Document Type : Original Article

Abstract

Earthquakes are among the natural hazards that can have significant impacts. Although earthquakes occur within just a few seconds, their effects can persist in the environment for years, or even decades. Earthquakes cannot be predicted in the long term, but space technologies, such as radar remote sensing, can play a crucial role in reducing earthquake risks and losses. In this study, Synthetic Aperture Radar (SAR) images from the ALOS-2 satellite, known as PALSAR-2, operating in the L-band, were used to assess the damage to buildings and road infrastructure resulting from the January 1, 2024, Noto earthquake in Japan. Interferometric Synthetic Aperture Radar (InSAR) and Coherence analyses have been used in this study. The results show that L-band data, with a wavelength of approximately 24 centimeters, have good penetration capability in areas with dense and tall vegetation cover (such as the Noto Peninsula). This advantage can be utilized to extract ground displacement fields and assess damage to buildings and roads in which the results show that the maximum displacement is about 1 meter in the line of sight of satellite.

Keywords

• Earthquake
• Hazard
• SAR Remote Sensing
• ALOS-2
• Coherence

Main Subjects

• Remote sensing and Gis