Get our newsletter!
Voyages aux volcans actifs !
Volcanoes & Earthquakes - new app for Android
Volcanoes & Earthquakes - app for iPhone & iPad

Volcano Calendar 2020
Volcano Calendar 2020: We're proud to present our 2020 volcano calendar: 13 different and attractive images of volcanoes, volcanic landscapes and phenomena taken during volcano tours over the past two years.
Notre nouveau livre
Volcano Discoveries: "One of the most eye-catching guides to the world’s volcanoes ever published."
Voyages Volcans
VolcanoAdventures: Depuis 2005, VolcanoDiscovery propose des voyages en petits groupes, des randonnées et du trekking, ainsi que des expéditions pour voir des volcans actuellement en activité, des voyages photographiques dans de nombreuses régions d’activité volcanique à travers le monde.
Volcano Adventure Guide
The Volcano Adventure Guide: Excellent information and background for anyone wishing to visit active volcanoes safely and enjoyably. The book presents guidelines to visiting 42 different volcanoes around the world.
Départs garantis:
23 févr. - 1 mars 2020: Volcanoes of the Danakil desert - Danakil desert (Ethiopia)
4-8 mai 2020: Spécial Volcan Krakatau - Le Krakatau, détroit de la Sonde
9-17 mai 2020: Montagnes de Feu - du Stromboli à l'Etna - Eoliennes + Etna
11-29 août 2020: Kamchatka - Land of Colors - Kamchatka (Russia)
3-19 sept. 2020: Les volcans actifs de Java - Java (Indonésie)
: Places libres / : Départ garanti / : Quelques places disponibles / : Groupe fermé
Diaporama
Actualités
Great Sitkin volcano (Alaska): small steam explosion yesterday, alert raised to yellow
Monday, Jun 03, 2019
A small steam explosion occurred at the volcano yesterday morning (21:40 AKDT on 1 June local time), detected in local seismic data, the Alaska Volcano Observatory (AVO) reported. ... [details]
Great Sitkin volcano (Alaska): alert level lowered back to green
Friday, Jan 19, 2018
The recent unrest at the volcano, likely caused by a small intrusion of magma, has ended and the alert level was lowered to Green, the Alaska Volcano Observatory (AVO) reported earlier. ... [details]
 

Great Sitkin volcan

Stratovolcano 1740+ m / 5,709 ft
United States, Aleutian Islands, 52.08°N / -176.13°W
Condition actuelle: normal / en sommeil (1 sur 5) | Reports
Great Sitkin livres
Last update: 3 Jun 2019
Style éruptif tipique: unspecified
Eruptions du volcan Great Sitkin: 1974 
HeureMag. / DepthDistanceLocation
Wed, 27 Nov 2019
Wed, 27 Nov 11:48 UTCM 0.2 / 5.4 km1 km42km ENE of Adak, Alaska (USA)
Wed, 27 Nov 02:07 UTCM 0.6 / 0.5 km0 km42km ENE of Adak, Alaska (USA)
Fri, 22 Nov 2019
Fri, 22 Nov 05:34 UTCM 0.3 / 1.1 km0 km42km ENE of Adak, Alaska (USA)
Wed, 20 Nov 2019
Wed, 20 Nov 17:38 UTCM 0.3 / 3.1 km1 km41km ENE of Adak, Alaska (USA)
Wed, 13 Nov 2019
Wed, 13 Nov 21:10 UTCM 1.2 / 0.2 km1 km41km ENE of Adak, Alaska (USA)
Voir tous

Introduction:

Constructed within the caldera of an older shield volcano forming the northern half of Great Sitkin Island, 1740-m-high Great Sitkin volcano contains a small, 0.8 x 1.2 km ice-filled summit caldera. Deep glacial valleys radiate from the summit, which lies at the eastern rim of the caldera, which was formed by massive edifice failure that produced a submarine debris avalanche that traveled more than 40 km to the north. The entire island is blanketed with a light-brown to black pumice layer up to 6 m thick. This deposit is overlain over much of the NW side of the island by ash deposits from a subsidiary vent NW of the caldera. Hot springs, mud pots, and fumaroles occur near the head of Big Fox Creek, south of the volcano. Historical eruptions have been recorded since the late-19th century. In 1945, a 400-600 m wide, flat-topped lava dome was emplaced through a glacier filling the steep-sided, 180-m-deep summit caldera.
---
Smithsonian / GVP volcano information


Derniers images satellite


See also: Sentinel hub | Landsat 8
 

Plus sur VolcanoDiscovery:

Satellite images
Recent volcano satellite images: Browse quickly through the latest satellite imagery from volcanoes all over the world in order to spot ash clouds and hot spots.
Tour Classics
VolcanoDiscovery tours: A selection of our most popular trips, which we have been offering and improving over many years now: Stromboli & Etna, Santorini, Java, Ethiopia, Nyiragongo and more. Have a look!
Daily volcano map
Daily active volcano map
Active volcanoes map: Check which volcanoes are currently active (erupting). Our daily updated maps give a quick overview.
Volcano Map
Map of currently active volcanoes: See which volcanoes are erupting at the moment! Probably more than you think...
Copyright: VolcanoDiscovery ou autres sources indiquées.
Utilisation des documents: Les textes, les images et les vidéos de ce site internet sont protégées par copyright. Toute reproduction et tout usage sans accord préalable ne sont pas autorisés. Si vous désirez acquérir pour certains documents (photos, vidéos, textes ou autres) le droit de reproduction, d'édition et, plus généralement, de toute utilisation destinée à un usage public, qu'elle soit commerciale ou pas, vous êtes priés de nous contacter.