Local-scale cross-correlation of seismic noise from the Calico fault experiment

摘要: Most studies of seismic noise cross-correlation (NCC) have focused on regional/continental scale imaging using empirical surface-wave Green’s functions extracted from primary (0.05–0.08 Hz) and secondary (0.1–0.16 microseisms. In this work, we present the NCC results at higher frequencies (>0.5 6 months recorded by a local array (~4 km aperture) deployed along Calico fault in Mojave Desert, California. Both fast slow propagating waves are observed record-sections. We compare NCCs sensor pairs that share common with records borehole shot located very close to sensor. The result shows good match arrivals, indicating method is able recover unbiased scales. strong body-wave component caused P generated offshore Along SW–NE profile across fault, observe apparent P-wave arrivals their reflections, which can be explained low-velocity-zone (LVZ) fault. calculate LVZ width ~ 2.3 km, velocity reduction within ~35 %. These estimates consistent other evidence for relatively wide