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...
Published in: | Annals of Geophysics |
---|---|
Main Authors: | , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Istituto Nazionale di Geofisica e Vulcanologia, INGV
1997
|
Subjects: | |
Online Access: | https://www.annalsofgeophysics.eu/index.php/annals/article/view/3914 https://doi.org/10.4401/ag-3914 |
id |
ftjaog:oai:ojs.annalsofgeophysics.eu:article/3914 |
---|---|
record_format |
openpolar |
spelling |
ftjaog:oai:ojs.annalsofgeophysics.eu:article/3914 2023-05-15T13:54:52+02:00 A search for the volcanomagnetic signal at Deception volcano (South Shetland I., Antarctica) Garcìa, A. Blanco, I. Torta, J. M. Astiz, M. M. Ibáñez, J. M. Ortiz, R. 1997-11-25 application/pdf https://www.annalsofgeophysics.eu/index.php/annals/article/view/3914 https://doi.org/10.4401/ag-3914 eng eng Istituto Nazionale di Geofisica e Vulcanologia, INGV https://www.annalsofgeophysics.eu/index.php/annals/article/view/3914/3979 https://www.annalsofgeophysics.eu/index.php/annals/article/view/3914 doi:10.4401/ag-3914 Annals of Geophysics; V. 40 N. 2 (1997) Annals of Geophysics; Vol. 40 No. 2 (1997) 2037-416X 1593-5213 Deception Island volcanomagnetic signal Antartica 04.02.04. Magnetic and electrical methods 04.08.06. Volcano monitoring info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion 1997 ftjaog https://doi.org/10.4401/ag-3914 2022-03-27T06:36:41Z 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 Annals of Geophysics (INGV, Istituto Nazionale di Geofisica e Vulcanologia) 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 |
Annals of Geophysics (INGV, Istituto Nazionale di Geofisica e Vulcanologia) |
op_collection_id |
ftjaog |
language |
English |
topic |
Deception Island volcanomagnetic signal Antartica 04.02.04. Magnetic and electrical methods 04.08.06. Volcano monitoring |
spellingShingle |
Deception Island volcanomagnetic signal Antartica 04.02.04. Magnetic and electrical methods 04.08.06. Volcano monitoring Garcìa, A. Blanco, I. Torta, J. M. Astiz, M. M. Ibáñez, J. M. Ortiz, R. A search for the volcanomagnetic signal at Deception volcano (South Shetland I., Antarctica) |
topic_facet |
Deception Island volcanomagnetic signal Antartica 04.02.04. Magnetic and electrical methods 04.08.06. Volcano monitoring |
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 |
Garcìa, A. Blanco, I. Torta, J. M. Astiz, M. M. Ibáñez, J. M. Ortiz, R. |
author_facet |
Garcìa, A. Blanco, I. Torta, J. M. Astiz, M. M. Ibáñez, J. M. Ortiz, R. |
author_sort |
Garcìa, A. |
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://www.annalsofgeophysics.eu/index.php/annals/article/view/3914 https://doi.org/10.4401/ag-3914 |
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; V. 40 N. 2 (1997) Annals of Geophysics; Vol. 40 No. 2 (1997) 2037-416X 1593-5213 |
op_relation |
https://www.annalsofgeophysics.eu/index.php/annals/article/view/3914/3979 https://www.annalsofgeophysics.eu/index.php/annals/article/view/3914 doi:10.4401/ag-3914 |
op_doi |
https://doi.org/10.4401/ag-3914 |
container_title |
Annals of Geophysics |
container_volume |
40 |
container_issue |
2 |
_version_ |
1766261011001638912 |