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Technical Note

A Preliminary Damage Assessment Using Dual Path Synthetic Aperture Radar Analysis for the M 6.4 Petrinja Earthquake (2020), Croatia

1
Department of Remote Sensing and GIS, University of Tabriz, Tabriz 5166616471, Iran
2
Institute of Environment, University of Tabriz, Tabriz 5166616471, Iran
3
Department of Architecture and Building Engineering, Tokyo Institute of Technology, 4259-G3-2 Nagatsuta, Midori-ku, Yokohama 226-8502, Japan
*
Author to whom correspondence should be addressed.
Academic Editor: Salvatore Stramondo
Remote Sens. 2021, 13(12), 2267; https://0-doi-org.brum.beds.ac.uk/10.3390/rs13122267
Received: 7 May 2021 / Revised: 1 June 2021 / Accepted: 5 June 2021 / Published: 9 June 2021
On 29 December 2020, an earthquake with a magnitude of M 6.4 hit the central part of Croatia. The earthquake resulted in casualties and damaged buildings in the town of Petrinja (~6 km away from the epicenter) and surrounding areas. This study aims to characterize ground displacement and to estimate the location of damaged areas following the Petrinja earthquake using six synthetic aperture radar (SAR) images (C-band) acquired from both ascending and descending orbits of the Sentinel-1 mission. Phase information from both the ascending (Sentinel-1A) and descending (Sentinel-1B) datasets, acquired from SAR interferometry (InSAR), is used for estimation of ground displacement. For damage mapping, we use histogram information along with the RGB method to visualize the affected areas. In sparsely damaged areas, we also propose a method based on multivariate alteration detection (MAD) and naive Bayes (NB), in which pre-seismic and co-seismic coherence maps and geocoded intensity maps are the main independent variables, together with elevation and displacement maps. For training, approximately 70% of the data are employed and the rest of the data are used for validation. The results show that, despite the limitations of C-band SAR images in densely vegetated areas, the overall accuracy of MAD+NB is ~68% compared with the results from the Copernicus Emergency Management Service (CEMS). View Full-Text
Keywords: Petrinja earthquake; synthetic aperture radar; damage detection; coherence; intensity Petrinja earthquake; synthetic aperture radar; damage detection; coherence; intensity
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MDPI and ACS Style

Karimzadeh, S.; Matsuoka, M. A Preliminary Damage Assessment Using Dual Path Synthetic Aperture Radar Analysis for the M 6.4 Petrinja Earthquake (2020), Croatia. Remote Sens. 2021, 13, 2267. https://0-doi-org.brum.beds.ac.uk/10.3390/rs13122267

AMA Style

Karimzadeh S, Matsuoka M. A Preliminary Damage Assessment Using Dual Path Synthetic Aperture Radar Analysis for the M 6.4 Petrinja Earthquake (2020), Croatia. Remote Sensing. 2021; 13(12):2267. https://0-doi-org.brum.beds.ac.uk/10.3390/rs13122267

Chicago/Turabian Style

Karimzadeh, Sadra, and Masashi Matsuoka. 2021. "A Preliminary Damage Assessment Using Dual Path Synthetic Aperture Radar Analysis for the M 6.4 Petrinja Earthquake (2020), Croatia" Remote Sensing 13, no. 12: 2267. https://0-doi-org.brum.beds.ac.uk/10.3390/rs13122267

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