Acknowledgments
A. Ziv initially proposed to search for the precursory seismic signal. I thank J.-P. Ampuero for providing helpful comments on an early version of this manuscript. This research was conducted while I was on leave at Université Côte d’Azur, Nice, France, enabled through a generous grant from the Observatoire de la Côte d’Azur. 
The work is dedicated to the victims of the October 7 terrorist attack.