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Ash Over the Gulf of Alaska

Ash Over the Gulf of Alaska

On November 21, 2018, ash and volcanic gases streamed from Alaska’s Veniaminof volcano for much of the day. The Moderate Resolution Imaging Spectroradiometer (MODIS) on NASA’s Aqua satellite captured this natural-color image that day at 1:45 p.m. local time (22:45 Universal Time). The plume reached a height of 4.6 kilometers (2.9 miles) and extended roughly 400 kilometers (250 miles), according to the Alaska Volcano Observatory.

Ash emissions declined after November 21, but the volcano was still rumbling a week later as lava flowed from its ice-filled caldera. Veniaminof is one of the highest and largest volcanoes on the Alaska Peninsula. It has a steep, glacier-filled caldera that formed 3,700 years ago.

NASA Earth Observatory image by Adam Voiland, using MODIS data from NASA EOSDIS/LANCE and GIBS/Worldview. Caption by Adam Voiland.

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