Alaska Volcano Observatory

Figure shows GNSS timeseries for stations SPCP (left) and SPBG (right) at Mt. Spurr from Jan-01-2023 until May-15-2024 in east, north and vertical components (top to bottom rows). SPCP is located southeast of Spurr (east of Crater Peak) and SPBG at approx. the same distance SW of Spurr (west of Crater Peak). Each blue dot shows how the distance between the station changes relative to GNSS station AC17, southwest of Spurr and not moving during this time; whiskers show the uncertainty. Orange dots are position estimates based on rapid orbit products. Vertical Black bars mark the approximate onset of inflation end of Nov / beginning of Dec 2023, after which SPCP moves southeast and SPBG southwest, away from the volcano and both move up. This motion is consistent with inflation of the volcano / pressure increase.

Credit: Image courtesy of the AVO/UAF-GI.
Use Restriction: Please cite the photographer and the Alaska Volcano Observatory / University of Alaska Fairbanks, Geophysical Institute when using this image.
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