Observation of Precursor of the Kamchatka Earthquake by Monitoring an Optical Fiber Link in the Mediterranean Sea. - Antonio Mecozzi; Cristian Antonelli; Alberto Marullo; Danilo Decaroli; Luca Palmieri 001; Luca Schenato 002; Siddharth Varughese; Pierre Mertz; Mohammad M. Hosseini; Antonio Napoli (ECOC, 2025)