Science Daily   October 17, 2023 An international team of researchers (USA – Caltech, industry, Chile) provided a real‐data test for offshore earthquake early warning (EEW) with distributed acoustic sensing (DAS) by transforming submarine fiber‐optic cable into a dense seismic array. They constrained earthquake locations using the arrival‐time information recorded by the DAS array and earthquake magnitudes were estimated directly from strain rate amplitudes by applying a scaling relation transferred from onshore DAS arrays. According to the researchers their results indicate that using this single 50 km offshore DAS array can offer ∼3 s improvement in the alert time of EEW […]