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Diaporama
Actualités
Earthquakes under Mount St. Helens volcano during 1988-2016; magmatic recharge swarms are marked, along with the most recent earthquake swarm. (image: USGS / Cascade Volcano Observatory via Eruptions Blog)
Tuesday, May 10, 2016
Since the beginning of 2016, a swarm of small earthquakes has been occurring at under the volcano, suggesting that another phase of magma recharge is currently taking place. ... [details]
Saturday, Apr 20, 2013
(Very) tiny earthquakes occur regularly at the volcano, but nothing suggests anything unusual going on at the volcano for the moment. [details]
 

Volcans en Washington (10 volcans)

Glacier Peak| Goat Rocks| Indian Heaven | Mount Adams| Mount Baker| Mount Rainier| Mount St. Helens| Signal Peak| Simcoe| West Crater
Glacier Peak
(stratovolcan)
Glacier Peak is a stratovolcano in northern Washington and the most remote of the Cascade volcanoes. Its name comes from the 11 glaciers on its flanks.
Although it reaches more than 10,000 feet elevation, the volcanic edifice is only 500-1000 m high, because the volcano's b... [informations]

Goat Rocks
(stratovolcan)
Goat Rocks is the center a deeply eroded, glaciated volcanic center of a volcanic field 30 km (18 miles) north of Mount Adams, Washnington, USA. [informations]

Indian Heaven
(shield volcanoes)
Indian Heaven volcano is a volcanic field 30 km halfway between Mt St. Helens and Mount Adams volcano, Washington, USA. It contains several low overlapping basaltic shield volcanoes and more than 50 flank vents with spatter cones primarily oriented along a N-S line.
The you... [informations]

Mount Adams
(stratovolcan)
Mt Adams stratovolcano 50 km east of Mt St Helens volcano is the by volume second largest volcano of the Cascades Range, after Mt. Shasta.
Mount Adams is the center of a 200 km3 volcanic field. The andesitic-dacitic volcano was built by several overlapping cones. It is elon... [informations]

Mount Baker
(stratovolcan)
Mt Baker 50 km east of Bellingham, Washington, is the northernmost of Washington's volcanoes and one of the lesser known ones in the Cascade Range.
Mt Baker Volcano has been very active during the last centuries, but has been in repose now for more than 130 years.
Ear... [informations]

Mount Rainier
(stratovolcan)
Mount Rainier, the highest peak in the Cascade Range, is located 87 km SE of Seattle and forms a majestic backdrop to the landscape of the region. The volcano is covered by 26 main glaciers, and melting of glacial ice by a future eruption causing lahars are a significant hazard f... [informations]

Mount St. Helens
(stratovolcan)
Mount St Helens volcano hardly needs introduction. In its spectacular eruption in 1980, it placed itself deep into collective memory, in particular within the NW states of the USA. Prior to this eruption and its gradual reawakening, little attention had been given to the volcanic... [informations]

Signal Peak
(volcan bouclier )
Signal Peak is the eroded remnant of a small andesitic stratovolcano overlying the southern part of the basaltic shield of the Lincoln Plateau.
Together with still active Mount Adams volcano to the west and the older Simcoe volcanic field of cinder cones to the east, it is ... [informations]

Simcoe
(champ volcanique)
Simco volcanic field is a N-S aligned cluster of 24 monogenetic cinder cones. It is located E and SE of Mt Adams, Washington, California, near the town of Goldendale.
Associated is the younger basaltic Lincoln Plateau with Signal Peak at the western end of the field and ea... [informations]

West Crater
(champ volcanique)
West Crater volcano is a small andesitic lava dome with lava flows in southern Washington, belonging to a volcanic field extending from Marble Mountain, north of Swift Reservoir, to south of Trout Creek Hill. The field consists mainly of small basaltic and basaltic andesite cinde... [informations]
 

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