Sulfur dioxide (SO2) is a common volcanic gas that is released from magma within Earth’s upper crust. While SO2 is commonly released from Alaska’s active volcanoes, including Korovin, a recent increase in satellite detections of SO2 emissions from Korovin may be a sign of volcanic unrest. In sufficient quantity, SO2 can be readily measured from space due to its low quantity in background air. This image shows SO2 emissions from Korovin that were detected by the TROPOMI satellite sensor on October 26, 2020. In this image, the warmer colors represent larger quantities of SO2 measured within a column of atmosphere. These SO2 column densities are reported in Dobson Units (DU) where 1 DU = 2.85 x 10^-2 g of SO2/m^2. AVO will continue to monitor satellite detections of SO2 from Korovin, in combination with other volcano monitoring techniques, to evaluate ongoing activity at Korovin volcano.
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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