Fig. 6.From: Continuous long-term array analysis of seismic records observed during the 2011 Shinmoedake eruption activity of Kirishima volcano, southwest JapanSpectrogram of 10 minutes of a weak continuous tremor recorded by vertical seismometer of KR07. The window’s starting time is 03:50 JST on 5 February, 2011, which is the same as Fig. 7. The spectrogram was calculated for a 4 s window 75% overlap using the FFT.Back to article page