A search for the volcanomagnetic signal at Deception volcano (South Shetland I., Antarctica)
After the increase in seismic activity detected during the 1991-1992 summer survey at Deception Island, the continuous measurement of total magnetic intensity was included among the different techniques used to monitor this active volcano. The Polish geomagnetic observatory Arctowski, located on Kin...
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Istituto Nazionale di Geofisica e Vulcanologia (INGV)
1997
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Online Access: | https://doi.org/10.4401/ag-3914 https://doaj.org/article/bf0241d5a4094a94a5065a81806b4c56 |
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ftdoajarticles:oai:doaj.org/article:bf0241d5a4094a94a5065a81806b4c56 2023-05-15T13:35:09+02:00 A search for the volcanomagnetic signal at Deception volcano (South Shetland I., Antarctica) J. M. Ibáñez M. M. Astiz J. M. Torta I. Blanco A. Garcìa R. Ortiz 1997-06-01T00:00:00Z https://doi.org/10.4401/ag-3914 https://doaj.org/article/bf0241d5a4094a94a5065a81806b4c56 EN eng Istituto Nazionale di Geofisica e Vulcanologia (INGV) http://www.annalsofgeophysics.eu/index.php/annals/article/view/3914 https://doaj.org/toc/1593-5213 https://doaj.org/toc/2037-416X doi:10.4401/ag-3914 1593-5213 2037-416X https://doaj.org/article/bf0241d5a4094a94a5065a81806b4c56 Annals of Geophysics, Vol 40, Iss 2 (1997) Deception Island volcanomagnetic signal Antartica Meteorology. Climatology QC851-999 Geophysics. Cosmic physics QC801-809 article 1997 ftdoajarticles https://doi.org/10.4401/ag-3914 2022-12-31T01:33:28Z After the increase in seismic activity detected during the 1991-1992 summer survey at Deception Island, the continuous measurement of total magnetic intensity was included among the different techniques used to monitor this active volcano. The Polish geomagnetic observatory Arctowski, located on King George Island, served as a reference station, and changes in the differences between the daily mean values at both stations were interpreted as indicators of volcanomagnetic effects at Deception. A magnetic station in continuous recording mode was also installed during the 1993-1994 and 1994-1995 surveys. During the latter, a second magnetometer was deployed on Deception Island, and a third one in the vicinity of the Spanish Antarctic Station on Livingston Island (at a distance of 35 km) and was used as a reference station. The results from the first survey suggest that a small magma injection, responsible for the seismic re-activation, could produce a volcanomagnetic effect, detected as a slight change in the difference between Deception and Arctowski. On the other hand, a long term variation starting at that moment seems to indicate a thermomagnetic effect. However the short register period of only two stations do not allow the sources to be modelled. The future deployment of a magnetic array during the austral summer surveys, throughout the volcano, and of a permanent geomagnetic observatory at Livingston I. is aimed at further observations of magnetic transients of volcanic origin at Deception Island. Article in Journal/Newspaper Antarc* Antarctic Antarctica antartic* Deception Island King George Island Livingston Island Directory of Open Access Journals: DOAJ Articles Antarctic Austral King George Island Deception Island ENVELOPE(-60.633,-60.633,-62.950,-62.950) Livingston Island ENVELOPE(-60.500,-60.500,-62.600,-62.600) Arctowski ENVELOPE(-58.467,-58.467,-62.167,-62.167) Annals of Geophysics 40 2 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Deception Island volcanomagnetic signal Antartica Meteorology. Climatology QC851-999 Geophysics. Cosmic physics QC801-809 |
spellingShingle |
Deception Island volcanomagnetic signal Antartica Meteorology. Climatology QC851-999 Geophysics. Cosmic physics QC801-809 J. M. Ibáñez M. M. Astiz J. M. Torta I. Blanco A. Garcìa R. Ortiz A search for the volcanomagnetic signal at Deception volcano (South Shetland I., Antarctica) |
topic_facet |
Deception Island volcanomagnetic signal Antartica Meteorology. Climatology QC851-999 Geophysics. Cosmic physics QC801-809 |
description |
After the increase in seismic activity detected during the 1991-1992 summer survey at Deception Island, the continuous measurement of total magnetic intensity was included among the different techniques used to monitor this active volcano. The Polish geomagnetic observatory Arctowski, located on King George Island, served as a reference station, and changes in the differences between the daily mean values at both stations were interpreted as indicators of volcanomagnetic effects at Deception. A magnetic station in continuous recording mode was also installed during the 1993-1994 and 1994-1995 surveys. During the latter, a second magnetometer was deployed on Deception Island, and a third one in the vicinity of the Spanish Antarctic Station on Livingston Island (at a distance of 35 km) and was used as a reference station. The results from the first survey suggest that a small magma injection, responsible for the seismic re-activation, could produce a volcanomagnetic effect, detected as a slight change in the difference between Deception and Arctowski. On the other hand, a long term variation starting at that moment seems to indicate a thermomagnetic effect. However the short register period of only two stations do not allow the sources to be modelled. The future deployment of a magnetic array during the austral summer surveys, throughout the volcano, and of a permanent geomagnetic observatory at Livingston I. is aimed at further observations of magnetic transients of volcanic origin at Deception Island. |
format |
Article in Journal/Newspaper |
author |
J. M. Ibáñez M. M. Astiz J. M. Torta I. Blanco A. Garcìa R. Ortiz |
author_facet |
J. M. Ibáñez M. M. Astiz J. M. Torta I. Blanco A. Garcìa R. Ortiz |
author_sort |
J. M. Ibáñez |
title |
A search for the volcanomagnetic signal at Deception volcano (South Shetland I., Antarctica) |
title_short |
A search for the volcanomagnetic signal at Deception volcano (South Shetland I., Antarctica) |
title_full |
A search for the volcanomagnetic signal at Deception volcano (South Shetland I., Antarctica) |
title_fullStr |
A search for the volcanomagnetic signal at Deception volcano (South Shetland I., Antarctica) |
title_full_unstemmed |
A search for the volcanomagnetic signal at Deception volcano (South Shetland I., Antarctica) |
title_sort |
search for the volcanomagnetic signal at deception volcano (south shetland i., antarctica) |
publisher |
Istituto Nazionale di Geofisica e Vulcanologia (INGV) |
publishDate |
1997 |
url |
https://doi.org/10.4401/ag-3914 https://doaj.org/article/bf0241d5a4094a94a5065a81806b4c56 |
long_lat |
ENVELOPE(-60.633,-60.633,-62.950,-62.950) ENVELOPE(-60.500,-60.500,-62.600,-62.600) ENVELOPE(-58.467,-58.467,-62.167,-62.167) |
geographic |
Antarctic Austral King George Island Deception Island Livingston Island Arctowski |
geographic_facet |
Antarctic Austral King George Island Deception Island Livingston Island Arctowski |
genre |
Antarc* Antarctic Antarctica antartic* Deception Island King George Island Livingston Island |
genre_facet |
Antarc* Antarctic Antarctica antartic* Deception Island King George Island Livingston Island |
op_source |
Annals of Geophysics, Vol 40, Iss 2 (1997) |
op_relation |
http://www.annalsofgeophysics.eu/index.php/annals/article/view/3914 https://doaj.org/toc/1593-5213 https://doaj.org/toc/2037-416X doi:10.4401/ag-3914 1593-5213 2037-416X https://doaj.org/article/bf0241d5a4094a94a5065a81806b4c56 |
op_doi |
https://doi.org/10.4401/ag-3914 |
container_title |
Annals of Geophysics |
container_volume |
40 |
container_issue |
2 |
_version_ |
1766061676815187968 |