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Erin Lysne using a GPS unit to measure the advancing front of Crater Glacier at Mount St. Helens in June of 2024.

By Cascades Volcano Observatory
Erin Lysne using a GPS unit to measure the advancing front of Crater Glacier at Mount St. Helens in June of 2024.
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Erin Lysne using a GPS unit to measure the advancing front of Crater Glacier at Mount St. Helens in June of 2024.   

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Public Domain.

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