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Alaska's Prow Knob Becomes Island Amid Glacier Retreat

9/12/2025

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Summary

Story summary

Prow Knob in southeastern Alaska has become an island following the retreat of the Alsek Glacier, as confirmed by NASA satellite images.
This separation occurred between July 13 and August 6, 2025, significantly altering the landscape.
Once surrounded by ice, Prow Knob now sits in the expanded Lake Alsek.
Historical data indicates the glacier has been retreating since at least 1984.
Scientists will monitor Prow Knob to study climate change effects in Alaska.

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Story summary

Prow Knob in southeastern Alaska has become an island following the retreat of the Alsek Glacier, as confirmed by NASA satellite images.
This separation occurred between July 13 and August 6, 2025, significantly altering the landscape.
Once surrounded by ice, Prow Knob now sits in the expanded Lake Alsek.
Historical data indicates the glacier has been retreating since at least 1984.
Scientists will monitor Prow Knob to study climate change effects in Alaska.