Fig. 1
From: Spatial and temporal distributions of b-value in and around Shinmoe-dake, Kirishima volcano, Japan
Distribution of hypocenters with magnitudes greater than \(M = - 0.5\) in the original catalog, January 1, 2007, to October 26, 2017. Triangles show the locations of Shinmoe-dake, Karakuni-dake, Iwo-yama, and Takachihonomine volcanoes of the Kirishima volcano group. The black square and two dotted rectangles show regions where spatial and temporal distributions of b-value were calculated, respectively. Inverted triangles show the locations of observation stations. Stars show the locations of the pressure sources related to the 2011 Shinmoe-dake eruption, as estimated by Nakao et al. (2013) and Ueda et al. (2013). The lower plot is a west–east cross section. The left inset shows the geographic location of Shinmoe-dake volcano, Kyushu, Japan