Combined use of repeated active shots and ambient noise to detect temporal changes in seismic velocity: application to Sakurajima volcano, Japan

Additional file 1. Comparison of the results of coda-wave interferometry and seismic interferometry on the almost identical wave paths. Gray dots in top two panels are daily dv/v values obtained from seismic interferometry. The dv/v values obtained from coda-wave interferometry are shown by red squares and are overwritten assuming that the results for the 2012 experiment are the same as those on the same day from seismic interferometry. Error bars show Âą one standard deviation. Spatial distribution of three seismometers (squares) and a shot point (star) used in top two panels is shown in the bottom panel with black letters and red letters, respectively