Fig. 8

a A long-term velocity change and vertical deformation at the LVC. Red line is dv/v for stack of 30 days in a frequency range of 0.3–0.7 Hz with the coda window ranging from −50 to −20 s and 20 to 50 s. Gray circles are up–down displacements (USGS solutions) at GPS site P668 with the one-sigma error bars. Also shown is a 30-day median GPS displacement (green line). Note that the mean and the linear trend were removed from GPS and dv/v data. Dashed red line is the occurrence time of the 24 May 2013 M 5.7 Greenville earthquake. b Phase lag (solid circle) and coherence (open squares) between 30-day running median GPS (green line in a) and dv/v (red line in a) time series. A positive phase lag indicates that the dv/v change lags behind the vertical deformation change. Note that phase lag and coherence are plotted at the end of the 1-year time window used to compute those parameters. c Modeled precipitation (black bars) and slow depth (blue line) at Lassen Peak