Western China

The goal of ambient noise tomography (ANT) is to improve the calibration of surface wave propagation in aseismic areas, especially at periods shorter than 20 sec, which are hard to obtain from earthquake surface waves. In earlier work,we improved and optimized the method of ambient noise surface wave tomography for systematic application and applied it to broad-band seismic data obtained in Europe and the western part of the Middle East. The resulting phase and group speed measurements were presented at last year's MRR meeting