Unusual signals recorded by ocean bottom seismometers in the flooded caldera of Deception Island volcano: volcanic gases or biological activity?
Abstract An ocean bottom seismometer (OBS) network was deployed for 1 month at Deception Island volcano, Antarctica, in early 2005. Although only two volcano-tectonic and three long-period events were observed, the three OBSs located > 2 km apart inside the caldera detected over 3900 events that...
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Online Access: | http://dx.doi.org/10.1017/s0954102013000758 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0954102013000758 |
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crcambridgeupr:10.1017/s0954102013000758 2024-03-03T08:39:18+00:00 Unusual signals recorded by ocean bottom seismometers in the flooded caldera of Deception Island volcano: volcanic gases or biological activity? Bowman, Daniel C. Wilcock, William S.D. 2013 http://dx.doi.org/10.1017/s0954102013000758 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0954102013000758 en eng Cambridge University Press (CUP) https://www.cambridge.org/core/terms Antarctic Science volume 26, issue 3, page 267-275 ISSN 0954-1020 1365-2079 Geology Ecology, Evolution, Behavior and Systematics Oceanography journal-article 2013 crcambridgeupr https://doi.org/10.1017/s0954102013000758 2024-02-08T08:44:16Z Abstract An ocean bottom seismometer (OBS) network was deployed for 1 month at Deception Island volcano, Antarctica, in early 2005. Although only two volcano-tectonic and three long-period events were observed, the three OBSs located > 2 km apart inside the caldera detected over 3900 events that could not be attributed to known volcanic or hydrothermal sources. These events are found on one instrument at a time and occur in three types. Type 1 events resemble impulsive signals from biological organisms while type 2 and type 3 events resemble long-period seismicity. The largest number of events was observed in a region of volcanic resurgence and hydrothermal venting. All three types occur together suggesting a common cause and they show evidence for a diurnal distribution. The events are most likely to be due to aquatic animals striking the sensors, but a geological source is also possible. In the first case, these signals indicate the presence of a biological community confined to the caldera. In the second case, they imply widespread hydrothermal activity in Port Foster. Future OBS experiments should bury the seismometers, include a hydrophone, deploy instruments side-by-side, or include a video camera to distinguish between biological and geological events. Article in Journal/Newspaper Antarc* Antarctic Science Antarctica Deception Island Cambridge University Press Deception Island ENVELOPE(-60.633,-60.633,-62.950,-62.950) Port Foster ENVELOPE(162.967,162.967,-78.400,-78.400) Antarctic Science 26 3 267 275 |
institution |
Open Polar |
collection |
Cambridge University Press |
op_collection_id |
crcambridgeupr |
language |
English |
topic |
Geology Ecology, Evolution, Behavior and Systematics Oceanography |
spellingShingle |
Geology Ecology, Evolution, Behavior and Systematics Oceanography Bowman, Daniel C. Wilcock, William S.D. Unusual signals recorded by ocean bottom seismometers in the flooded caldera of Deception Island volcano: volcanic gases or biological activity? |
topic_facet |
Geology Ecology, Evolution, Behavior and Systematics Oceanography |
description |
Abstract An ocean bottom seismometer (OBS) network was deployed for 1 month at Deception Island volcano, Antarctica, in early 2005. Although only two volcano-tectonic and three long-period events were observed, the three OBSs located > 2 km apart inside the caldera detected over 3900 events that could not be attributed to known volcanic or hydrothermal sources. These events are found on one instrument at a time and occur in three types. Type 1 events resemble impulsive signals from biological organisms while type 2 and type 3 events resemble long-period seismicity. The largest number of events was observed in a region of volcanic resurgence and hydrothermal venting. All three types occur together suggesting a common cause and they show evidence for a diurnal distribution. The events are most likely to be due to aquatic animals striking the sensors, but a geological source is also possible. In the first case, these signals indicate the presence of a biological community confined to the caldera. In the second case, they imply widespread hydrothermal activity in Port Foster. Future OBS experiments should bury the seismometers, include a hydrophone, deploy instruments side-by-side, or include a video camera to distinguish between biological and geological events. |
format |
Article in Journal/Newspaper |
author |
Bowman, Daniel C. Wilcock, William S.D. |
author_facet |
Bowman, Daniel C. Wilcock, William S.D. |
author_sort |
Bowman, Daniel C. |
title |
Unusual signals recorded by ocean bottom seismometers in the flooded caldera of Deception Island volcano: volcanic gases or biological activity? |
title_short |
Unusual signals recorded by ocean bottom seismometers in the flooded caldera of Deception Island volcano: volcanic gases or biological activity? |
title_full |
Unusual signals recorded by ocean bottom seismometers in the flooded caldera of Deception Island volcano: volcanic gases or biological activity? |
title_fullStr |
Unusual signals recorded by ocean bottom seismometers in the flooded caldera of Deception Island volcano: volcanic gases or biological activity? |
title_full_unstemmed |
Unusual signals recorded by ocean bottom seismometers in the flooded caldera of Deception Island volcano: volcanic gases or biological activity? |
title_sort |
unusual signals recorded by ocean bottom seismometers in the flooded caldera of deception island volcano: volcanic gases or biological activity? |
publisher |
Cambridge University Press (CUP) |
publishDate |
2013 |
url |
http://dx.doi.org/10.1017/s0954102013000758 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0954102013000758 |
long_lat |
ENVELOPE(-60.633,-60.633,-62.950,-62.950) ENVELOPE(162.967,162.967,-78.400,-78.400) |
geographic |
Deception Island Port Foster |
geographic_facet |
Deception Island Port Foster |
genre |
Antarc* Antarctic Science Antarctica Deception Island |
genre_facet |
Antarc* Antarctic Science Antarctica Deception Island |
op_source |
Antarctic Science volume 26, issue 3, page 267-275 ISSN 0954-1020 1365-2079 |
op_rights |
https://www.cambridge.org/core/terms |
op_doi |
https://doi.org/10.1017/s0954102013000758 |
container_title |
Antarctic Science |
container_volume |
26 |
container_issue |
3 |
container_start_page |
267 |
op_container_end_page |
275 |
_version_ |
1792494765966622720 |