Seismic amplitude ratio analysis of the 2014-2015 Bár∂arbunga-Holuhraun dike propagation and eruption
Magma is transported in brittle rock through dikes and sills. This movement may be accompanied by the release of seismic energy that can be tracked from the Earth's surface. Locating dikes and deciphering their dynamics is therefore of prime importance in understanding and potentially forecasti...
Published in: | Journal of Geophysical Research: Solid Earth |
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ftunivgent:oai:archive.ugent.be:8546993 2023-06-11T04:13:07+02:00 Seismic amplitude ratio analysis of the 2014-2015 Bár∂arbunga-Holuhraun dike propagation and eruption Caudron, Corentin White, Robert S Green, Robert G Woods, Jennifer Ágústsdóttir, Thorbjörg Donaldson, Clare Greenfield, Tim Rivalta, Eleonora Brandsdóttir, Bryndís 2018 application/pdf https://biblio.ugent.be/publication/8546993 http://hdl.handle.net/1854/LU-8546993 https://doi.org/10.1002/2017jb014660 https://biblio.ugent.be/publication/8546993/file/8607374 eng eng https://biblio.ugent.be/publication/8546993 http://hdl.handle.net/1854/LU-8546993 http://dx.doi.org/10.1002/2017jb014660 https://biblio.ugent.be/publication/8546993/file/8607374 No license (in copyright) info:eu-repo/semantics/restrictedAccess JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH ISSN: 2169-9313 Earth and Environmental Sciences volcanology seismology magma migration monitoring dike propagation Bardarbunga-Holuhraun LA-FOURNAISE VOLCANO TREMOR SOURCE AMPLITUDE ICELAND LOCATION JAPAN DYKE BARDARBUNGA EARTHQUAKE FREQUENCY MIGRATION journalArticle info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion 2018 ftunivgent https://doi.org/10.1002/2017jb014660 2023-05-10T22:27:17Z Magma is transported in brittle rock through dikes and sills. This movement may be accompanied by the release of seismic energy that can be tracked from the Earth's surface. Locating dikes and deciphering their dynamics is therefore of prime importance in understanding and potentially forecasting volcanic eruptions. The Seismic Amplitude Ratio Analysis (SARA) method aims to track melt propagation using the amplitudes recorded across a seismic network without picking the arrival times of individual earthquake phases. This study validates this methodology by comparing SARA locations (filtered between 2 and 16Hz) with the earthquake locations (same frequency band) recorded during the 2014-2015 Bar arbunga-Holuhraun dike intrusion and eruption in Iceland. Integrating both approaches also provides the opportunity to investigate the spatiotemporal characteristics of magma migration during the dike intrusion and ensuing eruption. During the intrusion SARA locations correspond remarkably well to the locations of earthquakes. Several exceptions are, however, observed. (1) A low-frequency signal was possibly associated with a subglacial eruption on 23 August. (2) A systematic retreat of the seismicity was also observed to the back of each active segment during stalled phases and was associated with a larger spatial extent of the seismic energy source. This behavior may be controlled by the dike's shape and/or by dike inflation. (3) During the eruption SARA locations consistently focused at the eruptive site. (4) Tremor-rich signal close to ice cauldrons occurred on 3 September. This study demonstrates the power of the SARA methodology, provided robust site amplification; Quality Factors and seismic velocities are available. Plain Language Summary Locating earthquakes usually implies picking phase arrivals (P and S waves). Another technique called Seismic Amplitude Ratio Analysis (SARA) was recently introduced to locate them only by using the amplitude recorded at different pairs of seismic stations. However, this ... Article in Journal/Newspaper Iceland Ghent University Academic Bibliography Holuhraun ENVELOPE(-16.831,-16.831,64.852,64.852) Bardarbunga ENVELOPE(-17.528,-17.528,64.635,64.635) Bár ENVELOPE(-20.913,-20.913,63.904,63.904) Journal of Geophysical Research: Solid Earth 123 1 264 276 |
institution |
Open Polar |
collection |
Ghent University Academic Bibliography |
op_collection_id |
ftunivgent |
language |
English |
topic |
Earth and Environmental Sciences volcanology seismology magma migration monitoring dike propagation Bardarbunga-Holuhraun LA-FOURNAISE VOLCANO TREMOR SOURCE AMPLITUDE ICELAND LOCATION JAPAN DYKE BARDARBUNGA EARTHQUAKE FREQUENCY MIGRATION |
spellingShingle |
Earth and Environmental Sciences volcanology seismology magma migration monitoring dike propagation Bardarbunga-Holuhraun LA-FOURNAISE VOLCANO TREMOR SOURCE AMPLITUDE ICELAND LOCATION JAPAN DYKE BARDARBUNGA EARTHQUAKE FREQUENCY MIGRATION Caudron, Corentin White, Robert S Green, Robert G Woods, Jennifer Ágústsdóttir, Thorbjörg Donaldson, Clare Greenfield, Tim Rivalta, Eleonora Brandsdóttir, Bryndís Seismic amplitude ratio analysis of the 2014-2015 Bár∂arbunga-Holuhraun dike propagation and eruption |
topic_facet |
Earth and Environmental Sciences volcanology seismology magma migration monitoring dike propagation Bardarbunga-Holuhraun LA-FOURNAISE VOLCANO TREMOR SOURCE AMPLITUDE ICELAND LOCATION JAPAN DYKE BARDARBUNGA EARTHQUAKE FREQUENCY MIGRATION |
description |
Magma is transported in brittle rock through dikes and sills. This movement may be accompanied by the release of seismic energy that can be tracked from the Earth's surface. Locating dikes and deciphering their dynamics is therefore of prime importance in understanding and potentially forecasting volcanic eruptions. The Seismic Amplitude Ratio Analysis (SARA) method aims to track melt propagation using the amplitudes recorded across a seismic network without picking the arrival times of individual earthquake phases. This study validates this methodology by comparing SARA locations (filtered between 2 and 16Hz) with the earthquake locations (same frequency band) recorded during the 2014-2015 Bar arbunga-Holuhraun dike intrusion and eruption in Iceland. Integrating both approaches also provides the opportunity to investigate the spatiotemporal characteristics of magma migration during the dike intrusion and ensuing eruption. During the intrusion SARA locations correspond remarkably well to the locations of earthquakes. Several exceptions are, however, observed. (1) A low-frequency signal was possibly associated with a subglacial eruption on 23 August. (2) A systematic retreat of the seismicity was also observed to the back of each active segment during stalled phases and was associated with a larger spatial extent of the seismic energy source. This behavior may be controlled by the dike's shape and/or by dike inflation. (3) During the eruption SARA locations consistently focused at the eruptive site. (4) Tremor-rich signal close to ice cauldrons occurred on 3 September. This study demonstrates the power of the SARA methodology, provided robust site amplification; Quality Factors and seismic velocities are available. Plain Language Summary Locating earthquakes usually implies picking phase arrivals (P and S waves). Another technique called Seismic Amplitude Ratio Analysis (SARA) was recently introduced to locate them only by using the amplitude recorded at different pairs of seismic stations. However, this ... |
format |
Article in Journal/Newspaper |
author |
Caudron, Corentin White, Robert S Green, Robert G Woods, Jennifer Ágústsdóttir, Thorbjörg Donaldson, Clare Greenfield, Tim Rivalta, Eleonora Brandsdóttir, Bryndís |
author_facet |
Caudron, Corentin White, Robert S Green, Robert G Woods, Jennifer Ágústsdóttir, Thorbjörg Donaldson, Clare Greenfield, Tim Rivalta, Eleonora Brandsdóttir, Bryndís |
author_sort |
Caudron, Corentin |
title |
Seismic amplitude ratio analysis of the 2014-2015 Bár∂arbunga-Holuhraun dike propagation and eruption |
title_short |
Seismic amplitude ratio analysis of the 2014-2015 Bár∂arbunga-Holuhraun dike propagation and eruption |
title_full |
Seismic amplitude ratio analysis of the 2014-2015 Bár∂arbunga-Holuhraun dike propagation and eruption |
title_fullStr |
Seismic amplitude ratio analysis of the 2014-2015 Bár∂arbunga-Holuhraun dike propagation and eruption |
title_full_unstemmed |
Seismic amplitude ratio analysis of the 2014-2015 Bár∂arbunga-Holuhraun dike propagation and eruption |
title_sort |
seismic amplitude ratio analysis of the 2014-2015 bár∂arbunga-holuhraun dike propagation and eruption |
publishDate |
2018 |
url |
https://biblio.ugent.be/publication/8546993 http://hdl.handle.net/1854/LU-8546993 https://doi.org/10.1002/2017jb014660 https://biblio.ugent.be/publication/8546993/file/8607374 |
long_lat |
ENVELOPE(-16.831,-16.831,64.852,64.852) ENVELOPE(-17.528,-17.528,64.635,64.635) ENVELOPE(-20.913,-20.913,63.904,63.904) |
geographic |
Holuhraun Bardarbunga Bár |
geographic_facet |
Holuhraun Bardarbunga Bár |
genre |
Iceland |
genre_facet |
Iceland |
op_source |
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH ISSN: 2169-9313 |
op_relation |
https://biblio.ugent.be/publication/8546993 http://hdl.handle.net/1854/LU-8546993 http://dx.doi.org/10.1002/2017jb014660 https://biblio.ugent.be/publication/8546993/file/8607374 |
op_rights |
No license (in copyright) info:eu-repo/semantics/restrictedAccess |
op_doi |
https://doi.org/10.1002/2017jb014660 |
container_title |
Journal of Geophysical Research: Solid Earth |
container_volume |
123 |
container_issue |
1 |
container_start_page |
264 |
op_container_end_page |
276 |
_version_ |
1768389773689356288 |