enable us to include both the seismicity rate and its standard deviation in a closed functional form. We use the shallow seismicity data of the National Earthquake Information Center (NEIC) global catalog and Taiwan Central Weather Bureau’s (CWB) regional catalog to demonstrate the advantages of this new method. Our study shows that the standard deviation of logarithmic distribution is significantly smaller than that of arithmetic distribution for both data sets. The logarithmic distribution also gives more stable determination of the seismicity rate than the arithmetic distribution. Our study yields the following results :For global crustal seismicity: log10 N=8.10-1.03M+-0.11,
For Taiwan crustal seismicity: log10 N=5.60-0.87M+-0.25.
