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News
viernes, ene 25, 2013
En una imagen de satélite del 22 de enero, centro asesor de la NOAA Washington Volcanic Ash vio una nube volcánica posible del volcán Agrigan, situado en la isla volcánica próxima al norte de pagano (Mariana Isl). ... [Leer más]
 

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
Fecha / HoraRevista / ProfundidadDistanciaUbicación
Thu, 20 Dec
Thu, 20 Dec 15:32 UTCM 4.5 / 242.4 km33 km- 30km WNW of Agrihan, Northern Mariana Islands
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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