ANALYZING THE IMPACT OF LOW-TO-MODERATE EARTHQUAKE IN KON TUM, VIETNAM BY TIME-SERIES SENTINEL-1A

In 2021 and 2022, the province of Kon Tum in Vietnam had a number of low-to-moderate earthquakes with magnitudes between 2.5 and 4.8 on the Richter scale. The primary causes of these earthquakes are geological activity and hydroelectric development projects in the area. The DInSAR technique is primary tool for monitoring the earthquakes, volcano. Sentinel-1 satellite images, which are openly accessible for a period of 12 days, are currently the main source of data for monitoring surface displacement. In this work, we use time-series Sentinel-1A images and Persistent Scatterer Interferometry (PSInSAR) techniques to analyze and assess the effects of low to moderate earthquakes in Kon Tum. The Sentinel-1A images were used from April 2021 to July 2022. According to the data, the Kon Tum area had a mean displacement velocity of -21.3 mm to 20.3 mm per year between 2021 and 2022. There has been an abnormal displacement and subsidence of approximately 40 mm, particularly in the area that is near the epicenter location. © 43rd Asian Conference on Remote Sensing, ACRS 2022.