Improving Ms Estimates by Calibrating Variable-Period Magnitude Scales at Regional Distances

摘要

During the final year of our project, we have calibrated the use of surface-wave magnitudes (Ms), measured at regional distances as a rapid and robust estimator of seismic moment. We have used the Russell (2006) variable period surface-wave magnitude formula to convert Ms to seismic-moment magnitude, Mw, at local to regional distances using global datasets. In this pilot study, the Russell Ms technology was applied to 169 North American events with 3.2.