Exploring remote earthquake triggering potential across EarthScopes' Transportable Array through frequency domain array visualization

摘要: To better understand earthquake source processes involved in dynamically triggering remote aftershocks, we use data from the EarthScope Transportable Array (TA) that provide uniform station sampling, similar recording capabilities, large spatial coverage, and, many cases, repeat sampling at each site. avoid spurious detections, which are an inevitable part of automated time domain amplitude threshold detection methods, develop a frequency algorithm identifies coherent signal patterns through array visualization. This method is tractable for sets, ensures robust catalogs, and delivers higher resolution observations than what available current catalogs. We explore seismicity rate changes local to TA stations following 18 global main shocks (M ≥ 7) generate median peak dynamic stress amplitudes 0.001–0.028 MPa across array. From these shocks, find no evidence prolific or widespread continental U.S. within shock's wave train shock transients 2 days. However, limited increases exist localized regions. These results suggest data, prolific, rare phenomenon throughout wide range observable magnitudes. further conclude lower previously reported thresholds, surface does not correlate well with observed cases triggering. propose other characteristics wavefield, addition specific conditions site, will drive occurrence amplitudes.