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Scientists lower Alaska volcano threat level

Scientists lower Alaska volcano threat level

Alaskans can put away their dust masks and spare air filters, for now, because Mount Redoubt seems to have cooled off since its last major eruption nearly three months ago.
The Alaska Volcano Observatory said Tuesday that seismic activity has slowed under the volcano and it's possible that eruptions have stopped. The observatory lowered its alert levels for the mountain 106 miles (170 kilometers) southwest of Anchorage.
A series of eruptions beginning in March disrupted air traffic and dusted Anchorage, the Kenai Peninsula and Gov. Sarah Palin's hometown of Wasilla with volcanic ash. Based on past events, geologists said eruptions could last for months, but Redoubt's last significant blast was April 4.
Over the last three months, volcanic activity continued with the growth of a lava dome. The bubble measures nearly 3,300 feet (1,005 meters) long, 1,500 feet (457 meters) wide and 656 feet (200 meters) tall _ partly filling an old crater from a previous eruption.
The dome grew from lava flowing out of the mountain and magma pushing up from below, Bierma said, but growth has slowed significantly.
"There hasn't been much change noted since early June," he said.


Updated : 2020-12-06 06:33 GMT+08:00