RT Journal Article
T1 InSAR-Based Mapping to Support Decision-Making after an Earthquake
A1 Bejar Pizarro, Marta
A1 Álvarez Gómez, José Antonio
A1 Staller, Alejandra
A1 Luna, Marco P.
A1 Pérez López, Raúl
A1 Chunga, Kervin
A1 Lima, Aracely
A1 Galve, Jorge Pedro
AB It has long been recognized that earthquakes change the stress in the upper crust around the fault rupture and can influence the behaviour of neighbouring faults and volcanoes. Rapid estimates of these stress changes can provide the authorities managing the post-disaster situation with valuable data to identify and monitor potential threads and to update the estimates of seismic and volcanic hazard in a region. Here we propose a methodology to evaluate the potential influence of an earthquake on nearby faults and volcanoes and create easy-to-understand maps for decision-making support after large earthquakes. We apply this methodology to the Mw 7.8, 2016 Ecuador earthquake. Using Sentinel-1 Interferometric Synthetic Aperture Radar (InSAR) and continuous GPS data, we measure the coseismic ground deformation and estimate the distribution of slip over the fault rupture. We also build an alternative source model using the Global Centroid Moment Tensor (CMT) solution. Then we use these models to evaluate changes of static stress on the surrounding faults and volcanoes and produce maps of potentially activated faults and volcanoes. We found, in general, good agreement between our maps and the seismic and volcanic events that occurred after the Pedernales earthquake. We discuss the potential and limitations of the methodology.
PB MDPI AG
SN 2072-4292
YR 2018
FD 2018
LK https://hdl.handle.net/20.500.14352/12270
UL https://hdl.handle.net/20.500.14352/12270
LA eng
NO European Commission, Directorate-General Humanitarian Aid and Civil Protection
NO Ministerio de Economía y Competitividad (MINECO)
DS Docta Complutense
RD 8 may 2024