Increased earthquake activity has prompted scientists to raise the alert level for an Alaska volcano.
Alaska Volcano Observatory officials on Friday elevated the alert status for Iliamna Volcano, located on the west side of Cook Inlet, from its previous “normal” alert level to “advisory.” Officials also changed the aviation color code from green to yellow.
Earthquake activity has been increasing at the volcano over the last three months and is above background level. While a significant change, they say it's not certain if the earthquake activity is because of magna movement.
This doesn't mean an eruption is imminent, and could be similar to earthquake activity from September 1996 to February 1997 that didn't result in an eruption.
The observatory this week said there was a small eruption at Cleveland Volcano, located about 940 miles southwest of Anchorage.