Fig. 13From: Distribution of low-frequency earthquakes accompanying the very low frequency earthquakes along the Ryukyu TrenchDifferences in epicenters between cross-correlation only and cross-correlation plus S–P time delays. a Difference in epicenters in the Yaeyama area. Blue squares show the epicenters determined using the cross-correlation of the envelope. Red circles show the epicenters determined using the cross-correlation of the envelope and S–P time delays. b Same as a but for the Okinawa areaBack to article page