Several Small Collapses as Summit Lava Lake Slowly Drops

Summit deflation over the past day was associated with the summit lava lake level slowly dropping.

Solidified lava, attached to the Overlook crater walls, collapsed into the lake on several occasions today, triggering small dust plumes and agitation of the lake surface.

Solidified lava, attached to the Overlook crater walls, collapsed into the lake on several occasions today, triggering small dust plumes and agitation of the lake surface.

When this happens, collapses commonly occur within the Overlook crater.

“Summit deflation continued over the past day, with the lava lake level slowly dropping. The dropping lava level triggered several small collapses within the Overlook crater. These small rockfalls impacted the lake and caused brief spattering and agitation of the lake surface. This morning, the lake was roughly 80 meters (260 ft) below the Overlook crater rim. Summit sulfur dioxide emission rates ranged from 1,500 to 4,300 metric tons per day during the 2-week period ending September 30.”

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