Autonomous detection of calving-related seismicity at Kronebreen, Svalbard

We detect and cluster waveforms of seismic signals recorded close to the calving front of Kronebreen, Svalbard, to identify glacier-related seismic events and to investigate their relation to calving processes. Single-channel geophone data recorded over several months in 2009 and 2010 are combined w...

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Bibliographic Details
Published in:The Cryosphere
Main Authors: A. Köhler, A. Chapuis, C. Nuth, J. Kohler, C. Weidle
Format: Article in Journal/Newspaper
Language:English
Published: Copernicus Publications 2012
Subjects:
geo
Online Access:https://doi.org/10.5194/tc-6-393-2012
http://www.the-cryosphere.net/6/393/2012/tc-6-393-2012.pdf
https://doaj.org/article/bc225d952032469a89a238e7f7af3e4b
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spelling fttriple:oai:gotriple.eu:oai:doaj.org/article:bc225d952032469a89a238e7f7af3e4b 2023-05-15T16:22:08+02:00 Autonomous detection of calving-related seismicity at Kronebreen, Svalbard A. Köhler A. Chapuis C. Nuth J. Kohler C. Weidle 2012-03-01 https://doi.org/10.5194/tc-6-393-2012 http://www.the-cryosphere.net/6/393/2012/tc-6-393-2012.pdf https://doaj.org/article/bc225d952032469a89a238e7f7af3e4b en eng Copernicus Publications doi:10.5194/tc-6-393-2012 1994-0416 1994-0424 http://www.the-cryosphere.net/6/393/2012/tc-6-393-2012.pdf https://doaj.org/article/bc225d952032469a89a238e7f7af3e4b undefined The Cryosphere, Vol 6, Iss 2, Pp 393-406 (2012) geo envir Journal Article https://vocabularies.coar-repositories.org/resource_types/c_6501/ 2012 fttriple https://doi.org/10.5194/tc-6-393-2012 2023-01-22T17:50:35Z We detect and cluster waveforms of seismic signals recorded close to the calving front of Kronebreen, Svalbard, to identify glacier-related seismic events and to investigate their relation to calving processes. Single-channel geophone data recorded over several months in 2009 and 2010 are combined with eleven days of direct visual observations of the glacier front. We apply a processing scheme which combines conventional seismic event detection using a sensitive trigger algorithm and unsupervised clustering of all detected signals based on their waveform characteristics by means of Self-Organizing Maps (SOMs). About 10% of the directly observed calving events close to the geophone (<1 km) can be correlated with seismic detections. We are able to distinguish between false detections, instrumental artifacts, and three classes of signals which are, with different degrees of uncertainty, emitted by calving or glacier activity in general. By extrapolating the interpretation of seismic event classes beyond the time period of visual observations, the temporal distribution of glacier-related events shows an increase in event rate in autumn, particularly for the class which is related to iceberg calving. Using the seismic event distribution in this class as a proxy for the calving rate and measurements of glacier velocity and glacier front position, we discuss the possible relationship between glacier dynamics and calving processes at Kronebreen. Article in Journal/Newspaper glacier Svalbard The Cryosphere Unknown Kronebreen ENVELOPE(13.333,13.333,78.833,78.833) Svalbard The Cryosphere 6 2 393 406
institution Open Polar
collection Unknown
op_collection_id fttriple
language English
topic geo
envir
spellingShingle geo
envir
A. Köhler
A. Chapuis
C. Nuth
J. Kohler
C. Weidle
Autonomous detection of calving-related seismicity at Kronebreen, Svalbard
topic_facet geo
envir
description We detect and cluster waveforms of seismic signals recorded close to the calving front of Kronebreen, Svalbard, to identify glacier-related seismic events and to investigate their relation to calving processes. Single-channel geophone data recorded over several months in 2009 and 2010 are combined with eleven days of direct visual observations of the glacier front. We apply a processing scheme which combines conventional seismic event detection using a sensitive trigger algorithm and unsupervised clustering of all detected signals based on their waveform characteristics by means of Self-Organizing Maps (SOMs). About 10% of the directly observed calving events close to the geophone (<1 km) can be correlated with seismic detections. We are able to distinguish between false detections, instrumental artifacts, and three classes of signals which are, with different degrees of uncertainty, emitted by calving or glacier activity in general. By extrapolating the interpretation of seismic event classes beyond the time period of visual observations, the temporal distribution of glacier-related events shows an increase in event rate in autumn, particularly for the class which is related to iceberg calving. Using the seismic event distribution in this class as a proxy for the calving rate and measurements of glacier velocity and glacier front position, we discuss the possible relationship between glacier dynamics and calving processes at Kronebreen.
format Article in Journal/Newspaper
author A. Köhler
A. Chapuis
C. Nuth
J. Kohler
C. Weidle
author_facet A. Köhler
A. Chapuis
C. Nuth
J. Kohler
C. Weidle
author_sort A. Köhler
title Autonomous detection of calving-related seismicity at Kronebreen, Svalbard
title_short Autonomous detection of calving-related seismicity at Kronebreen, Svalbard
title_full Autonomous detection of calving-related seismicity at Kronebreen, Svalbard
title_fullStr Autonomous detection of calving-related seismicity at Kronebreen, Svalbard
title_full_unstemmed Autonomous detection of calving-related seismicity at Kronebreen, Svalbard
title_sort autonomous detection of calving-related seismicity at kronebreen, svalbard
publisher Copernicus Publications
publishDate 2012
url https://doi.org/10.5194/tc-6-393-2012
http://www.the-cryosphere.net/6/393/2012/tc-6-393-2012.pdf
https://doaj.org/article/bc225d952032469a89a238e7f7af3e4b
long_lat ENVELOPE(13.333,13.333,78.833,78.833)
geographic Kronebreen
Svalbard
geographic_facet Kronebreen
Svalbard
genre glacier
Svalbard
The Cryosphere
genre_facet glacier
Svalbard
The Cryosphere
op_source The Cryosphere, Vol 6, Iss 2, Pp 393-406 (2012)
op_relation doi:10.5194/tc-6-393-2012
1994-0416
1994-0424
http://www.the-cryosphere.net/6/393/2012/tc-6-393-2012.pdf
https://doaj.org/article/bc225d952032469a89a238e7f7af3e4b
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op_doi https://doi.org/10.5194/tc-6-393-2012
container_title The Cryosphere
container_volume 6
container_issue 2
container_start_page 393
op_container_end_page 406
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