Plate boundary deformation and man-made subsidence around geothermal fields on the Reykjanes Peninsula, Iceland

Handle URI:
http://hdl.handle.net/10754/561490
Title:
Plate boundary deformation and man-made subsidence around geothermal fields on the Reykjanes Peninsula, Iceland
Authors:
Keiding, Marie; Árnadóttir, Thóra; Jonsson, Sigurjon ( 0000-0001-5378-7079 ) ; Decriem, Judicaël; Hooper, Andrew John
Abstract:
We present Interferometric Synthetic Aperture Radar (InSAR) data from 1992-1999 and 2003-2008 as well as GPS data from 2000-2009 for the active plate boundary on the Reykjanes Peninsula, southwest Iceland. The geodetic data reveal deformation mainly due to plate spreading, anthropogenic subsidence caused by geothermal fluid extraction and, possibly, increasing pressure in a geothermal system. Subsidence of around 10. cm is observed during the first 2. years of production at the Reykjanes geothermal power plant, which started operating in May 2006. We model the surface subsidence around the new power plant using point and ellipsoidal pressure sources in an elastic halfspace. Short-lived swarms of micro-earthquakes as well as aseismic fault movement are observed near the geothermal field following the start of production, possibly triggered by the stresses induced by geothermal fluid extraction. © 2010 Elsevier B.V.
KAUST Department:
Physical Sciences and Engineering (PSE) Division; Environmental Science and Engineering Program; Crustal Deformation and InSAR Group
Publisher:
Elsevier BV
Journal:
Journal of Volcanology and Geothermal Research
Issue Date:
Jul-2010
DOI:
10.1016/j.jvolgeores.2010.04.011
Type:
Article
ISSN:
03770273
Sponsors:
The ERS and Envisat data were provided by the European Space Agency. We thank Halldor. Geirsson for providing the continuous GPS data, and Halldor Olafsson for skilled and cheerful assistance during numerous GPS campaigns. The earthquake locations, magnitudes and focal mechanisms included in this study are from the SIL seismic catalogue courtesy of the Icelandic Meteorological Office. Pall Jonsson and Gudmundur Omar Fridleifsson provided the pressure data from the Reykjanes geothermal field. We thank Maurizio Battaglia and Yuri Fialko for the codes for computing displacements and stresses due to an ellipsoidal source. Pall Einarsson, Grimur Bjornsson, Ingvar Thor Magnusson and Omar Sigurdsson are thanked for insightful comments. We are also grateful to Thomas R. Walter and an anonymous reviewer for constructive reviews that helped improving the paper. The figures were prepared using the GMT software (Wessel and Smith, 1998). This work is supported by a grant from the Eimskip Fund of the University of Iceland. Funding for GPS equipment used in this study came from the Icelandic Research Fund, the University of Arizona and NSF.
Appears in Collections:
Articles; Environmental Science and Engineering Program; Physical Sciences and Engineering (PSE) Division

Full metadata record

DC FieldValue Language
dc.contributor.authorKeiding, Marieen
dc.contributor.authorÁrnadóttir, Thóraen
dc.contributor.authorJonsson, Sigurjonen
dc.contributor.authorDecriem, Judicaëlen
dc.contributor.authorHooper, Andrew Johnen
dc.date.accessioned2015-08-02T09:12:39Zen
dc.date.available2015-08-02T09:12:39Zen
dc.date.issued2010-07en
dc.identifier.issn03770273en
dc.identifier.doi10.1016/j.jvolgeores.2010.04.011en
dc.identifier.urihttp://hdl.handle.net/10754/561490en
dc.description.abstractWe present Interferometric Synthetic Aperture Radar (InSAR) data from 1992-1999 and 2003-2008 as well as GPS data from 2000-2009 for the active plate boundary on the Reykjanes Peninsula, southwest Iceland. The geodetic data reveal deformation mainly due to plate spreading, anthropogenic subsidence caused by geothermal fluid extraction and, possibly, increasing pressure in a geothermal system. Subsidence of around 10. cm is observed during the first 2. years of production at the Reykjanes geothermal power plant, which started operating in May 2006. We model the surface subsidence around the new power plant using point and ellipsoidal pressure sources in an elastic halfspace. Short-lived swarms of micro-earthquakes as well as aseismic fault movement are observed near the geothermal field following the start of production, possibly triggered by the stresses induced by geothermal fluid extraction. © 2010 Elsevier B.V.en
dc.description.sponsorshipThe ERS and Envisat data were provided by the European Space Agency. We thank Halldor. Geirsson for providing the continuous GPS data, and Halldor Olafsson for skilled and cheerful assistance during numerous GPS campaigns. The earthquake locations, magnitudes and focal mechanisms included in this study are from the SIL seismic catalogue courtesy of the Icelandic Meteorological Office. Pall Jonsson and Gudmundur Omar Fridleifsson provided the pressure data from the Reykjanes geothermal field. We thank Maurizio Battaglia and Yuri Fialko for the codes for computing displacements and stresses due to an ellipsoidal source. Pall Einarsson, Grimur Bjornsson, Ingvar Thor Magnusson and Omar Sigurdsson are thanked for insightful comments. We are also grateful to Thomas R. Walter and an anonymous reviewer for constructive reviews that helped improving the paper. The figures were prepared using the GMT software (Wessel and Smith, 1998). This work is supported by a grant from the Eimskip Fund of the University of Iceland. Funding for GPS equipment used in this study came from the Icelandic Research Fund, the University of Arizona and NSF.en
dc.publisherElsevier BVen
dc.subjectGeothermal fieldsen
dc.subjectInterferometric Synthetic Aperture Radar (InSAR)en
dc.subjectMan-made subsidenceen
dc.subjectPlate boundaryen
dc.subjectTriggered earthquakesen
dc.titlePlate boundary deformation and man-made subsidence around geothermal fields on the Reykjanes Peninsula, Icelanden
dc.typeArticleen
dc.contributor.departmentPhysical Sciences and Engineering (PSE) Divisionen
dc.contributor.departmentEnvironmental Science and Engineering Programen
dc.contributor.departmentCrustal Deformation and InSAR Groupen
dc.identifier.journalJournal of Volcanology and Geothermal Researchen
dc.contributor.institutionNordic Volcanological Centre, Institute of Earth Sciences, University of Iceland, Icelanden
dc.contributor.institutionDelft Institute of Earth Observation and Space Systems, Delft University of Technology, Netherlandsen
kaust.authorJonsson, Sigurjonen
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