InSAR-derived ground surface change at Aniakchak volcano based on Sentinel-1 SAR acquisitions between February 27 and March 23, 2023. Colors in the main map show cumulative displacement in the satellite line-of-sight (LOS) direction (uplift of the ground surface toward the satellite) up to 6 inches (15 cm) over the 24-day observation period within the caldera. Point labeled "a" on the map marks the location for which the time series inset shows the evolution of the displacement over three satellite acquisitions. The deformation was also detectable earlier, between February 3 and 27, 2023, but cannot be resolved in this figure due to poor data quality from snow cover. Fitting a line results in a rate of displacement of ~4 cm (1.6 in) per week over this time span.
Image courtesy of the AVO/UAF-GI.
Please cite the photographer and the Alaska Volcano Observatory / University of Alaska Fairbanks, Geophysical Institute when using this image.
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