Observing Near-Real-Time Volcanoes Deformation Using InSAR – Time Series of LiCSBAS in Indonesia

Abstract The Synthetic Aperture Radar (SAR) sensors onboard satellites are leading in advance to monitor physical changes of volcano edifices such as deformation. A few days temporal resolution imageries provided by Sentinel-1 SAR make it possible volcanoes worldwide near-real-time monitoring. constellation produces a large amount images valuable for monitoring deformation and hazard mitigation. However, processing the Interferometric (InSAR) dataset is time-consuming requires high-performance computers. Overcoming problem, Center Observation & Modelling Earthquakes, Volcanoes Tectonics (COMET) created program called Looking Inside Continents from Space Sentinel (LiCSAR) integrated InSAR time-series analysis LiCSBAS process calculate interferogram time series efficiently. This study presents observation volcanic activities at Mts. Sinabung Agung North Sumatra Bali, respectively. We have observed both 2015 2022. analyzed 1824 848 interferograms Mt. Agung, was successfully processed despite being located under tropics. Velocity dominated uplift around summit, consistent with measurement Volcanology Geological Hazard Mitigation (CVGHM). In period January March 2017, lava dome using laser distance meter showed an increase 1.2 Mm 3 1.7 , while detected movement 14 mm. On contrary, summit mm/yr indicate uplift, subsidence crater.