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Actualités
Tuesday, Jan 22, 2013
Seismicity continues to be slightly elevated. ... lire toutes
Monday, Jan 21, 2013
Seismic recording at Mt Spurr volcano (CKT station, AVO)
Small local earthquakes continue to appear on seismic recordings. ... lire toutes
Carte de la ubication du volcan Mt Spurr en Alaska (carte: Janet Schaefer, Alaska Volcano Observatory / USGS)
Carte de la ubication du volcan Mt Spurr en Alaska (carte: Janet Schaefer, Alaska Volcano Observatory / USGS)
 

Spurr volcan

stratovolcan 3374 m / 11,070 ft
Cook Inlet, SW Alaska, 61.3°N / -152.25°W
Condition actuelle: normal / en sommeil (1 sur 5)
Spurr webcams / données en temps réel | Reports
Spurr livres
Last update: 22 Jan 2013
Style éruptif tipique: explosive
Eruptions du volcan Spurr: 1992 (Crater Peak), 1965 (?, Spurr), 1953 (Crater Peak)
tephrochronology and radiocarbon dated: 1650 ± 50 years, 3250 BC ?, 4050 BC ?, 5110 BC ± 100 years, 6050 BC
HeureMag. / DepthDistanceLocation
Wed, 12 Aug 2020
Wed, 12 Aug 02:24 UTCM 0.3 / 6 km18 km67 km W of Tyonek, Alaska (USA)
Thu, 6 Aug 2020
Thu, 6 Aug 09:53 UTCM 0.7 / 5.2 km15 km57 km W of Tyonek, Alaska (USA)
Tue, 4 Aug 2020
Tue, 4 Aug 05:26 UTCM 1.413 km68 km WNW of Beluga, Alaska (USA)
Sun, 2 Aug 2020
Sun, 2 Aug 14:11 UTCM 0.8 / 91.6 km26 km40 km WNW of Tyonek, Alaska (USA)
Sat, 1 Aug 2020
Sat, 1 Aug 22:48 UTCM 1.8 / 109.6 km24 km62 km W of Tyonek, Alaska (USA)
Voir tous
Mt Spurr volcano is the highest volcano in the Aleutian Volcanic Arc. the glacier-covered stratovolcano is located 130 km west of Anchorage and NE of Chakachamna Lake.
Mt Spurr had a violent sub-plinian eruption in 1992 and a large eruption in 1953, both ranking at VEI 4 and produced by Crater Peak, a small flank vent on the south side. No other historic eruptions have been documented.

Introduction:

The 3374-m-high summit of Mount Spurr, the highest volcano of the Aleutain arc, is a large lava dome constructed at the center of a roughly 5-km-wide horseshoe-shaped caldera that is open to the south.
The caldera was formed by a late-Pleistocene or early Holocene debris avalanche and associated pyroclastic flows that destroyed an ancestral Spurr volcano. The debris avalanche traveled more than 25 km to the SE, and the resulting deposit contains blocks as large as 100 m in diameter. Several ice-carved post-caldera cones or lava domes lie in the center of the caldera. The youngest vent, 2309-m-high Crater Peak, formed at the breached southern end of the caldera and has been the source of about 40 identified Holocene tephra layers. Spurr's two historical eruptions, from Crater Peak in 1953 and 1992, deposited ash on the city of Anchorage.
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from: Smithsonian / GVP Mt Spurr volcano information

1992 eruption
A large, subplinian eruption occurred in 1992 at Mt Spurr volcano. There were 3 main explosions, on 27 June, 18 August and 16-17 September. The eruption produced ash columns up to 13.5 km high and ashfall in several hundred km distance. ...plus

1953 eruption
A VEI 4 explosive eruption occurred at Crater Peak from 9-16 July 1953. It produced major ash fall (up to 6 mm in Anchorage) and lahars on the flanks and the base of the volcano.

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