From ABC News: An Alaskan volcano that has been inactive for more than 100 years is showing signs of rumbling, according to scientists.
However, there’s a chance that the activity could be signs of a pending avalanche, rather than a volcanic eruption, NASA said.
The Iliamna volcano, located near the Cook Inlet in southern Alaska, last erupted in 1867, but would still rumble every few years due to avalanches large enough to register on nearby seismic and infrasound instruments, according to NASA.
The Alaska Volcano Observatory reported a “flurry of shaking” in the region recently. On June 15, seismic activity increased for several hours, the observatory said.
The Landsat 8 satellite, launched on February 11, 2013 and operated by the U.S. Geological Survey (USGS), has an Operational Land Imager (OLI). The OLI captured an image of the volcano on June 10, before the rumblings began. The seismic activity resembled the initial slipping between rock and ice that preceded large avalanches on the volcano in the past, the AVO said.
Iliamna experiences massive avalanches due to glacial ice weakened rock and volcanic heat, scientists say.
Note that this change is UNRELATED to activity at Mount Spurr. Iliamna is located further south on the western side of Cook Inlet.#Alaska #volcano @USGSVolcanoes @UAFGI @akdggs
— Alaska AVO (@alaska_avo) July 1, 2025
What’s Shaking Alaska?! Welcome to your weekly seismic update from across the state, brought to you by the Alaska Earthquake Center, where we monitor ground shaking 24/7.
Over the past week, we recorded over 350 earthquakes. The largest was a magnitude 4.4 east of Iliamna… pic.twitter.com/Lq61nWBjcl— Alaska Earthquake Center (@AKearthquake) July 9, 2025
The Iliamna volcano in southern Alaska, which has been inactive for more than 100 years, is showing signs of rumbling, according to scientists. https://t.co/tYiAa6GuTZ pic.twitter.com/MNbmIgg4Tc
— ABC News (@ABC) July 13, 2025
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