Peak ground velocity from dense seismic array in southern California

Published: 26-02-2020| Version 1 | DOI: 10.17632/99yhdvj93x.1
Christopher Johnson,
Debi Kilb,
Annemarie Baltay,
Frank Vernon


The study explores the variability in peak ground velocity for >1000 nodal seismometers located in a small area on an active fault. The PGV values are derived from the 30 waveform trace for the station listed in the ZG network deployed from 07 May 2014 to 08 June 2014 at Sage Brush Flat on the San Jacinto Fault near Anza, California. Included is a Python dataframe (pickle file) that contains calculated values described in Supplement for 38 M>=2 earthquakes. An IPython notebook to load and view the Python DataFrame. Additional files of the estimated P-wave and S-wave velocities (m/s) within the top 148 meters near the SGB network. These data include the longitude and latitude of the surface station, and the estimated average Vp or Vs within the top 148 meters below the network. To compute Vp we use a distance of 148 meters (i.e., distance between the borehole station and the surface) and the S-wave travel time (lag) from the 148 meter borehole to the surface. The estimated travel time is the lag-time between the arrival at a 148 meter borehole and the arrival at each surface station. Johnson, C.W., D. Kilb, A. Baltay and F. Vernon (in press). Peak ground velocity spatial variability revealed by dense seismic array in southern California. Journal of Geophysical Research: Solid Earth.