Geomagnetic observations on Tristan da Cunha, South Atlantic Ocean
Few geomagnetic ground observations exist of the Earth’s strongest core field anomaly, the South Atlantic Anomaly (SAA). The geomagnetic repeat station on the island Tristan da Cunha, located half-way between South Africa and South America at 37° 05’ S, 12° 18’ W, is therefore of crucial importance....
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Istituto Nazionale di Geofisica e Vulcanologia (INGV)
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ftdoajarticles:oai:doaj.org/article:d76c20c9e2084376851eb189a5e747d0 2023-05-15T18:21:05+02:00 Geomagnetic observations on Tristan da Cunha, South Atlantic Ocean Susan Macmillan Alan M. Berarducci Lars William Pedersen Cathrine Fox Maule Nils Olsen Jürgen Matzka 2009-06-01T00:00:00Z https://doi.org/10.4401/ag-4633 https://doaj.org/article/d76c20c9e2084376851eb189a5e747d0 EN eng Istituto Nazionale di Geofisica e Vulcanologia (INGV) http://www.annalsofgeophysics.eu/index.php/annals/article/view/4633 https://doaj.org/toc/1593-5213 https://doaj.org/toc/2037-416X doi:10.4401/ag-4633 1593-5213 2037-416X https://doaj.org/article/d76c20c9e2084376851eb189a5e747d0 Annals of Geophysics, Vol 52, Iss 1, Pp 97-105 (2009) South Atlantic Anomaly – geomagnetic observatory – geomagnetic repeat station – Tristan da Cunha Meteorology. Climatology QC851-999 Geophysics. Cosmic physics QC801-809 article 2009 ftdoajarticles https://doi.org/10.4401/ag-4633 2022-12-31T07:04:45Z Few geomagnetic ground observations exist of the Earth’s strongest core field anomaly, the South Atlantic Anomaly (SAA). The geomagnetic repeat station on the island Tristan da Cunha, located half-way between South Africa and South America at 37° 05’ S, 12° 18’ W, is therefore of crucial importance. We have conducted several sets of repeat station measurements during magnetically quiet conditions (Kp 2o or less) in 2004. The procedures are described and the results are compared to those from earlier campaigns and to the predictions of various global field models. Features of the local crustal bias field and the solar quiet daily variation are discussed. We also evaluate the benefit of continuous magnetic field recordings from Tristan da Cunha, and argue that such a data set is a very valuable addition to geomagnetic satellite data. Recently, funds were set up to establish and operate a magnetometer station on Tristan da Cunha during the Swarm magnetic satellite mission (2011-2014). Article in Journal/Newspaper South Atlantic Ocean Directory of Open Access Journals: DOAJ Articles Tristan ENVELOPE(140.900,140.900,-66.735,-66.735) Annals of Geophysics 52 1 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
South Atlantic Anomaly – geomagnetic observatory – geomagnetic repeat station – Tristan da Cunha Meteorology. Climatology QC851-999 Geophysics. Cosmic physics QC801-809 |
spellingShingle |
South Atlantic Anomaly – geomagnetic observatory – geomagnetic repeat station – Tristan da Cunha Meteorology. Climatology QC851-999 Geophysics. Cosmic physics QC801-809 Susan Macmillan Alan M. Berarducci Lars William Pedersen Cathrine Fox Maule Nils Olsen Jürgen Matzka Geomagnetic observations on Tristan da Cunha, South Atlantic Ocean |
topic_facet |
South Atlantic Anomaly – geomagnetic observatory – geomagnetic repeat station – Tristan da Cunha Meteorology. Climatology QC851-999 Geophysics. Cosmic physics QC801-809 |
description |
Few geomagnetic ground observations exist of the Earth’s strongest core field anomaly, the South Atlantic Anomaly (SAA). The geomagnetic repeat station on the island Tristan da Cunha, located half-way between South Africa and South America at 37° 05’ S, 12° 18’ W, is therefore of crucial importance. We have conducted several sets of repeat station measurements during magnetically quiet conditions (Kp 2o or less) in 2004. The procedures are described and the results are compared to those from earlier campaigns and to the predictions of various global field models. Features of the local crustal bias field and the solar quiet daily variation are discussed. We also evaluate the benefit of continuous magnetic field recordings from Tristan da Cunha, and argue that such a data set is a very valuable addition to geomagnetic satellite data. Recently, funds were set up to establish and operate a magnetometer station on Tristan da Cunha during the Swarm magnetic satellite mission (2011-2014). |
format |
Article in Journal/Newspaper |
author |
Susan Macmillan Alan M. Berarducci Lars William Pedersen Cathrine Fox Maule Nils Olsen Jürgen Matzka |
author_facet |
Susan Macmillan Alan M. Berarducci Lars William Pedersen Cathrine Fox Maule Nils Olsen Jürgen Matzka |
author_sort |
Susan Macmillan |
title |
Geomagnetic observations on Tristan da Cunha, South Atlantic Ocean |
title_short |
Geomagnetic observations on Tristan da Cunha, South Atlantic Ocean |
title_full |
Geomagnetic observations on Tristan da Cunha, South Atlantic Ocean |
title_fullStr |
Geomagnetic observations on Tristan da Cunha, South Atlantic Ocean |
title_full_unstemmed |
Geomagnetic observations on Tristan da Cunha, South Atlantic Ocean |
title_sort |
geomagnetic observations on tristan da cunha, south atlantic ocean |
publisher |
Istituto Nazionale di Geofisica e Vulcanologia (INGV) |
publishDate |
2009 |
url |
https://doi.org/10.4401/ag-4633 https://doaj.org/article/d76c20c9e2084376851eb189a5e747d0 |
long_lat |
ENVELOPE(140.900,140.900,-66.735,-66.735) |
geographic |
Tristan |
geographic_facet |
Tristan |
genre |
South Atlantic Ocean |
genre_facet |
South Atlantic Ocean |
op_source |
Annals of Geophysics, Vol 52, Iss 1, Pp 97-105 (2009) |
op_relation |
http://www.annalsofgeophysics.eu/index.php/annals/article/view/4633 https://doaj.org/toc/1593-5213 https://doaj.org/toc/2037-416X doi:10.4401/ag-4633 1593-5213 2037-416X https://doaj.org/article/d76c20c9e2084376851eb189a5e747d0 |
op_doi |
https://doi.org/10.4401/ag-4633 |
container_title |
Annals of Geophysics |
container_volume |
52 |
container_issue |
1 |
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1766200159540084736 |