This image shows the ground surface deformation (inflation at the volcanic center) at Akutan during 2014. Black arrows represent how the GPS stations moved horizontally and red arrows show their vertical movement. The white arrows show what we would expect the GPS movement to be for magma accumulating at a point 7 km (4 mi) below the surfave at the location maked by the black star, near the center of the island. The green arrow shows the scale of the arrows. This particular episode of ground deformation did not result in an eruption. Figure by Jeff Freymueller, Michigan State University, July 23, 2014.
Volcano(es): Akutan
Photographer: Freymueller, Jeff
URL: avo.alaska.edu/image/view/194401
Akutan non-eruptive activity 2005
From Cameron and others, 2023: "In 2018, Akutan Volcano continued its long-term reinflation, which AVO has recorded since the installation of a GPS network at the volcano in 2005. The deformation was slightly faster in 2018 compared to its long-term rate. DeGrandpre and others (2017) noted that inflation at Akutan Volcano is episodic and suggested a shallow magma reservoir resides 6-10 km [3.7-6.2 mi] beneath the volcano. Continued inflation of the volcano is consistent with an ongoing accumulation of magma at shallow levels. The Aviation Color Code and Volcano Alert Level for the volcano remained at GREEN and NORMAL throughout 2018."
From Orr and others, 2023: "In prior years, activity at Akutan Volcano was characterized by a pattern of long-term reinflation, first observed after AVO field crews installed a Global Positioning System (GPS) network on the volcano in 2005. In 2019, however, the volcano deviated from this long-term trend by showing no systematic deformation that could be confidently linked to a volcanic source."
Use Restriction: Please cite the photographer when using this image.
Full Resolution.