First DAS observations from the GeoLab fibre in Madeira, Portugal

Distributed Acoustic Sensing allows extremely dense acquisition geometries of strain data. The GeoLab fibre, installed on the southern coast of Madeira Island, extends for ∼56 km and is exclusively dedicated to research. This fibre provides an invaluable resource for continuous data collection and analysis. Between October 26th and November 3rd , 2023, ∼7 TB of data were collected at 500 Hz with gauge length of 10.2 m at each 5.1 m. This report highlights the versatility of the GeoLab fibre and the present dataset for seismological, oceanographic, and biological research with a non-exhaustive collection of examples in various scientific domains, such as local and teleseismic events, calls from different species of baleen whales, waves and their interaction with the shoreline, ocean-bottom currents and temperatures, and anthropogenic noise sources.