Fig. 3From: Combined use of repeated active shots and ambient noise to detect temporal changes in seismic velocity: application to Sakurajima volcano, JapanSpatial distribution of seismic velocity changes estimated from the coda-wave interferometry analysis of the vertical-component records in 2011–2012, 2012–2013, and 2012–2014 periods. The results are shown for 2–4, 4–8, and 8–16 Hz, and lines connect the stations and shot points. Blue lines indicate seismic velocity increase and red ones show decreaseBack to article page