In an attempt to improve earthquake locations for China as a first step for velocity inversion, we will assess the quality of secondary arrivals and analyze the effect of including them in location calculations. Utilizing data from the ISC, the USGS EDR, and the pIDC REB catalogs, as well as regional picks from the Los Alamos National Laboratory database, we will identify secondary arrivals and weight them accordingly in the event location process. While shear arrivals are commonly identified in regional waveforms, they are not systematically defined for use in location determination. By analyzing the effect of secondary arrivals on earthquake locations and whether such arrivals improve regional locations, we will be able to produce an accurate data set for later use in velocity inversion for China. Study Area and Velocity Models Left - Western China study area.
Red box is major study region.
Blue box is InSAR region of detailed study using actual and synthetic data shown in Figures 3-6. Right - P and S Velocity models used in study. Please direct comments and questions to the principal author . UC2001 - For conditions of use, see Disclaimer .