Construction of an Unattended Seismological Observatory (USO) in Permafrost
The construction of a large diameter cased borehole and surface instrument shelter for the installation of a high resolution, long term recording seismograph in marginal permafrost 15 miles west of Fairbanks, Alaska, is described. Permafrost extended to a depth of 123 ft and consisted of frozen silt...
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ftdtic:AD0760463 2023-05-15T16:37:00+02:00 Construction of an Unattended Seismological Observatory (USO) in Permafrost Lange, G R COLD REGIONS RESEARCH AND ENGINEERING LAB HANOVER NH 1973-02 text/html http://www.dtic.mil/docs/citations/AD0760463 http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=AD0760463 en eng http://www.dtic.mil/docs/citations/AD0760463 Approved for public release; distribution is unlimited. DTIC AND NTIS Seismology Snow Ice and Permafrost Construction Equipment Materials & Supplies *PERMAFROST *SEISMOLOGICAL STATIONS ALASKA COMPRESSED AIR CONSTRUCTION DRILLING DRILLS GRAVEL SAND SEISMOMETERS SILT THERMOCOUPLES boreholes cold weather construction *freezing *soils fairbanks(alaska) Text 1973 ftdtic 2016-02-24T11:07:06Z The construction of a large diameter cased borehole and surface instrument shelter for the installation of a high resolution, long term recording seismograph in marginal permafrost 15 miles west of Fairbanks, Alaska, is described. Permafrost extended to a depth of 123 ft and consisted of frozen silt, peat and sandy small gravel and was underlain by a thawed gravel aquifer. The first 48 ft of 16-in. hole was drilled with a truck-mounted auger. Forty thermocouples were installed in the fill placed over the casing and in the ground beneath to monitor thermal behavior. Data from these are discussed. Five thermistors attached to the borehole package yielded data on the ground temperature at the 80 to 85-ft depth interval. Using these data, the permafrost thickness obtained by exploratory drilling, and the mean annual air temperature, the ground temperature profile at depth is estimated. Text Ice permafrost Alaska Defense Technical Information Center: DTIC Technical Reports database Fairbanks |
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Open Polar |
collection |
Defense Technical Information Center: DTIC Technical Reports database |
op_collection_id |
ftdtic |
language |
English |
topic |
Seismology Snow Ice and Permafrost Construction Equipment Materials & Supplies *PERMAFROST *SEISMOLOGICAL STATIONS ALASKA COMPRESSED AIR CONSTRUCTION DRILLING DRILLS GRAVEL SAND SEISMOMETERS SILT THERMOCOUPLES boreholes cold weather construction *freezing *soils fairbanks(alaska) |
spellingShingle |
Seismology Snow Ice and Permafrost Construction Equipment Materials & Supplies *PERMAFROST *SEISMOLOGICAL STATIONS ALASKA COMPRESSED AIR CONSTRUCTION DRILLING DRILLS GRAVEL SAND SEISMOMETERS SILT THERMOCOUPLES boreholes cold weather construction *freezing *soils fairbanks(alaska) Lange, G R Construction of an Unattended Seismological Observatory (USO) in Permafrost |
topic_facet |
Seismology Snow Ice and Permafrost Construction Equipment Materials & Supplies *PERMAFROST *SEISMOLOGICAL STATIONS ALASKA COMPRESSED AIR CONSTRUCTION DRILLING DRILLS GRAVEL SAND SEISMOMETERS SILT THERMOCOUPLES boreholes cold weather construction *freezing *soils fairbanks(alaska) |
description |
The construction of a large diameter cased borehole and surface instrument shelter for the installation of a high resolution, long term recording seismograph in marginal permafrost 15 miles west of Fairbanks, Alaska, is described. Permafrost extended to a depth of 123 ft and consisted of frozen silt, peat and sandy small gravel and was underlain by a thawed gravel aquifer. The first 48 ft of 16-in. hole was drilled with a truck-mounted auger. Forty thermocouples were installed in the fill placed over the casing and in the ground beneath to monitor thermal behavior. Data from these are discussed. Five thermistors attached to the borehole package yielded data on the ground temperature at the 80 to 85-ft depth interval. Using these data, the permafrost thickness obtained by exploratory drilling, and the mean annual air temperature, the ground temperature profile at depth is estimated. |
author2 |
COLD REGIONS RESEARCH AND ENGINEERING LAB HANOVER NH |
format |
Text |
author |
Lange, G R |
author_facet |
Lange, G R |
author_sort |
Lange, G R |
title |
Construction of an Unattended Seismological Observatory (USO) in Permafrost |
title_short |
Construction of an Unattended Seismological Observatory (USO) in Permafrost |
title_full |
Construction of an Unattended Seismological Observatory (USO) in Permafrost |
title_fullStr |
Construction of an Unattended Seismological Observatory (USO) in Permafrost |
title_full_unstemmed |
Construction of an Unattended Seismological Observatory (USO) in Permafrost |
title_sort |
construction of an unattended seismological observatory (uso) in permafrost |
publishDate |
1973 |
url |
http://www.dtic.mil/docs/citations/AD0760463 http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=AD0760463 |
geographic |
Fairbanks |
geographic_facet |
Fairbanks |
genre |
Ice permafrost Alaska |
genre_facet |
Ice permafrost Alaska |
op_source |
DTIC AND NTIS |
op_relation |
http://www.dtic.mil/docs/citations/AD0760463 |
op_rights |
Approved for public release; distribution is unlimited. |
_version_ |
1766027310213890048 |