Short-Term Foreshocks as Key Information for Mainshock Timing and Rupture: The M_w6.8 25 October 2018 Zakynthos Earthquake, Hellenic Subduction Zone.

We adopt that strong foreshock signal is evident when at least both these changes are highly significant at the level of 95%, while weak foreshock signal is adopted if at least one change is significant, i.e., ranging between the levels of 90% and 95%. 2.2.3.

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