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Spurr volcano

stratovolcano 3374 m / 11,070 ft
Cook Inlet, SW Alaska, 61.3°N / -152.25°W
Current status: dormant (1 out of 5)
Spurr webcams / live data
Spurr volcano books
Last update: 22 Jan 2013
Typical eruption style: explosive
Spurr volcano eruptions: 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
TimeMag. / DepthDistanceLocation
Fri, 15 Dec
Fri, 15 Dec 18:38 UTCM 1.9 / 100.1 km32 km- 54km NNW of Nikiski, Alaska
Fri, 15 Dec 18:15 UTCM 1.131 km- 61km NW of Nikiski, Alaska
Wed, 13 Dec
Wed, 13 Dec 14:24 UTCM 2.4 / 106 km26 km- 64km NW of Nikiski, Alaska
Wed, 13 Dec 01:33 UTCM 1.6 / 74.3 km34 km- 66km NNW of Nikiski, Alaska
Tue, 12 Dec
Tue, 12 Dec 20:32 UTCM 1.1 / 5.9 km17 km- 100km NNW of Nikiski, Alaska
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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.

Background:

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. ...more

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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