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Earth, Planets and Space
Fig. 4 | Earth, Planets and Space

Fig. 4

From: Linking the flow-induced tremor model to the seismological observation: application to the deep harmonic tremor at Hakone volcano, Japan

Fig. 4

Development of the channel oscillation by flow of magma (a) and super-critical fluid (b). The cross-sectional area, \(\alpha\), and the flow velocity, v, are shown as functions of the lapse time. The inset in (b) shows a magnified waveform of \(\alpha\) from 45 to 50 s. The parameter values are listed in Tables 1 and 2, and \(\alpha _s=0.153\) and 0.059 m\(^2\) for (a) and (b), respectively. Phase portraits \((\dot{\alpha }, \ddot{\alpha })\) are shown using the waveforms in the yellow-colored period (a: 20–25 s, b:45–50 s)

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