Ground tilt observations at Syowa Station, Antarctica. Part 1. Borehole tiltmeter
P(論文) The first continuous observations of ground tilt in Antarctica were carried out at Syowa Station with a biaxial bubble-type borehole tiltmeter and a set of water-tube tiltmeter. The former was installed in a waterproof, steel-cased hole 196cm deep and 144mm in diameter. The observations began...
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ftnipr:oai:nipr.repo.nii.ac.jp:00001458 2024-09-09T19:03:17+00:00 Ground tilt observations at Syowa Station, Antarctica. Part 1. Borehole tiltmeter Kaminuma, Katsutada Nagao, Toshiyasu Ito, Kiyoshi 1983-10 application/pdf https://nipr.repo.nii.ac.jp/record/1458/files/KJ00000012091.pdf eng eng Memoirs of National Institute of Polar Research. Special issue 28 27 32 AA00733561 https://nipr.repo.nii.ac.jp/record/1458/files/KJ00000012091.pdf 1983 ftnipr 2024-06-17T04:00:39Z P(論文) The first continuous observations of ground tilt in Antarctica were carried out at Syowa Station with a biaxial bubble-type borehole tiltmeter and a set of water-tube tiltmeter. The former was installed in a waterproof, steel-cased hole 196cm deep and 144mm in diameter. The observations began in April 1981. This paper discusses the borehole tiltmeter data from April to December. The signals were recorded on a 12-channel chart recorder in the data processing hut, 150m north from the observation hole. The maximum tilt fluctuation during nine months was 17μrad in the X-component (E-W) and 24μrad in the Y-component (N-S). As the data seem to be seriously affected by underground temperature variations, the observed data were corrected for temperature assuming a linear relation between the ground tilt and the underground temperature. The corrected records showed a trend of upward tilt on the west and north sides throughout the observation period. The cumulative change of ground tilt during nine months of observation was -1.5μrad in the X-component and 6μrad in the Y-component. These observations demonstrate that a true ground tilt can be detected by the borehole tiltmeter. departmental bulletin paper Other/Unknown Material Antarc* Antarctica Memoirs of National Institute of Polar Research Polar Research National Institute of Polar Research Repository, Japan Syowa Station The ''Y'' ENVELOPE(-112.453,-112.453,57.591,57.591) |
institution |
Open Polar |
collection |
National Institute of Polar Research Repository, Japan |
op_collection_id |
ftnipr |
language |
English |
description |
P(論文) The first continuous observations of ground tilt in Antarctica were carried out at Syowa Station with a biaxial bubble-type borehole tiltmeter and a set of water-tube tiltmeter. The former was installed in a waterproof, steel-cased hole 196cm deep and 144mm in diameter. The observations began in April 1981. This paper discusses the borehole tiltmeter data from April to December. The signals were recorded on a 12-channel chart recorder in the data processing hut, 150m north from the observation hole. The maximum tilt fluctuation during nine months was 17μrad in the X-component (E-W) and 24μrad in the Y-component (N-S). As the data seem to be seriously affected by underground temperature variations, the observed data were corrected for temperature assuming a linear relation between the ground tilt and the underground temperature. The corrected records showed a trend of upward tilt on the west and north sides throughout the observation period. The cumulative change of ground tilt during nine months of observation was -1.5μrad in the X-component and 6μrad in the Y-component. These observations demonstrate that a true ground tilt can be detected by the borehole tiltmeter. departmental bulletin paper |
author |
Kaminuma, Katsutada Nagao, Toshiyasu Ito, Kiyoshi |
spellingShingle |
Kaminuma, Katsutada Nagao, Toshiyasu Ito, Kiyoshi Ground tilt observations at Syowa Station, Antarctica. Part 1. Borehole tiltmeter |
author_facet |
Kaminuma, Katsutada Nagao, Toshiyasu Ito, Kiyoshi |
author_sort |
Kaminuma, Katsutada |
title |
Ground tilt observations at Syowa Station, Antarctica. Part 1. Borehole tiltmeter |
title_short |
Ground tilt observations at Syowa Station, Antarctica. Part 1. Borehole tiltmeter |
title_full |
Ground tilt observations at Syowa Station, Antarctica. Part 1. Borehole tiltmeter |
title_fullStr |
Ground tilt observations at Syowa Station, Antarctica. Part 1. Borehole tiltmeter |
title_full_unstemmed |
Ground tilt observations at Syowa Station, Antarctica. Part 1. Borehole tiltmeter |
title_sort |
ground tilt observations at syowa station, antarctica. part 1. borehole tiltmeter |
publishDate |
1983 |
url |
https://nipr.repo.nii.ac.jp/record/1458/files/KJ00000012091.pdf |
long_lat |
ENVELOPE(-112.453,-112.453,57.591,57.591) |
geographic |
Syowa Station The ''Y'' |
geographic_facet |
Syowa Station The ''Y'' |
genre |
Antarc* Antarctica Memoirs of National Institute of Polar Research Polar Research |
genre_facet |
Antarc* Antarctica Memoirs of National Institute of Polar Research Polar Research |
op_relation |
Memoirs of National Institute of Polar Research. Special issue 28 27 32 AA00733561 https://nipr.repo.nii.ac.jp/record/1458/files/KJ00000012091.pdf |
_version_ |
1809817282721873920 |