Shishaldin has been on orange alert for several months but new activity has observes watching carefully.
There has been some new activity at Mount Shishaldin. The Alaska Volcano Observatory upgraded the volcano to an orange status several months ago, but as geologist at AVO Chris Waythomas says Shishaldin started acting differently Sunday night.
“We detected an escalation in seismic activity that suggested the volcano had increased its level on unrest.”
Waythomas says there has been no ash emission thus far from Shishaldin but that volcano is known for producing huge ash plumes as high as 20,000 feet.
“But there are some very strong thermal signals detected at the summit, suggesting that there may have been some emission of hot material blocks or flows on the upper flanks.”
Shishaldin is one of the most active volcanoes in Alaska.