Extended Data Fig. 9: PEGSNet noise test.
From: Instantaneous tracking of earthquake growth with elastogravity signals
Density plot of the predictions obtained for 1,000 real noise recordings (the same used in Extended Data Fig. 8) assuming P-wave arrivals (but no PEGS) as in the real data for the Tohoku-Oki earthquake. The median, Q1–Q3 interquartile range and the 5th–95th percentiles of the distribution are reported with solid, dotted and dashed red lines respectively. This test confirms that the results of Fig. 3 are indeed constrained by the data in the pre-P-wave time window (PEGS). The predicted Mw(t) tends towards a constant value of 6.5, which is considered as the baseline value when no information can be extracted from PEGS.