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...
Published in: | The Cryosphere |
---|---|
Main Authors: | , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Copernicus Publications
2012
|
Subjects: | |
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 |
id |
fttriple:oai:gotriple.eu:oai:doaj.org/article:bc225d952032469a89a238e7f7af3e4b |
---|---|
record_format |
openpolar |
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 |
op_rights |
undefined |
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 |
_version_ |
1766010114721972224 |