Passive seismic recording of cryoseisms in Adventdalen, Svalbard
A series of transient seismic events were discovered in passive seismic recordings from 2-D geophone arrays deployed at a frost polygon site in Adventdalen, Svalbard. These events contain a high proportion of surface wave energy and produce high-quality dispersion images using an apparent offset re-...
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Copernicus Publications
2021
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fttriple:oai:gotriple.eu:oai:doaj.org/article:9debe6f372c049e49d84ad7dfa313dbe 2023-05-15T13:05:36+02:00 Passive seismic recording of cryoseisms in Adventdalen, Svalbard R. Romeyn A. Hanssen B. O. Ruud H. M. Stemland T. A. Johansen 2021-01-01 https://doi.org/10.5194/tc-15-283-2021 https://tc.copernicus.org/articles/15/283/2021/tc-15-283-2021.pdf https://doaj.org/article/9debe6f372c049e49d84ad7dfa313dbe en eng Copernicus Publications doi:10.5194/tc-15-283-2021 1994-0416 1994-0424 https://tc.copernicus.org/articles/15/283/2021/tc-15-283-2021.pdf https://doaj.org/article/9debe6f372c049e49d84ad7dfa313dbe undefined The Cryosphere, Vol 15, Pp 283-302 (2021) geo Journal Article https://vocabularies.coar-repositories.org/resource_types/c_6501/ 2021 fttriple https://doi.org/10.5194/tc-15-283-2021 2023-01-22T19:12:25Z A series of transient seismic events were discovered in passive seismic recordings from 2-D geophone arrays deployed at a frost polygon site in Adventdalen, Svalbard. These events contain a high proportion of surface wave energy and produce high-quality dispersion images using an apparent offset re-sorting and inter-trace delay minimisation technique to locate the seismic source, followed by cross-correlation beamforming dispersion imaging. The dispersion images are highly analogous to surface wave studies of pavements and display a complex multimodal dispersion pattern. Supported by theoretical modelling based on a highly simplified arrangement of horizontal layers, we infer that a ∼3.5–4.5 m thick, stiff, high-velocity layer overlies a ∼30 m thick layer that is significantly softer and slower at our study site. Based on previous studies we link the upper layer with syngenetic ground ice formed in aeolian sediments, while the underlying layer is linked to epigenetic permafrost in marine-deltaic sediments containing unfrozen saline pore water. Comparing events from spring and autumn indicates that temporal variation can be resolved via passive seismic monitoring. The transient seismic events that we record occur during periods of rapidly changing air temperature. This correlation, along with the spatial clustering along the elevated river terrace in a known frost polygon, ice-wedge area and the high proportion of surface wave energy, constitutes the primary evidence for us to interpret these events as frost quakes, a class of cryoseism. In this study we have proved the concept of passive seismic monitoring of permafrost in Adventdalen, Svalbard. Article in Journal/Newspaper Adventdalen Ice permafrost Svalbard The Cryosphere wedge* Unknown Adventdalen ENVELOPE(16.264,16.264,78.181,78.181) Svalbard The Cryosphere 15 1 283 302 |
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geo R. Romeyn A. Hanssen B. O. Ruud H. M. Stemland T. A. Johansen Passive seismic recording of cryoseisms in Adventdalen, Svalbard |
topic_facet |
geo |
description |
A series of transient seismic events were discovered in passive seismic recordings from 2-D geophone arrays deployed at a frost polygon site in Adventdalen, Svalbard. These events contain a high proportion of surface wave energy and produce high-quality dispersion images using an apparent offset re-sorting and inter-trace delay minimisation technique to locate the seismic source, followed by cross-correlation beamforming dispersion imaging. The dispersion images are highly analogous to surface wave studies of pavements and display a complex multimodal dispersion pattern. Supported by theoretical modelling based on a highly simplified arrangement of horizontal layers, we infer that a ∼3.5–4.5 m thick, stiff, high-velocity layer overlies a ∼30 m thick layer that is significantly softer and slower at our study site. Based on previous studies we link the upper layer with syngenetic ground ice formed in aeolian sediments, while the underlying layer is linked to epigenetic permafrost in marine-deltaic sediments containing unfrozen saline pore water. Comparing events from spring and autumn indicates that temporal variation can be resolved via passive seismic monitoring. The transient seismic events that we record occur during periods of rapidly changing air temperature. This correlation, along with the spatial clustering along the elevated river terrace in a known frost polygon, ice-wedge area and the high proportion of surface wave energy, constitutes the primary evidence for us to interpret these events as frost quakes, a class of cryoseism. In this study we have proved the concept of passive seismic monitoring of permafrost in Adventdalen, Svalbard. |
format |
Article in Journal/Newspaper |
author |
R. Romeyn A. Hanssen B. O. Ruud H. M. Stemland T. A. Johansen |
author_facet |
R. Romeyn A. Hanssen B. O. Ruud H. M. Stemland T. A. Johansen |
author_sort |
R. Romeyn |
title |
Passive seismic recording of cryoseisms in Adventdalen, Svalbard |
title_short |
Passive seismic recording of cryoseisms in Adventdalen, Svalbard |
title_full |
Passive seismic recording of cryoseisms in Adventdalen, Svalbard |
title_fullStr |
Passive seismic recording of cryoseisms in Adventdalen, Svalbard |
title_full_unstemmed |
Passive seismic recording of cryoseisms in Adventdalen, Svalbard |
title_sort |
passive seismic recording of cryoseisms in adventdalen, svalbard |
publisher |
Copernicus Publications |
publishDate |
2021 |
url |
https://doi.org/10.5194/tc-15-283-2021 https://tc.copernicus.org/articles/15/283/2021/tc-15-283-2021.pdf https://doaj.org/article/9debe6f372c049e49d84ad7dfa313dbe |
long_lat |
ENVELOPE(16.264,16.264,78.181,78.181) |
geographic |
Adventdalen Svalbard |
geographic_facet |
Adventdalen Svalbard |
genre |
Adventdalen Ice permafrost Svalbard The Cryosphere wedge* |
genre_facet |
Adventdalen Ice permafrost Svalbard The Cryosphere wedge* |
op_source |
The Cryosphere, Vol 15, Pp 283-302 (2021) |
op_relation |
doi:10.5194/tc-15-283-2021 1994-0416 1994-0424 https://tc.copernicus.org/articles/15/283/2021/tc-15-283-2021.pdf https://doaj.org/article/9debe6f372c049e49d84ad7dfa313dbe |
op_rights |
undefined |
op_doi |
https://doi.org/10.5194/tc-15-283-2021 |
container_title |
The Cryosphere |
container_volume |
15 |
container_issue |
1 |
container_start_page |
283 |
op_container_end_page |
302 |
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1766388749723238400 |