Scientists record explosion at Alaska's Cleveland Volcano; no ash detected above clouds
{{#rendered}} {{/rendered}}The Alaska Volcano Observatory says underground activity is increasing at Cleveland Volcano in the Aleutians Islands.
The observatory recorded an explosion at the volcano at 8:17 a.m. Tuesday, but no ash has been detected. Ash above 20,000 feet would threaten trans-Pacific flights.
The volcano is located on an uninhabited island 940 miles southwest of Anchorage. Its last significant eruption began in February 2001.
{{#rendered}} {{/rendered}}In the last 14 years, Cleveland Volcano has occasionally produced small lava flows and explosions with small ash clouds below 20,000 feet.