Glacier-Volcano Interactions in the North Crater of Mt Wrangell, Alaska
Glaciological and related observations from 1961 to 2005 at the summit of Mt Wrangell (62.00° N, 144.02° W; 4317 m a.s.l.), a massive glacier-covered shield volcano in south-central Alaska, show marked changes that appear to have been initiated by the Great Alaska Earthquake (Mw = 9.2) of 27 March 1...
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Online Access: | https://digitalcommons.usf.edu/geo_facpub/317 https://doi.org/10.3189/172756407782282462 |
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ftusouthflorida:oai:digitalcommons.usf.edu:geo_facpub-1316 2023-07-30T04:03:35+02:00 Glacier-Volcano Interactions in the North Crater of Mt Wrangell, Alaska Benson, Carl Motyka, Roman McNutt, Stephen R. Lüthi, Martin Truffer, Martin 2007-10-01T07:00:00Z https://digitalcommons.usf.edu/geo_facpub/317 https://doi.org/10.3189/172756407782282462 unknown Digital Commons @ University of South Florida https://digitalcommons.usf.edu/geo_facpub/317 doi:10.3189/172756407782282462 https://doi.org/10.3189/172756407782282462 School of Geosciences Faculty and Staff Publications Earth Sciences article 2007 ftusouthflorida https://doi.org/10.3189/172756407782282462 2023-07-13T21:43:05Z Glaciological and related observations from 1961 to 2005 at the summit of Mt Wrangell (62.00° N, 144.02° W; 4317 m a.s.l.), a massive glacier-covered shield volcano in south-central Alaska, show marked changes that appear to have been initiated by the Great Alaska Earthquake (Mw = 9.2) of 27 March 1964. The 4 × 6 km diameter, ice-filled Summit Caldera with several post-caldera craters on its rim, comprises the summit region where annual snow accumulation is 1–2 m of water equivalent and the mean annual temperature, measured 10 m below the snow surface, is −20°C. Precision surveying, aerial photogrammetry and measurements of temperature and snow accumulation were used to measure the loss of glacier ice equivalent to about 0.03 km3 of water from the North Crater in a decade. Glacier calorimetry was used to calculate the associated heat flux, which varied within the range 20–140 W m−2; total heat flow was in the range 20–100 MW. Seismicity data from the crater's rim show two distinct responses to large earthquakes at time scales from minutes to months. Chemistry of water and gas from fumaroles indicates a shallow magma heat source and seismicity data are consistent with this interpretation. Article in Journal/Newspaper glacier Alaska University of South Florida St. Petersburg: Digital USFSP Decade Glacier ENVELOPE(-69.826,-69.826,69.637,69.637) Annals of Glaciology 45 48 57 |
institution |
Open Polar |
collection |
University of South Florida St. Petersburg: Digital USFSP |
op_collection_id |
ftusouthflorida |
language |
unknown |
topic |
Earth Sciences |
spellingShingle |
Earth Sciences Benson, Carl Motyka, Roman McNutt, Stephen R. Lüthi, Martin Truffer, Martin Glacier-Volcano Interactions in the North Crater of Mt Wrangell, Alaska |
topic_facet |
Earth Sciences |
description |
Glaciological and related observations from 1961 to 2005 at the summit of Mt Wrangell (62.00° N, 144.02° W; 4317 m a.s.l.), a massive glacier-covered shield volcano in south-central Alaska, show marked changes that appear to have been initiated by the Great Alaska Earthquake (Mw = 9.2) of 27 March 1964. The 4 × 6 km diameter, ice-filled Summit Caldera with several post-caldera craters on its rim, comprises the summit region where annual snow accumulation is 1–2 m of water equivalent and the mean annual temperature, measured 10 m below the snow surface, is −20°C. Precision surveying, aerial photogrammetry and measurements of temperature and snow accumulation were used to measure the loss of glacier ice equivalent to about 0.03 km3 of water from the North Crater in a decade. Glacier calorimetry was used to calculate the associated heat flux, which varied within the range 20–140 W m−2; total heat flow was in the range 20–100 MW. Seismicity data from the crater's rim show two distinct responses to large earthquakes at time scales from minutes to months. Chemistry of water and gas from fumaroles indicates a shallow magma heat source and seismicity data are consistent with this interpretation. |
format |
Article in Journal/Newspaper |
author |
Benson, Carl Motyka, Roman McNutt, Stephen R. Lüthi, Martin Truffer, Martin |
author_facet |
Benson, Carl Motyka, Roman McNutt, Stephen R. Lüthi, Martin Truffer, Martin |
author_sort |
Benson, Carl |
title |
Glacier-Volcano Interactions in the North Crater of Mt Wrangell, Alaska |
title_short |
Glacier-Volcano Interactions in the North Crater of Mt Wrangell, Alaska |
title_full |
Glacier-Volcano Interactions in the North Crater of Mt Wrangell, Alaska |
title_fullStr |
Glacier-Volcano Interactions in the North Crater of Mt Wrangell, Alaska |
title_full_unstemmed |
Glacier-Volcano Interactions in the North Crater of Mt Wrangell, Alaska |
title_sort |
glacier-volcano interactions in the north crater of mt wrangell, alaska |
publisher |
Digital Commons @ University of South Florida |
publishDate |
2007 |
url |
https://digitalcommons.usf.edu/geo_facpub/317 https://doi.org/10.3189/172756407782282462 |
long_lat |
ENVELOPE(-69.826,-69.826,69.637,69.637) |
geographic |
Decade Glacier |
geographic_facet |
Decade Glacier |
genre |
glacier Alaska |
genre_facet |
glacier Alaska |
op_source |
School of Geosciences Faculty and Staff Publications |
op_relation |
https://digitalcommons.usf.edu/geo_facpub/317 doi:10.3189/172756407782282462 https://doi.org/10.3189/172756407782282462 |
op_doi |
https://doi.org/10.3189/172756407782282462 |
container_title |
Annals of Glaciology |
container_volume |
45 |
container_start_page |
48 |
op_container_end_page |
57 |
_version_ |
1772814621885857792 |