FEATURES OF SEISMICITY FOR THE CENTRAL COAST REGION OF CALIFORNIA
Ma Li(Center for Analysis and Prediction, SSB)B. A. Bolt R. A. Uhrhammer (Seismographic Station, University of California Berkeley, U. S. A.)
In this paper, we want to know the temporal and spatial features of seismicity in central coast region of California. So we apply the methods of C-value, b-value and frequency of earthquakes. The background for 36 years of earthquakes activity is analyzed. From the analysis of data of C-value, it is believed that the spatial distribution of earthquakes is relatively more concentrated than of the random distribution. There are no significant changes in the b-value. In general, the frequency of earthquakes are stable and close on the average rate. Several peaks of frequency appear around earthquakes M≥5.0. The features of seismicity are more differences between North China and the central coast California.