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Earth, Planets and Space
Fig. 2 | Earth, Planets and Space

Fig. 2

From: Deep low-frequency earthquake activity associated with the 2018 eruptions in the Kirishima volcanic complex, Japan

Fig. 2

Geodetic and DLF earthquake observations in the Kirishima volcanic complex during the 2017–2018 period. a Horizontal displacement at Ebino GNSS station relative to Makizono (see Fig. 1). We use the F3 solutions provided by the Geospatial Information Authority of Japan. b Cumulative number of DLF earthquakes (red line) and DLF earthquake magnitudes (green circles). The DLF earthquakes were selected after visual inspection. Arrows mark the timings of appearances of mud pots and jet fumaroles (Tajima et al. 2020), as well as the eruptions. c Frequency index (FI) of the DLF earthquakes. The right panel shows the FI frequency distribution

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