Cyclones in the Mediterranean generate seismic signals

(ANSA) – CATANIA, DECEMBER 10 – The seismic signature of the Medicane has been discovered: the tropical cyclones that occur in the Mediterranean Sea, with their violent wave motions, generate a seismic signal from which useful information can be extracted for studying and monitoring these weather phenomena -extreme marine.

This is indicated by the international research published in the journal Scientific Reports and conducted by the Department of Biological, Geological and Environmental Sciences of the University of Catania, the Etna Observatory of the National Institute of Geophysics and Volcanology (Ingv), the Department of Geosciences of the University of Malta, the Royal Observatory of Belgium, the National Center for the environmental characterization and protection of the coastal strip, marine climatology and operational oceanography of Ispra and the AC2 company.

Between the end of October and the beginning of November 2021, eastern Sicily, especially the provinces of Catania, Messina and Syracuse, was hit by heavy rains, gusts of wind and storm surges due to the presence of a Medicane (MEDIterranean hurriCANE ) in the Ionian Sea, called ‘Apollo’. “This work analyzed and integrated the seismic signals recorded by 78 stations installed in Italian, Maltese and Greek coastal areas”, says one of the authors of the research, Andrea Cannata of the University of Catania. “During the days of progressive intensification of Apollo, the seismic stations installed in the Ionian area – he continues – showed a gradual increase in the energy content of the microseism in a particular frequency band (0.1-0.2 Hz). The seismic signature of the Medicane”.

For scholars, the way is opening to the possibility of analyzing “extreme weather-marine events that occurred in the past” in order to evaluate the evolution of the intensity of these phenomena over time and to obtain new information useful for the study of climate change. .