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: "One of the most eye-catching guides to the world’s volcanoes ever published."
: 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.
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.
: Places libres / : Départ garanti / : Quelques places disponibles / : Groupe fermé
stratovolcan 2549 m / 8,363 ft
Washington, Canada and USA (mainland), 46.2°N / -122.18°W
: normal / en sommeil
(1 sur 5)
Mount St. Helens webcams / données en temps réel
| ReportsMount St. Helens livres
Eruptions du volcan Mount St. Helens:
2004-08, 1990-91, 1989-90, 1980-86 (18 May 1980: Plinian eruption), 1921(?), 1903(?), 1898?, 1857, 1854, 1853, 1850, 1849(?), 1848, 1847, 1842-45, 1835, 1831
Style éruptif tipique:
Derniers séismes proches
Derniers images satelliteSentinel hub
| Landsat 8
Satellite images of Mt.St. Helens by (c) Google Earth View
Mt. St. Helens in Sept. 2005, seen from the N with its grand amphitheatre left by the collapse during the 18 May, 1980 eruption (photo courtesy: W Heise).
Mt. St. Helens volcano updates:
Mount St. Helens volcano (Washington, USA (mainland exept Alaska)) activity update
Saturday Apr 20, 2013 08:25 AM | AUTEUR : T
(Very) tiny earthquakes occur regularly at the volcano, but nothing suggests anything unusual going on at the volcano for the moment.
Thursday, Feb 21, 2008
During 13-19 February lava-dome growth at Mount St. Helens continued. ...
Wednesday, Feb 06, 2008
At 23-29 January lava-dome growth at Mount St. Helens continued. A steam plume that rose from the dome and slightly above the crater rim was visible on 25 January.
Saturday, Nov 03, 2007
Deformation-monitoring instruments indicated that during
24-30 October lava-dome growth at Mount St. Helens continued.
Thursday, Sep 27, 2007
From 19-25 September lava-dome growth at Mount St. Helens continued.
Friday, Sep 14, 2007
No significant changes have been registered at Mt. St. Helens. CVO's instruments monitoring the volcano indicate that the lava dome continues be active and grow slowly.
Prior to the 1980 eruption, Mount St. Helens formed a conical, youthful volcano sometimes called the Fuji-san of America. During the 1980 eruption the upper 400 m of the summit was removed by collapse of the slope, that left a 2 x 3.5 km horseshoe-shaped crater now partially filled by a lava dome. Mount St. Helens is a very young volcano and only about 40-50,000 years old.
It has been the most active volcano in the Cascade Range during the past 10,000 years, and the modern edifice was constructed during the last 2,200 years, when the volcano produced basaltic as well as andesitic and dacitic products from summit and flank vents. Historical eruptions in the 19th century were witnessed by early settlers.
USGS Cascades Volcano Observatory
St. Helens Information from the Global Volcanism Program
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