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

Fig. 2

From: Permutation entropy variations in seismic noise before and after eruptive activity at Shinmoedake volcano, Kirishima complex, Japan

Fig. 2

Diagrams showing the variation of PE for station SMN during the three eruption cycles at Shinmoedake volcano. Spectrograms for the same time periods are shown at the bottom of each PE plot and spectral amplitudes follow the colored scales at the right. The double arrows on top of each diagram delineate the three different periods discussed in the main text. The green dashed line in the top panel indicates the time of the small phreatic eruption on 19 January 2011

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