A helicopter crash in Alaska took the lives of a permafrost expert from the Netherlands, a pilot who recently transitioned from the military to fly charter helicopters and two other scientists conducting field work in the North Slope, one of the remotest regions in the U.S.

Alaska search and rescue divers recovered the bodies of a helicopter pilot and three scientists on Sunday from the sunken wreckage of their aircraft, which went down in a shallow lake last week on the remote North Slope, authorities said.

An erupting volcano in Alaska’s Aleutian Islands sent a towering cloud of ash into the air Friday, prompting the National Weather Service to issue an inflight warning to pilots.

A 7.2 magnitude earthquake triggered a brief tsunami advisory for southern Alaska late Saturday, but the advisory was canceled about an hour later, monitoring bodies reported.

The pilot of a small plane that crashed in Alaska earlier this month decided to make a forced landing after fearing the plane would not be able to safely climb over the mountainous terrain, according to a preliminary report released Thursday. Two passengers died in the crash.

A small plane that crashed in Alaska last month, killing a bush pilot who was featured on a reality TV show and a hunting guide, apparently struck a tree during takeoff from a rural airstrip, an official said Tuesday.

Backers of an effort to repeal Alaska’s ranked choice voting system violated campaign finance rules and obscured the source of their funding, including forming a church that could have allowed donors to gain tax advantages for their contributions while skirting disclosure mandates, a complaint alleges.

Attorneys general from 10 states plan to sue the U.S. Environmental Protection Agency, saying its failure to review and ensure emissions standards for residential wood-burning stoves has allowed the continued sale of appliances that could worsen pollution.

A fire broke out at a fuel dock in the south-central Alaska community of Whittier on Tuesday, injuring two people and sinking a boat.

Two people were killed and three others seriously injured when a small plane crashed shortly after taking off from a rural Alaska community over the weekend, officials said.