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Diaporama
Friday, Sep 14, 2012
An M 2.4 earthquake occurred beneath the summit of Mount Rainier at 08:45 PDT, September 13, and was followed by a dozen or so aftershocks over the next ~20 minutes. ... [details]
 

Mount Rainier volcan

stratovolcan 4329 m / 14,409 ft
Washington, USA, 46.85°N / -121.76°W
Condition actuelle: en sommeil (1 sur 5)
Mount Rainier webcams / live data
Mount Rainier volcano books
Last update: 3 Jul 2013 (M 2.4 shallow earthquake beneath the north rim of East Crater on 13 Sep)
Style éruptif tipique: Explosive
Eruptions du volcan Mount Rainier: 1894, 1882(?), 1879(?), 1870(?), 1858(?), 1854(?), 1843(?), 1825(?), 300 BC, 520±200 BC, 3400 BC, 3600 BC, 3650 BC, 4400 BC, 4900 BC, 5300 BC, 5400 BC, 6800 BC
HeureMag. / DepthDistanceLocation
Mon, 21 Aug
Mon, 21 Aug 07:16 UTCM 0.9 / 8.3 km38 km- 2km SSE of Morton, Washington
Sat, 19 Aug
Sat, 19 Aug 15:29 UTCM 0.5 / 3 km18 km- 20km E of Eatonville, Washington
Fri, 18 Aug
Fri, 18 Aug 17:18 UTCM 0.7 / 1.2 km36 kmExplosion - 4km S of Morton, Washington
Fri, 18 Aug 08:10 UTCM 1.1 / 11.2 km19 km- 19km E of Eatonville, Washington
Thu, 17 Aug
Thu, 17 Aug 14:09 UTCM 1.0 / 1.8 km22 kmExplosion - 36km NNE of Packwood, Washington
Voir tous
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 for the region.
Reported 19th-century eruptions can not be verified by any deposits, but it is likely that some phreatic activity took place in 1894.
Previous eruptions have produced large debris avalanches and lahars, some of which have traveled all the way to the Pacific Ocean and reached Puget Sound.

Introduction:

Mount Rainier is a typical andesitic stratovolcano. It has produced large lahars and debris avalanches. Its present summit was built within a large crater breached to the northeast formed by collapse of the volcano during a major explosive eruption about 5600 years ago, that produced the widespread Osceola Mudflow.
Mt Rainier's eruptive history has been studied in detail. It includes about a dozen major eruptions during the past 2600 years, the largest of which occurred about 2200 years ago.
The present-day summit cone is cut by two overlapping craters. Extensive hydrothermal activity is present in the summit craters. It has produced melting of glacial ice created a complex system of steam caves found in the summit icecap.

Mount Rainier Photos:




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