The eruption occurred from June 6-9, 1912. A summer view of Katmai Pass extends to Novarupta volcano The eruption that transformed Southwest Alaska [By Andromeda Romano-Lax] A hundred years ago, on a hot and windless June day along the Katmai coast, a strange snow began to fall. 3. 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. (VEI 6) - Composite volcanoes or stratovolcanoes: ... June 6, 1912 - Novarupta volcano erupts in Alaska, killing two people. Examples of composite volcanoes: Mount Fuji, Mount Shasta, Mount St. Helens, Mount Rainier. The largest volcanic eruption of the 20th century occurred near Katmai volcano, a stratovolcano with a caldera near its summit. Banded pumice colors the Valley of 10,000 Smokes in Katmai National Park in Southwest Alaska. This eruption was the world's largest during the 20th century and produced a voluminous rhyolitic airfall tephra and the renowned Valley of Ten Thousand Smokes (VTTS) ash flow. Photography by Mangiwau / Getty Images. | + Join mailing list Oct. 3 , 2006: In June 1912, Novarupta—one of a chain of volcanoes on the Alaska Peninsula—erupted in what turned out to be the largest blast of the twentieth century. It is the largest volcanic eruption of the 20th century. Death and property damage aren't the only consequences of composite volcanoes. At the time of the eruption little was known about the area. Moreover, they can range anywhere from 1-10 km in diameter. Resuspended volcanic ash should be considered hazardous and could be harmful to aircraft and health. Katmai Volcano – Novarupta volcano vent. The volume of volcanic ash from Novarupta was more than from all other historical Alaska eruptions combined. Novarupta, the least topographically prominent volcano in the Katmai area, was formed during a major eruption in 1912. On June 6th, 1912, Mount Katmai/Novarupta erupted on the Alaska mainland, just 250 miles (402 kilometers) southwest of Anchorage. Resuspension and transport of fine-grained volcanic ash from the Katmai National Park and Preserve region of Alaska have been observed and documented over the past several decades, but has likely been occurring ever since the 1912 Novarupta-Katmai eruption. 1912 Novarupta eruption. Because they eject matter and gases into the stratosphere, they affect weather and climate. The explosive outburst at Novarupta (Alaska) in June 1912 was the 20th century's most voluminous volcanic eruption. Semeru Volcano in Indonesia is an active stratovolcano. It is just a caldera and a lava dome, so there is no Mount in Novarupta. Novarupta-Katmai Ash Resuspension. No. Particulates released by composite volcanoes yield colorful sunrises and sunsets. 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