HR: 1340h
AN: S23A-0284    [Abstracts]
TI: An Inhomogeneous Distribution Model of Strong Earthquakes along Strike-slip Active Fault Segments on the Chinese Continent and Its Implication in Engineering Seismology
AU: * Zhou, B
EM: zhoubg1964@263.net
AB: Through the statistical analysis of earthquake distribution along 51 strike-slip active fault segments on the Chinese continent, We found that strong earthquake distribution along the seismogenic fault segments is inhomogeneous and the distribution probability density pœ"Kœc can be stated as pœ"Kœc=1.1206exp-3.947 in which K=S/(L/2), S refers to the distance from earthquake epicenter to the center of a fault segment , L is the length of the fault segment. The above model can be utilized to modify the probability density of earthquake occurrence of the maximum magnitude interval in a potential earthquake source. Nevertheless, it is only suitable for those potential earthquake sources delineated along a single seismogenic fault. This inhomogeneous model has certain effect on seismic risk analysis, especially for those potential earthquake sources with higher earthquake reoccurrence rates of the maximum magnitude interval. In general, higher reoccurrence rate of the maximum magnitude interval and lower exceeding probability level may bring larger difference of the results in seismic risk analysis by adopting the inhomogeneous model, the PGA values increase inner the potential earthquake source, but reduce near the vicinity and out of the potential earthquake source. Taking Tangyin potential earthquake source as an example, with exceeding probability of 10% and 2% in 50 years, the difference of the PGA values between inhomogeneous model and homogenous models can reach to 12%.
DE: 7223 Seismic hazard assessment and prediction
DE: 7230 Seismicity and seismotectonics
SC: Seismology [S]
MN: 2004 AGU Fall Meeting