Journal
SEISMOLOGICAL RESEARCH LETTERS
Volume 86, Issue 6, Pages 1549-1556Publisher
SEISMOLOGICAL SOC AMER
DOI: 10.1785/0220150152
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Funding
- National Aeronautics and Space Administration Applied Sciences/Disasters Program
- National Aeronautics and Space Administration Advanced Information Systems Technology (AIST) Program
- Division Of Earth Sciences
- Directorate For Geosciences [1261833] Funding Source: National Science Foundation
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The 25 April 2015 M-w 7.8 Gorkha earthquake caused more than 8000 fatalities and widespread building damage in central Nepal. The Italian Space Agency's COSMO-SkyMed Synthetic Aperture Radar (SAR) satellite acquired data over Kathmandu area four days after the earthquake and the Japan Aerospace Exploration Agency's Advanced Land Observing Satellite-2 SAR satellite for larger area nine days after the main-shock. We used these radar observations and rapidly produced damage proxy maps (DPMs) derived from temporal changes in Interferometric SAR coherence. Our DPMs were qualitatively validated through comparison with independent damage analyses by the National Geospatial-Intelligence Agency and the United Nations Institute for Training and Research's United Nations Operational Satellite Applications Programme, and based on our own visual inspection of DigitalGlobe's World-View optical pre- versus postevent imagery. Our maps were quickly released to responding agencies and the public, and used for damage assessment, determining inspection/imaging priorities, and reconnaissance fieldwork.
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