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

Fig. 4

From: Ionospheric signatures of the April 25, 2015 Nepal earthquake and the relative role of compression and advection for Doppler sounding of infrasound in the ionosphere

Fig. 4

a RMS amplitudes normalized by maximum value of the vertical velocity v Z of the ground surface movement (solid red for Taivan, dashed red for the Czech Republic) and of the observed Doppler shifts (solid blue for Taiwan, dashed blue for the Czech Republic) for the signals displayed in Fig. 2. A low-pass filter with cut-off at ~0.02 Hz was applied before calculating the normalized RMS amplitudes (see the text for more details). Time = 0 corresponds to the time of the earthquake. b RMS amplitudes of the vertical velocity v Z of the ground surface movement (solid red for Taiwan, dashed red for the Czech Republic) and of the observed Doppler shifts (solid blue for Taiwan, dashed blue for the Czech Republic) for the signals displayed in Fig. 2

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