Closing crack earthquakes within the Krafla caldera, North Iceland ...

Moment tensor analysis with a Bayesian approach was used to analyse a non-double-couple (non-DC) earthquake ($M_w$ ~ 1) with a high isotropic (implosive) component within the Krafla caldera, Iceland. We deduce that the earthquake was generated by a closing crack at depth. The event is well located,...

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Bibliographic Details
Main Authors: Mildon, ZK, Pugh, DJ, Tarasewicz, J, White, RS, Brandsdóttir, B
Format: Article in Journal/Newspaper
Language:English
Published: Oxford University Press 2016
Subjects:
hydrothermal systems
earthquake source observations
volcano seismology
Krafla
Iceland
Online Access:https://dx.doi.org/10.17863/cam.6256
https://www.repository.cam.ac.uk/handle/1810/261078
id ftdatacite:10.17863/cam.6256
record_format openpolar
spelling ftdatacite:10.17863/cam.6256 2024-02-27T08:41:54+00:00 Closing crack earthquakes within the Krafla caldera, North Iceland ... Mildon, ZK Pugh, DJ Tarasewicz, J White, RS Brandsdóttir, B 2016 https://dx.doi.org/10.17863/cam.6256 https://www.repository.cam.ac.uk/handle/1810/261078 en eng Oxford University Press open.access Creative Commons Attribution 4.0 International Creative Commons Attribution 4.0 International Creative Commons Attribution 4.0 International Creative Commons Attribution 4.0 International Attribution 4.0 International Attribution 4.0 International Attribution 4.0 International Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/legalcode cc-by-4.0 https://creativecommons.org/licenses/by/4.0/legalcode cc-by-4.0 https://creativecommons.org/licenses/by/4.0/legalcode cc-by-4.0 https://creativecommons.org/licenses/by/4.0/legalcode cc-by-4.0 http://purl.org/coar/access_right/c_abf2 hydrothermal systems earthquake source observations volcano seismology article-journal ScholarlyArticle JournalArticle Article 2016 ftdatacite https://doi.org/10.17863/cam.6256 2024-02-01T14:54:53Z Moment tensor analysis with a Bayesian approach was used to analyse a non-double-couple (non-DC) earthquake ($M_w$ ~ 1) with a high isotropic (implosive) component within the Krafla caldera, Iceland. We deduce that the earthquake was generated by a closing crack at depth. The event is well located, with high signal-to-noise ratio and shows dilatational $P$-wave first arrivals at all stations where the first arrival can be picked with confidence. Coverage of the focal sphere is comprehensive and the source mechanism stable across the full range of uncertainties. The non-DC event lies within a cluster of microseismic activity including many DC events. Hence, we conclude that it is a true non-DC closing crack earthquake as a result of geothermal utilization and observed magma chamber deflation in the region at present. ... Article in Journal/Newspaper Iceland DataCite Metadata Store (German National Library of Science and Technology) Krafla ENVELOPE(-16.747,-16.747,65.713,65.713)
institution Open Polar
collection DataCite Metadata Store (German National Library of Science and Technology)
op_collection_id ftdatacite
language English
topic hydrothermal systems
earthquake source observations
volcano seismology
spellingShingle hydrothermal systems
earthquake source observations
volcano seismology
Mildon, ZK
Pugh, DJ
Tarasewicz, J
White, RS
Brandsdóttir, B
Closing crack earthquakes within the Krafla caldera, North Iceland ...
topic_facet hydrothermal systems
earthquake source observations
volcano seismology
description Moment tensor analysis with a Bayesian approach was used to analyse a non-double-couple (non-DC) earthquake ($M_w$ ~ 1) with a high isotropic (implosive) component within the Krafla caldera, Iceland. We deduce that the earthquake was generated by a closing crack at depth. The event is well located, with high signal-to-noise ratio and shows dilatational $P$-wave first arrivals at all stations where the first arrival can be picked with confidence. Coverage of the focal sphere is comprehensive and the source mechanism stable across the full range of uncertainties. The non-DC event lies within a cluster of microseismic activity including many DC events. Hence, we conclude that it is a true non-DC closing crack earthquake as a result of geothermal utilization and observed magma chamber deflation in the region at present. ...
format Article in Journal/Newspaper
author Mildon, ZK
Pugh, DJ
Tarasewicz, J
White, RS
Brandsdóttir, B
author_facet Mildon, ZK
Pugh, DJ
Tarasewicz, J
White, RS
Brandsdóttir, B
author_sort Mildon, ZK
title Closing crack earthquakes within the Krafla caldera, North Iceland ...
title_short Closing crack earthquakes within the Krafla caldera, North Iceland ...
title_full Closing crack earthquakes within the Krafla caldera, North Iceland ...
title_fullStr Closing crack earthquakes within the Krafla caldera, North Iceland ...
title_full_unstemmed Closing crack earthquakes within the Krafla caldera, North Iceland ...
title_sort closing crack earthquakes within the krafla caldera, north iceland ...
publisher Oxford University Press
publishDate 2016
url https://dx.doi.org/10.17863/cam.6256
https://www.repository.cam.ac.uk/handle/1810/261078
long_lat ENVELOPE(-16.747,-16.747,65.713,65.713)
geographic Krafla
geographic_facet Krafla
genre Iceland
genre_facet Iceland
op_rights open.access
Creative Commons Attribution 4.0 International
Creative Commons Attribution 4.0 International
Creative Commons Attribution 4.0 International
Creative Commons Attribution 4.0 International
Attribution 4.0 International
Attribution 4.0 International
Attribution 4.0 International
Attribution 4.0 International
https://creativecommons.org/licenses/by/4.0/legalcode
cc-by-4.0
https://creativecommons.org/licenses/by/4.0/legalcode
cc-by-4.0
https://creativecommons.org/licenses/by/4.0/legalcode
cc-by-4.0
https://creativecommons.org/licenses/by/4.0/legalcode
cc-by-4.0
http://purl.org/coar/access_right/c_abf2
op_doi https://doi.org/10.17863/cam.6256
_version_ 1792049251163832320

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