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Fig. 4 | Earth, Planets and Space

Fig. 4

From: Determination of the source parameters of the 2011 Tohoku-Oki earthquake from three-component pre-P gravity signals recorded by dense arrays in Japan

Fig. 4

source correction. The noise level is 0.050 nm/s2. The range is [− 170 s, − 49 s]. b Vertical component in the frequency band of 0.002–0.03 Hz. The noise level is 0.050 nm/s2. The range is [− 180 s, − 70 s]

Stacked waveforms of the observed (red) and synthetic (black) data. Time 0 is set to the stacking reference time \({t}_{\mathrm{P}}\). The synthetic data are calculated for the GCMT point source, but the dip angle and Mw are set to 13° and Mw 8.85, respectively. The right vertical axis “SNR” indicates the signal-to-noise ratio. The arrow indicates the region of origin times [\({-t}_{p}^{max}, {-t}_{p}^{min}\)]. a Horizontal components in the frequency band of 0.002–0.05 Hz. The amplitude of the stacked synthetic waveforms includes the point

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