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Earth, Planets and Space
Fig. 3 | Earth, Planets and Space

Fig. 3

From: A simple method to evaluate the air-to-ground coupling efficiency: a tool helping the assessment of seismic/infrasonic energy partitioning during an eruption

Fig. 3

a Amplitude response of the ground velocity to infrasound, \(H_{ps}\), obtained by this study is shown for 1–3.5 Hz (red line), 3.5–7 Hz (green line), 7–12 Hz (blue dashes), and 12–18 Hz (purple dashes). The results are compared with the response function obtained by Ichihara (2016) (black line; Fig. 1d). b Corresponding cross-correlation coefficient between the phase-shifted seismic data, \(d_v^h\), and the infrasonic data, \(d_p\). The colors indicate the frequency bands as in a

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