Case study of combined marine- and land-based passive seismic surveying in front of Nordenskiöldbreen outlet glacier, Adolfbukta, Svalbard
Glaciers generate seismic waves due to calving and fracturing, meaning that recording and following event classification can be used to monitor glacier dynamics. Our aim with this study is to analyse seismic data acquired at the seabed and on land in front of Nordenskiöldbreen on Svalbard during 8 d...
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Online Access: | https://hdl.handle.net/11250/3092711 https://doi.org/10.1002/nsg.12266 |
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ftunivbergen:oai:bora.uib.no:11250/3092711 2023-10-29T02:36:31+01:00 Case study of combined marine- and land-based passive seismic surveying in front of Nordenskiöldbreen outlet glacier, Adolfbukta, Svalbard Stemland, Helene Ruud, Bent Ole Johansen, Tor Arne 2023 application/pdf https://hdl.handle.net/11250/3092711 https://doi.org/10.1002/nsg.12266 eng eng Wiley urn:issn:1569-4445 https://hdl.handle.net/11250/3092711 https://doi.org/10.1002/nsg.12266 cristin:2177697 Near Surface Geophysics. 2023, 21 (5), 376-391. Navngivelse-Ikkekommersiell 4.0 Internasjonal http://creativecommons.org/licenses/by-nc/4.0/deed.no Copyright 2023 The Author(s) Near Surface Geophysics 376-391 21 5 Journal article Peer reviewed 2023 ftunivbergen https://doi.org/10.1002/nsg.12266 2023-10-04T23:08:15Z Glaciers generate seismic waves due to calving and fracturing, meaning that recording and following event classification can be used to monitor glacier dynamics. Our aim with this study is to analyse seismic data acquired at the seabed and on land in front of Nordenskiöldbreen on Svalbard during 8 days in October 2020. The survey included 27 ocean bottom nodes, each equipped with 3 geophones and a hydrophone, and 101 land-based geophones. The resulting data contain numerous seismic P-, S- and Scholte wave events throughout the study period, as well as non-seismic gravity waves. The recording quality strongly depends on receiver type and location, especially for the latter wave types. Our results demonstrate that hydrophones at the seabed are advantageous to record gravity waves, and that Scholte waves are only recorded close to the glacier. The Scholte waves are used to estimate the near-surface S-wave profile of the seabed sediments, and the gravity wave amplitudes are converted to wave heights at the surface. We further discuss possible source mechanisms for the recorded events and present evidence that waves from earthquakes, calving and brittle fracturing of the glacier and icebergs are all represented in the data. The interpretation is based on frequency content, duration, seismic velocities and onset (emergent/impulsive) and is supported by source localization, which we show is challenging for this dataset. In conclusion, our study demonstrates the potential of using seismic observations for detecting glacier-related events and provides valuable knowledge about the importance of survey geometry, particularly the advantages of including seabed receivers in the vicinity of the glacier. publishedVersion Article in Journal/Newspaper glacier Svalbard University of Bergen: Bergen Open Research Archive (BORA-UiB) Near Surface Geophysics 21 5 376 391 |
institution |
Open Polar |
collection |
University of Bergen: Bergen Open Research Archive (BORA-UiB) |
op_collection_id |
ftunivbergen |
language |
English |
description |
Glaciers generate seismic waves due to calving and fracturing, meaning that recording and following event classification can be used to monitor glacier dynamics. Our aim with this study is to analyse seismic data acquired at the seabed and on land in front of Nordenskiöldbreen on Svalbard during 8 days in October 2020. The survey included 27 ocean bottom nodes, each equipped with 3 geophones and a hydrophone, and 101 land-based geophones. The resulting data contain numerous seismic P-, S- and Scholte wave events throughout the study period, as well as non-seismic gravity waves. The recording quality strongly depends on receiver type and location, especially for the latter wave types. Our results demonstrate that hydrophones at the seabed are advantageous to record gravity waves, and that Scholte waves are only recorded close to the glacier. The Scholte waves are used to estimate the near-surface S-wave profile of the seabed sediments, and the gravity wave amplitudes are converted to wave heights at the surface. We further discuss possible source mechanisms for the recorded events and present evidence that waves from earthquakes, calving and brittle fracturing of the glacier and icebergs are all represented in the data. The interpretation is based on frequency content, duration, seismic velocities and onset (emergent/impulsive) and is supported by source localization, which we show is challenging for this dataset. In conclusion, our study demonstrates the potential of using seismic observations for detecting glacier-related events and provides valuable knowledge about the importance of survey geometry, particularly the advantages of including seabed receivers in the vicinity of the glacier. publishedVersion |
format |
Article in Journal/Newspaper |
author |
Stemland, Helene Ruud, Bent Ole Johansen, Tor Arne |
spellingShingle |
Stemland, Helene Ruud, Bent Ole Johansen, Tor Arne Case study of combined marine- and land-based passive seismic surveying in front of Nordenskiöldbreen outlet glacier, Adolfbukta, Svalbard |
author_facet |
Stemland, Helene Ruud, Bent Ole Johansen, Tor Arne |
author_sort |
Stemland, Helene |
title |
Case study of combined marine- and land-based passive seismic surveying in front of Nordenskiöldbreen outlet glacier, Adolfbukta, Svalbard |
title_short |
Case study of combined marine- and land-based passive seismic surveying in front of Nordenskiöldbreen outlet glacier, Adolfbukta, Svalbard |
title_full |
Case study of combined marine- and land-based passive seismic surveying in front of Nordenskiöldbreen outlet glacier, Adolfbukta, Svalbard |
title_fullStr |
Case study of combined marine- and land-based passive seismic surveying in front of Nordenskiöldbreen outlet glacier, Adolfbukta, Svalbard |
title_full_unstemmed |
Case study of combined marine- and land-based passive seismic surveying in front of Nordenskiöldbreen outlet glacier, Adolfbukta, Svalbard |
title_sort |
case study of combined marine- and land-based passive seismic surveying in front of nordenskiöldbreen outlet glacier, adolfbukta, svalbard |
publisher |
Wiley |
publishDate |
2023 |
url |
https://hdl.handle.net/11250/3092711 https://doi.org/10.1002/nsg.12266 |
genre |
glacier Svalbard |
genre_facet |
glacier Svalbard |
op_source |
Near Surface Geophysics 376-391 21 5 |
op_relation |
urn:issn:1569-4445 https://hdl.handle.net/11250/3092711 https://doi.org/10.1002/nsg.12266 cristin:2177697 Near Surface Geophysics. 2023, 21 (5), 376-391. |
op_rights |
Navngivelse-Ikkekommersiell 4.0 Internasjonal http://creativecommons.org/licenses/by-nc/4.0/deed.no Copyright 2023 The Author(s) |
op_doi |
https://doi.org/10.1002/nsg.12266 |
container_title |
Near Surface Geophysics |
container_volume |
21 |
container_issue |
5 |
container_start_page |
376 |
op_container_end_page |
391 |
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1781060494998634496 |