Application of NASA Damage Proxy Maps for Assessing Structural Performance in 2016 Central Italy Earthquake Sequence

National Aeronautics and Space Administration (NASA) Damage Proxy Maps (DPMs) are products that were developed by NASA’s Jet Propulsion Lab (NASA-JPL) to map damage after major natural and anthropogenic disasters. The maps utilize pairs of synthetic aperture radar (SAR) images to detect areas that have experienced significant coherence loss following a disaster event. Areas with significant coherence loss as identified by DPMs are expected to have surface change, which may be related to damage phenomena, such as structural damage. Limited prior research that quantitatively associates a DPM index related to coherence change to structural damage assessed in person is extended here to investigate associations with the probability of exceeding various structural damage states. The damage state considered here is partial or full collapse, using a newly evaluated data set from Amatrice, Italy from the M6.1 Central Italy earthquake (the first major seismic event of the 2016 Central Italy earthquake sequence). Taking a DPM-conditioned probability ≥ 0.5 as a prediction of partial or full collapse, we find that the DPM has a recall of 80.9%, a precision of 60.8%, and an accuracy of 65.8% in regards to identifying partial or full collapse of structures.