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Novarupta slideshow

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Valley of 10,000 Smokes, Katmai National Park, River Lethe, Novarupta

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Strong Winds Stir up Ash from Novarupta, 1912 Alaska Volcano Eruption

Gusty winds swept through Kodiak Island, Alaska on Tuesday evening disrupting ash from the 1912 Novarupta volcano. The National Weather Service said strong winds and a lack of snow helped stir up the volcano ash and prompted flight warnings for the area. The ash was lifted to about 4,000 feet and drifted over the Shelikof Straight and Kodiak Island.
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100 years ago, Novarupta, a volcano in Alaska, produced what is believed to be the most powerful volcanic eruption of the 20th Century.

"People in Juneau, Alaska, about 750 miles from the volcano, heard the sound of the blast - over one hour after it occurred."



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The largest eruption of the 20th century occurred in 1912, from June 6 to June 8, to form Novarupta. Rated a 6 on the volcanic explosivity index,  the 60 hour long eruption expelled 13 to 15 cubic kilometres of magma, 30 times as much as the 1980 eruption of Mount St. Helens.
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Does anyone know if there are any photos of Mount Katmai before  the 1912 eruption of Novarupta and the following collapse of Katmai?

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The eruption of Novarupta in Alaska

The largest eruption of the 20th century occurred in 1912, from June 6 to June 8, to form Novarupta. Rated a 6 on the volcanic explosivity index,  the 60 hour long eruption expelled 13 to 15 cubic kilometres of magma, 30 times as much as the 1980 eruption of Mount St. Helens.
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Novarupta, meaning "new eruption", is a volcano located on the Alaska Peninsula in Katmai National Park and Preserve, about 470 km southwest of Anchorage. Formed in 1912 during one of the largest volcanic eruptions of the 20th century, Novarupta released 30 times the volume of magma as the 1980 eruption of Mount St. Helens.

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Novarupta Volcano
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Fierstein and Hildreth (2001) provide information about the magnitude of the 1912 eruption at Novarupta and Katmai: "The world's largest volcanic eruption of the 20th century broke out at Novarupta  in June 1912, filling with hot ash  what came to be called the Valley of Ten Thousand Smokes and spreading downwind more fallout  than all other historical Alaskan eruptions combined.

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In June 1912, Novaruptaone of a chain of volcanoes on the Alaska Peninsulaerupted in what turned out to be the largest blast of the twentieth century. It was so powerful that it drained magma from under another volcano, Mount Katmai, six miles east, causing the summit of Katmai to collapse to form a caldera half a mile deep. Novarupta also expelled three cubic miles of magma and ash into the air, which fell to cover an area of 3,000 square miles more than a foot deep.
Despite the fact that the eruption was comparable to that of the far more famous eruption of Krakatau in Indonesia in 1883 and so near the continental United States, it was hardly known at the time because the area was so remote from English-speaking people.

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Landsat Image of the Novarupta and Katmai Caldera - 1990

Novarupta
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Credit NASA

Latitude: 58°160N, Longitude: 155°924W


Novarupta, meaning "new eruption", is a volcano located on the Alaska Peninsula in the Katmai area, about 290 miles southwest of Anchorage. Novarupta sits below Mount Katmai. Its eruption of June 6June 8, 1912, was ten times more powerful than the 1980 eruption of Mount St. Helens and led to the formation of this 841 m volcano.
The 1912 Novarupta eruption was the largest volcanic eruption of the 20th century. About 15 km³ of volcanic material was ejected over two and a half days. The 1815 eruption of Tambora however, had displaced about seven times as much material. The 1883 eruption of Indonesia's Krakatoa displaced twice as much as Novarupta. Novarupta's 1912 eruption has been rated a 6 on the Volcanic Explosivity Index. Magma from underneath the Mount Katmai area was drained away to Novarupta, resulting in a collapsed 3 × 4 km caldera.

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