Changes in shear wave splitting before the 2010 Eyjafjallajokull eruption in Iceland
We use shear wave splitting (SWS) above microearthquakes to monitor stress variations before the 2010 March and April flank and summit eruptions of Eyjafjallajökull volcano in Iceland. SWS time delays before Eyjafjallajökull show characteristic variations similar to those seen before earthquakes. Th...
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Oxford University Press
2014
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Online Access: | http://nora.nerc.ac.uk/id/eprint/511803/ https://doi.org/10.1093/gji/ggu202 |
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ftnerc:oai:nora.nerc.ac.uk:511803 2023-05-15T16:09:23+02:00 Changes in shear wave splitting before the 2010 Eyjafjallajokull eruption in Iceland Liu, S. Crampin, S. Luckett, R. Yang, J. 2014 http://nora.nerc.ac.uk/id/eprint/511803/ https://doi.org/10.1093/gji/ggu202 unknown Oxford University Press Liu, S.; Crampin, S.; Luckett, R.; Yang, J. 2014 Changes in shear wave splitting before the 2010 Eyjafjallajokull eruption in Iceland. Geophysical Journal International, 199 (1). 102-112. https://doi.org/10.1093/gji/ggu202 <https://doi.org/10.1093/gji/ggu202> Publication - Article PeerReviewed 2014 ftnerc https://doi.org/10.1093/gji/ggu202 2023-02-04T19:42:08Z We use shear wave splitting (SWS) above microearthquakes to monitor stress variations before the 2010 March and April flank and summit eruptions of Eyjafjallajökull volcano in Iceland. SWS time delays before Eyjafjallajökull show characteristic variations similar to those seen before earthquakes. The time delays display a nearly linear increase before the eruption, an abrupt change of slope and a rapid nearly linear decrease until the flank eruption begins. Similar variations before earthquakes are interpreted as stress-accumulation increases, and stress-relaxation decreases as microcracks coalesce onto the eventual fault plane. The changes in SWS before Eyjafjallajökull are interpreted as a similar stress-accumulation increase, as magma penetrates the crust, and stress-relaxation decrease as microcracks coalesce onto the magma conduit prior to magma release. We suggest that the remarkable similarity between stress changes before eruption and earthquake is strong evidence for the New Geophysics of a critically microcracked crust. Article in Journal/Newspaper Eyjafjallajökull Iceland Natural Environment Research Council: NERC Open Research Archive Eyjafjallajokull ENVELOPE(-19.633,-19.633,63.631,63.631) Geophysical Journal International 199 1 102 112 |
institution |
Open Polar |
collection |
Natural Environment Research Council: NERC Open Research Archive |
op_collection_id |
ftnerc |
language |
unknown |
description |
We use shear wave splitting (SWS) above microearthquakes to monitor stress variations before the 2010 March and April flank and summit eruptions of Eyjafjallajökull volcano in Iceland. SWS time delays before Eyjafjallajökull show characteristic variations similar to those seen before earthquakes. The time delays display a nearly linear increase before the eruption, an abrupt change of slope and a rapid nearly linear decrease until the flank eruption begins. Similar variations before earthquakes are interpreted as stress-accumulation increases, and stress-relaxation decreases as microcracks coalesce onto the eventual fault plane. The changes in SWS before Eyjafjallajökull are interpreted as a similar stress-accumulation increase, as magma penetrates the crust, and stress-relaxation decrease as microcracks coalesce onto the magma conduit prior to magma release. We suggest that the remarkable similarity between stress changes before eruption and earthquake is strong evidence for the New Geophysics of a critically microcracked crust. |
format |
Article in Journal/Newspaper |
author |
Liu, S. Crampin, S. Luckett, R. Yang, J. |
spellingShingle |
Liu, S. Crampin, S. Luckett, R. Yang, J. Changes in shear wave splitting before the 2010 Eyjafjallajokull eruption in Iceland |
author_facet |
Liu, S. Crampin, S. Luckett, R. Yang, J. |
author_sort |
Liu, S. |
title |
Changes in shear wave splitting before the 2010 Eyjafjallajokull eruption in Iceland |
title_short |
Changes in shear wave splitting before the 2010 Eyjafjallajokull eruption in Iceland |
title_full |
Changes in shear wave splitting before the 2010 Eyjafjallajokull eruption in Iceland |
title_fullStr |
Changes in shear wave splitting before the 2010 Eyjafjallajokull eruption in Iceland |
title_full_unstemmed |
Changes in shear wave splitting before the 2010 Eyjafjallajokull eruption in Iceland |
title_sort |
changes in shear wave splitting before the 2010 eyjafjallajokull eruption in iceland |
publisher |
Oxford University Press |
publishDate |
2014 |
url |
http://nora.nerc.ac.uk/id/eprint/511803/ https://doi.org/10.1093/gji/ggu202 |
long_lat |
ENVELOPE(-19.633,-19.633,63.631,63.631) |
geographic |
Eyjafjallajokull |
geographic_facet |
Eyjafjallajokull |
genre |
Eyjafjallajökull Iceland |
genre_facet |
Eyjafjallajökull Iceland |
op_relation |
Liu, S.; Crampin, S.; Luckett, R.; Yang, J. 2014 Changes in shear wave splitting before the 2010 Eyjafjallajokull eruption in Iceland. Geophysical Journal International, 199 (1). 102-112. https://doi.org/10.1093/gji/ggu202 <https://doi.org/10.1093/gji/ggu202> |
op_doi |
https://doi.org/10.1093/gji/ggu202 |
container_title |
Geophysical Journal International |
container_volume |
199 |
container_issue |
1 |
container_start_page |
102 |
op_container_end_page |
112 |
_version_ |
1766405288976449536 |