Fig. 2
From: Magnitude–frequency distribution of volcanic explosion earthquakes
Magnitude–frequency distributions of explosion earthquakes at Sakurajima volcano, Japan, for a 1963–1999 (Minami-dake crater) and b 2008–2011 (Showa crater). Left-hand graphs have log–log scale, and right-hand ones semilogarithmic. Parameters of N b, r and a 0 represent the number of bins, correlation coefficients and characteristic amplitude of the exponential distribution. Regression lines and correlation coefficients are in red. Regression lines and correlation coefficients in blue are determined from data with the five lowest-amplitude bins removed