During the ~60 hour 1912 eruption of Novarupta Volcano, now within Katmai National Park and Preserve, on the Alaska Peninsula, ~30-40 cm of tephra fell onto Kodiak Island, ~ 100 mi east of the origin of the eruption. Shown here, decades later, this ash fall remains as a ~40 cm thick unit under just a few centimeters of post-1912 organics.
Image courtesy of AVO/USGS.
Please cite the photographer and the Alaska Volcano Observatory / U.S. Geological Survey when using this image.
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