As a precaution, scientists have stopped accessing the site of the Barry Arm landslide by water after part of the slope started creeping downhill faster. A major landslide into the water could generate a dangerous tsunami.
from the state Department of Geological and Geophysical Surveys, the slope is moving faster than it has since 2020, at a rate of 1.6 to 2.7 inches per day — and the area that’s moving is directly above the water.“In the last month and a half here, there have been these accelerations of particularly one portion of that mass,” he said. “So that could be a sign of impending failure.”Unfortunately, the new data doesn’t tell researchers when a failure might occur.
“That makes it really difficult to message,” Higman said. “Because we don’t want to be in the position where we see something scary but we don’t say anything, because we don’t know how scary it is. But we also don’t want to say, ‘Well, we saw something, we’re all terrified and nobody should go there.’ Because we don’t really know if it’s that bad.
A separate landslide at the Ellsworth Glacier last week released an estimated mass of 10 million tons — making it 100 times larger than the landslide at Lowell Point Road this spring, Higman said. While scientists are watching the slide at Barry Arm closely, it’s not the only unstable slope in the area. In much of coastal Alaska, glacial retreat has left slopes exposed, unstable and more prone to failure.
Higman said he’s monitoring hundreds of others. Just last Wednesday, there was a landslide at the Ellsworth Glacier near Seward, which Higman said sent an estimated 10 million tons of material sliding. The material did not hit the water. He said even if it had, it’s remote enough that it wouldn’t have had any human impacts.KDLL is our partner station in Kenai. KTOO collaborates with partners across the state to cover important news and to share stories with our audiences.
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