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

Fig. 2

From: Identification of infrasonic and seismic components of tremors in single-station records: application to the 2013 and 2018 events at Ioto Island, Japan

Fig. 2

Vertical ground velocity of TR1 on April 11, 2013, and TR2 on September 12, 2018. a, b The raw records at IOCD (black), IJSV (yellow), and IJTV (blue). c, d The spectrograms for the data at IOCD. The color bars indicate the power in dB = 10 \(\hbox {log}_{10}\)(PSD/\(\hbox {PSD}_{\mathrm{ref}}\)) with \(\hbox {PSD}_{\mathrm{ref}}\) = 1 (m s\(^{-1}\))\(^2\)/Hz

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