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Agrigan volcano

Stratovolcano 965 m / 3,166 ft
Mariana Islands, USA, 18.77°N / 145.67°E
Current status: normal or dormant (1 out of 5) | Reports
Agrigan volcano books
Last update: 25 ene 2013
Typical eruption style: sin especificar
Erupciones del volcán Agrigan: 1917 No hay terremotos recientes
Fecha / HoraRevista / ProfundidadDistanciaUbicación
Agrigan volcano is an active stratovolcano and the highest of the volcanoes in the Marianas volcanic arc. It contains contains a 500-m-deep, flat-floored caldera. The last confirmed eruption was in 1917.

Background:

The highest of the Marianas arc volcanoes, Agrigan contains a 500-m-deep, flat-floored caldera. The elliptical island is 8 km long; its 965-m-high summit is the top of a massive 4000-m-high submarine volcano, the second largest in the Marianas Islands. Deep radial valley dissect the flanks of the thickly vegetated stratovolcano. The elongated caldera is 1 x 2 km wide and is breached to the NW, from where a prominent lava flow extends to the coast and forms a lava delta. The caldera floor is surfaced by fresh-looking lava flows and also contains two cones that may have formed during the volcano's only historical eruption in 1917. This eruption deposited large blocks and 3 m of ash and lapilli on a village on the SE coast, prompting its evacuation.
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Smithsonian / GVP volcano information


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