Estimation of Building Damage from the 2024 Noto Peninsula Earthquake by Combination of Multi-Wavelength SAR

Abstract

Coherence obtained from Interferometric SAR (InSAR) analysis, a complex correlation of phase and amplitude over two time periods, serves as an indicator of interferometric properties. It is known that building damage leads to a decrease in interferometric properties.Observations capable of interferometry by the L-band ALOS-2 and the C-band Sentinel-1 satellites were conducted within a week of the disaster. This research utilized three SAR images: two before and one after the disaster, combining the decline interferometric properties by InSAR analysis with the sensitivity differences of the two wavelength SAR satellites to extract building damage.