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LiCSAR Catalogue and Response System of Sentinel-1 Earthquake-Related Interferograms

Session: Application of Remote Sensing and Space-Based Earth Observations Data in Earthquake Research [Poster]

Type: Poster

Date: 4/21/2021

Presentation Time: 11:30 AM Pacific

Description: 

Global seismological catalogues are now a long-established record of world-wide seismic events, which provide important starting points for many follow-on studies in terms of source locations and fault parameters. Until recently, the use of geodetic datasets (particularly InSAR) for measuring deformation associated with moderate to large earthquakes has been on a case-by-case basis performed by individual research groups globally.

Here we present an emerging catalogue of earthquake deformation using the LiCSAR processing system by COMET, which harnesses the global land coverage of ESA’s Sentinel-1 SAR products. The catalogue is aiming to capture continental and subduction related moderate and major events since 2015 by generating coseismic interferograms in 0.001 degrees resolution (WGS-84 system).

As part of the LiCSAR system, we have also developed a fast-responding Earthquake Interferometric Data Provider (EIDP) to generate pre-, co- and post-seismic interferograms over latest earthquake events. The LiCSAR EIDP is triggered by USGS alerts following magnitude 5.5+ shallow continental and larger subduction zone earthquakes, and acts in near-real time, with latencies from when data has been ingested by ESA of a few hours. Depending upon the size of the event, the processing of postseismic data continues for weeks to months following the mainshock. Interferometric products are then served through a web portal: https://comet.nerc.ac.uk/comet-lics-portal-earthquake-event.

The catalogue offers the prospective of being incorporated into disaster response, and the longer-term disaster risk management cycle. Next steps involve analysis of times series approaches to improve estimates of coseismic deformation and automation of modelling of individual events to provide fault parameters and uncertainties to establish a geodetic catalogue of earthquake solutions.

Presenting Author: Chris Rollins

Student Presenter: No

Authors