How Close Are We to Integrating Fiber-Optic Distributed Acoustic Sensing in Earthquake Early Warning Systems?
Description:
We present a roadmap for the incorporation of fiber-optic distributed acoustic sensing (DAS) in earthquake early warning (EEW) systems. Significant strides have been made in the field of fiber-optic DAS. The technology is being used in seismic and volcanic monitoring, seismic profiling and imaging, and various other geophysical applications. However, operational EEW systems all over the world have yet to utilize DAS arrays for rapid earthquake detection and characterization purposes. Strain (measured by traditional strainmeters) has been recently demonstrated to have the potential to complement velocity and acceleration data for earthquake parameter quantification traditionally used in EEW systems. The incorporation of DAS strain in EEW systems could be a gamechanger through sheer upscaling in sensor coverage, especially for offshore environments where traditional seismic and geodetic instrumentation is sparse and costly to install, but where unlit optical fibers are abundant. As most DAS arrays are not formally coupled installations dedicated to seismic monitoring, there remain technical challenges for a full employment of DAS strains in EEW systems, notably the acquisition of accurate, multi-component strain amplitudes that could be converted to other ground-motion measurements. DAS researchers need a clear understanding of how a typical EEW system works, and especially its data requirements and processing flows. Likewise, the EEW community requires clear demonstrations of the robustness of DAS strains, and evidence of accurate outcomes in either running currently available algorithms with strain-derived data, or in strain-based EEW algorithms. In this work, we present a list of required DAS capabilities and array attributes for EEW and outline a roadmap that would take us from where DAS technology is today to the point where it can be fully utilizable in EEW applications.
Session: Understanding Earth Systems with Fiber-optic Cables [Poster]
Type: Poster
Date: 4/19/2023
Presentation Time: 08:00 AM (local time)
Presenting Author: Noha S. Farghal
Student Presenter: No
Invited Presentation:
Authors
Noha Farghal Presenting Author Corresponding Author nfarghal@rms.com Moody's RMS |
Jessie Saunders jsaunder@caltech.edu California Institute of Technology |
Grace Parker gparker@usgs.gov U.S. Geological Survey |
|
|
|
|
|
|
How Close Are We to Integrating Fiber-Optic Distributed Acoustic Sensing in Earthquake Early Warning Systems?
Category
Understanding Earth Systems with Fiber-optic Cables