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Novarupta

Caldera · United States · 841 m

A lava dome 65 m high and 380 m wide lies within a circular ejecta ring and caps the 1912 vent of Novarupta volcano. A 60-hour-long eruption that began on 6 June 1912 was the largest eruption during the 20th century, producing The Valley of Ten Thousand Smokes pyroclastic flow deposit which forms the flat ground to the right. The face of Falling Mountain, behind Novarupta dome, was sheared off by a 2-km-wide collapse around the vent. This view from the NE shows snow-capped Mageik in the background.
A lava dome 65 m high and 380 m wide lies within a circular ejecta ring and caps the 1912 vent of Novarupta volcano. A 60-hour-long eruption that began on 6 June 1912 was the largest eruption during the 20th century, producing The Valley of Ten Thousand Smokes pyroclastic flow deposit which forms the flat ground to the right. The face of Falling Mountain, behind Novarupta dome, was sheared off by a 2-km-wide collapse around the vent. This view from the NE shows snow-capped Mageik in the background. · Foto: Photo by Tom Miller (Alaska Volcano Observatory, U.S. Geological Survey). · Wikimedia Commons
Tipo
Caldera
País
United States
Región
América del Norte / Alaska Peninsula Volcanic Arc
Altitud
841 m
Coordenadas
58.266, -155.159
Última erupción
1912
Contexto tectónico
Subduction zone / Continental crust (> 25 km)
Forma volcánica
Caldera
Roca principal
Rhyolite
Resumen geológico

Novarupta, the least topographically prominent volcano in the Katmai area, was formed during a major eruption in 1912. 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. At the end of the eruption a small, 65-m-high, 400-m-wide lava dome grew within the source vent of the VTTS ashflow, a 2-km-wide area of subsidence NW of Trident volcano. The NE side of the Falling Mountain lava dome of the Trident volcanic cluster, as well as Broken Mountain and Baked Mountain, was removed by collapse of the Novarupta depression, which is marked by radial and scalloped arcuate fractures. Much larger collapse took place at Katmai volcano, 10 km E, where a 3 x 4 km caldera formed in response to magma reservoir drainage toward Novarupta.

Resumen de Wikipedia

Resumen en inglés

Novarupta is a volcano located on the Alaska Peninsula on a slope of Trident Volcano in Katmai National Park and Preserve, about 290 miles (470 km) southwest of Anchorage. Novarupta was formed in 1912, during the largest volcanic eruption of the 20th century, in which it released 30 times the volume of magma of the 1980 eruption of Mount St. Helens.

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Historial de erupciones

Resumen (VEI en el tiempo)
Haga clic en una barra para ver erupciones individuales
1912~1912 · 1 erupciones · VEI máx. 619121912191319131913

Línea de tiempo detallada

  1. 1912VEI 6Observado
    1912-06-06 – 1912-10-16

Enlaces externos

⚠ Solo como referencia. No apto para respuesta ante emergencias.