Magnitude estimation and ground motion prediction to harness fiber optic distributed acoustic sensing for earthquake early warning.

ABSTRACT: Earthquake early warning (EEW) systems provide seconds to tens of seconds of warning time before potentially-damaging ground motions are felt. For optimal warning times, seismic sensors should be installed as close as possible to expected earthquake sources. However, while the most hazardous earthquakes on Earth occur underwater, most seismological stations are located on-land; precious seconds may go by before these earthquakes are detected. In this work, we harness available optical fiber infrastructure for EEW using the novel approach of distributed acoustic sensing (DAS). DAS strain measurements of earthquakes from different regions are converted to ground motions using a real-time slant-stack approach, magnitudes are estimated using a theoretical earthquake source model, and ground sh

SUBMITTER: Lior I 

PROVIDER: S-EPMC9829724 | biostudies-literature | 2023 Jan

REPOSITORIES: biostudies-literature