Authors
Florian Le Pape, Stephan Ker, Shane Murphy, Giorgio Riccobene, Salvo Viola, Salvo Aurnia, Sara Pulvirenti, Marc-André Gutscher
Publication date
2024/5/6
Source
GC12-FibreOptic
Issue
GC12-FibreOptic-49
Publisher
Copernicus Meetings
Description
In November 2023, DAS (Distributed Acoustic Sensing) data were acquired along few fibers of the MEOC cable of the INFN-LNS submarine infrastructure, extending circa 29 km off the coast of Catania; one of these fibers is terminated with a further 6km-long optical fiber layed on the seafloor in the context of the FOCUS-ERC project. In addition another set of measurements were conducted using the INFN-LNS MEOC cable deployed offshore Capo Passero, probing a 200 km loop implemented on a pair of fibers. With almost 2 weeks of recordings, the DAS interrogator captured multiple types of signals from ocean waves to earthquakes and even volcanic tremors linked with an eruption phase of Etna. Here, we investigate in particular the ambient seismic noise associated to the sea state that was recorded on each cable. With the goal to identify and locate noise sources for using passive seismic imaging in the area …