Fig. 3From: Deep low-frequency earthquake activity associated with the 2018 eruptions in the Kirishima volcanic complex, JapanGeodetic and DLF earthquake observations in the Kirishima volcanic complex during the 2010–2011 period. a Horizontal displacement at Ebino GNSS station relative to Makizono (see Fig. 1). b Cumulative number of DLF earthquakes (red line) and DLF earthquake magnitudes (green circles). c Frequency index (FI) of the DLF earthquakes. The median FI value (red line) is based on a moving window of 15 events. The right panel shows the FI frequency distributionBack to article page