Staff profiles

Sigrún HreinsdóttirGeodetic Scientist

Hreinsdottir Sigrun 3267

Pronouns

she/her

Department

Geodynamics

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Biography

Sigrún is a Senior Geodetic Scientist within the Earth Structure and Processes Department. Her expertise is using GNSS (GPS) geodetic measurements to study deformation of the Earth's surface with focus on Plate Boundary deformation processes, Active Tectonics, Earthquake and Postseismic Deformation, Volcanic Deformation and Vertical Land Movement.

Qualifications

  • BSc, Physics
  • MSc, Geophysics
  • PhD, Geophysics

Areas of expertise

  • Geophysics: Geodetic data analysis
  • Geophysics: Crustal deformation and neotectonics
  • Geophysics: Earthquake analysis
  • Geophysics: Geodynamics
  • Geophysics: GNSS
  • Geophysics: Volcano Geophysics
  • Geophysics: Volcano Geodesy
  • Geophysics: GPS
  • Geophysics: Vertical Land movement

Major Publications

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  • Juncu, D.; Árnadóttir, Th.; Geirsson, H.; Guðmundsson, G.B.; Lund, B.; Gunnarsson, G.; Hooper, A.; Hreinsdottir, S.; Michalczewska, K. 2020. Injection-induced surface deformation and seismicity at the Hellisheidi geothermal field, Iceland, Journal of Volcanology and Geothermal Research 391: article 106337. DOI: 10.1016/j.jvolgeores.2018.03.019. article 106337
  • Gudjónsdóttir, S.R.; Ilyinskaya, E.; Hreinsdottir, S.; Bergsson, B.; Pfeffer, M.A.; Michalczewska, K.; Aiuppa, A.; Óladóttir, A.A. 2020. Gas emissions and crustal deformation from the Krýsuvík high temperature geothermal system, Iceland, Journal of Volcanology and Geothermal Research 391: article 106350. DOI: 10.1016/j.jvolgeores.2018.04.007. article 106350
  • Einarsson, P.; Hjartardóttir, Á.R.; Hreinsdottir, S.; Imsland, P. 2020. The structure of seismogenic strike-slip faults in the eastern part of the Reykjanes Peninsula Oblique Rift, SW Iceland, Journal of Volcanology and Geothermal Research 391: article 106372. DOI: 10.1016/j.jvolgeores.2018.04.029. article 106372
  • Grapenthin, R.; Hreinsdottir, S.; van Eaton, A. 2018. Volcanic hail detected with GPS : the 2011 eruption of Grímsvötn Volcano, Iceland, Geophysical Research Letters 45(22): DOI: 10.1029/2018GL080317.
  • Árnadóttir, T.; Haines, A.J.; Geirsson, H.; Hreinsdottir, S. 2018. A preseismic strain anomaly detected before the M6 earthquakes in the South Iceland Seismic Zone from GPS station velocities, Journal of Geophysical Research. Solid Earth 123(12): p. 11,091-11,111. DOI: 10.1029/2018JB016068. p. 11,091-11,111
  • Wallace, L.M.; Hreinsdottir, S.; Ellis, S.M.; Hamling, I.J.; D'Anastasio, E.; Denys, P. 2018. Triggered slow slip and afterslip on the southern Hikurangi subduction zone following the Kaikoura earthquake, Geophysical Research Letters 45(10): p. 4710-4718. DOI: 10.1002/2018GL077385. p. 4710-4718
  • Drouin, V.; Sigmundsson, F.; Verhagen, S.; Ofeigsson, B.G.; Spaans, K.; Hreinsdottir, S. 2017. Deformation at Krafla and Bjarnarflag geothermal areas, Northern Volcanic Zone of Iceland, 1993–2015, Journal of Volcanology and Geothermal Research 344: p. 92-105. DOI: 10.1016/j.jvolgeores.2017.06.013. p. 92-105
  • Parks, M.M.; Heimisson, E.R.; Sigmundsson, F.; Hooper, A.; Vogfjoerd, K.S.; Arnadottir, T.; Ofeigsson, B.; Hreinsdottir, S.; Hjartardottir, A.R.; Einarsson, P.; Gudmundsson, M.T.; Högnadottir, T.; Jonsdottir, K.; Hensch, M.; Bagnardi, M.; Dumont, S.; Drou 2017. Evolution of deformation and stress changes during the caldera collapse and dyking at Bárdarbunga, 2014–2015 : implication for triggering of seismicity at nearby Tungnafellsjökull volcano, Earth and Planetary Science Letters 462: p. 212-223. DOI: 10.1016/j.epsl.2017.01.020. p. 212-223
  • Compton, K.; Bennett, R.A.; Hreinsdottir, S.; van Dam, T.; Bordoni, A.; Berletta, V.; Spada, G. 2017. Short-term variations of Icelandic ice cap mass inferred from cGPS coordinate time series, Geochemistry Geophysics Geosystems 18(6): p. 2099–2119. DOI: 10.1002/2017GC006831. p. 2099–2119
  • Drouin, V.; Sigmundsson, F.; Ófeigsson, B.G.; Hreinsdottir, S.; Sturkell, E.; Einarsson, P. 2017. Deformation in the Northern Volcanic Zone of Iceland 2008-2014 : an interplay of tectonic, magmatic, and glacial isostatic deformation, Journal of Geophysical Research. Solid Earth 122(4): p. 3158-3178. DOI: 10.1002/2016JB013206. p. 3158-3178
  • Hamling, I.J.; Hreinsdottir, S.; Clark, K.J.; Elliot, J.; Liang, C.; Fielding, E.; Litchfield, N.J.; Villamor, P.; Wallace, L.M.; Wright, T.J.; D'Anastasio, E.; Bannister, S.; Burbidge, D.R.; Denys, P.; Gentle, P.; Howarth, J.D.; Mueller, C.; Palmer, N.G. 2017. Complex multifault rupture during the 2016 Mw 7.8 Kaikoura earthquake, New Zealand, Science 356(6334): eaam7194. DOI: 10.1126/science.aam7194. eaam7194
  • Clark, K.J.; Nissen, E.K.; Howarth, J.D.; Hamling, I.J.; Mountjoy, J.J.; Ries, W.F.; Jones, K.E.; Goldstein, S.; Cochran, U.A.; Villamor, P.; Hreinsdottir, S.; Litchfield, N.J.; Mueller, C.; Berryman, K.R.; Strong, D.T. 2017. Highly variable coastal deformation in the 2016 MW7.8 Kaikoura earthquake reflects rupture complexity along a transpressional plate boundary, Earth and Planetary Science Letters 474: p. 334-344. DOI: 10.1016/j.epsl.2017.06.048. p. 334-344
  • Wallace, L.M.; Kaneko, Y.; Hreinsdottir, S.; Hamling, I.J.; Peng, Z.; Bartlow, N.; D'Anastasio, E.; Fry, B. 2017. Large-scale dynamic triggering of shallow slow slip enhanced by overlying sedimentary wedge, Nature Geoscience 10(10): p. 765-770. DOI: 10.1038/ngeo3021. p. 765-770
  • Beavan, R.J.; Wallace, L.M.; Palmer, N.G.; Denys, P.; Ellis, S.M.; Fournier, N.; Hreinsdottir, S.; Pearson, C.; Denham, M. 2016. New Zealand GPS velocity field : 1995-2013, New Zealand Journal of Geology and Geophysics 59(1): p. 5-14. DOI: 10.1080/00288306.2015.1112817. p. 5-14
  • Hamling, I.J.; Hreinsdottir, S.; Bannister, S.; Palmer, N.G. 2016. Off-axis magmatism along a subaerial back-arc rift : observations from the Taupo Volcanic Zone, New Zealand, Science Advances 2(6): article e1600288. article e1600288
  • Gudmundsson, M.T.; Jonsdottir, K.; Hooper, A.; Holohan, E.P.; Halldorsson, S.A.; Ofeigsson, B.G.; Cesca, S.; Vogfjoerd, K.S.; Sigmundsson, F.; Hoegnadottir, T.; Einarsson, P.; Sigmarsson, O.; Jarosch, A.H.; Jonasson, K.; Magnusson, E.; Hreinsdottir, S.; B 2016. Gradual caldera collapse at Bárdarbunga volcano, Iceland, regulated by lateral magma outflow, Science 353(6296): article no. aaf8988. DOI: 10.1126/science.aaf8988. article no. aaf8988
  • Hurst, A.W.; Heise, W.; Hreinsdottir, S.; Hamling, I.J. 2016. Geophysics of the Taupo Volcanic Zone : a review of recent developments, Taupo Volcanic Zone geothermal systems, New Zealand: Exploration, science and development : p. 188-204. DOI: 10.1016/j.geothermics.2015.09.008. Geothermics 59B p. 188-204
  • Drouin, V.; Heki, K.; Sigmundsson, F.; Hreinsdottir, S.; Ofeigsson, B.G. 2016. Constraints on seasonal load variations and regional rigidity from continuous GPS measurements in Iceland, 1997–2014, Geophysical Journal International 205(3): p. 1843-1858. DOI: 10.1093/gji/ggw122. p. 1843-1858
  • Hamling, I.J.; Williams, C.A.; Hreinsdottir, S. 2016. Depressurization of a hydrothermal system following the August and November 2012 Te Maari eruptions of Tongariro, New Zealand, Geophysical Research Letters 43(1): p. 168-175. DOI: 10.1002/2015GL067264. p. 168-175
  • Hamling, I.J.; Hreinsdottir, S. 2016. Reactivated afterslip induced by a large regional earthquake, Fiordland, New Zealand, Geophysical Research Letters 43(6): p. 2526–2533. DOI: 10.1002/2016GL067866. p. 2526–2533
  • Hamling, I.J.; Hreinsdottir, S.; Fournier, N. 2015. The ups and downs of the TVZ : geodetic observations of deformation around the Taupo Volcanic Zone, New Zealand, Journal of Geophysical Research. Solid Earth 120(6): p. 4667-4679. DOI: 10.1002/2015JB012125. p. 4667-4679
  • Spaans, K.; Hreinsdottir, S.; Hooper, A.; Ofeigsson, B.G. 2015. Crustal movements due to Iceland's shrinking ice caps mimic inflow signal at Katla volcano, Scientific Reports 5: article number 10285. DOI: 10.1038/srep10285. article number 10285
  • Sigmundsson, F.; Hooper, A.; Hreinsdottir, S.; Vogfjord, K.S.; Ofeigsson, B.G.; Heimisson, E.R.; Dumont, S.; Parks, M.; Spaans, K.; Gudmundsson, G.B.; Drouin, V.; Arnadóttir, T.; Jonsdottir, K.; Gudmundsson, M.T.; Hognadottir, T.; Fridriksdottir, H.M.; He 2015. Segmented lateral dyke growth in a rifting event at Bárðarbunga volcanic system, Iceland, Nature 517(7533): p. 191-195. DOI: 10.1038/nature14111. p. 191-195
  • Compton, K.; Bennett, R.A.; Hreinsdottir, S. 2015. Climate-driven vertical acceleration of Icelandic crust measured by continuous GPS geodesy, Geophysical Research Letters 42(3): p. 743-750. DOI: 10.1002/2014GL062446. p. 743-750
  • Hjaltadottir, S.; Vogfjoerth, K.S.; Hreinsdottir, S.; Slunga, R. 2015. Reawakening of a volcano : activity beneath Eyjafjallajökull Volcano from 1991 to 2009, Journal of Volcanology and Geothermal Research 304: p. 194-205. DOI: 10.1016/j.jvolgeores.2015.08.001. p. 194-205
  • Sigurthardottir, S.S.; Guthmundsson, M.T.; Hreinsdottir, S. 2015. Mapping of the Eldgjá lava flow on Mýrdalssandur with magnetic surveying, Jökull 65: p. 61-72. p. 61-72
  • Hamling, I.J.; D'Anastasio, E.; Wallace, L.M.; Ellis, S.M.; Motagh, M.; Samsonov, S.; Palmer, N.G.; Hreinsdottir, S. 2014. Crustal deformation and stress transfer during a propagating earthquake sequence : the 2013 Cook Strait sequence, Central New Zealand, Journal of Geophysical Research. Solid Earth 119(7): p. 6080-6092. DOI: 10.1002/2014JB011084. p. 6080-6092
  • Hreinsdottir, S.; Sigmundsson, F.; Roberts, M.J.; Bjornsson, H.; Grapenthin, R.; Arason, P.; Arnadottir, T.; Holmjarn, J.; Geirsson, H.; Bennett, R.A.; Gudmundsson, M.T.; Oddsson, B.; Ofeigsson, B.G.; Villemin, T.; Jonsson, T.; Sturkell, E.; Hoskuldsson, 2014. Volcanic plume height correlated with magma-pressure change at Grímsvötn Volcano, Iceland, Nature Geoscience 7(3): p. 214-218. DOI: 10.1038/ngeo2044. p. 214-218
  • Metzger, S.; Jonsson, S.; Danielsen, G.; Hreinsdottir, S.; Jouanne, F.; Giardini, D.; Villemin, T. 2013. Present kinematics of the Tjörnes Fracture Zone, North Iceland, from campaign and continuous GPS measurements, Geophysical Journal International 192(2): p. 441-455. DOI: 10.1093/gji/ggs032. p. 441-455
  • Geirsson, H.; LaFemina, P.; Arnadottir, T.; Sturkell, E.; Sigmundsson, F.; Travis, M.; Schmidt, P.; Lund, B. Hreinsdottir, S.; Bennett, R. 2012. Volcano deformation at active plate boundaries : deep magma accumulation at Hekla volcano and plate boundary deformation in south Iceland, Journal of Geophysical Research. Solid Earth 117: B11409. DOI: 10.1029/2012JB009400. B11409
  • Bennett, R.A.; Serpelloni, E.; Hreinsdottir, S.; Brandon, M.T.; Buble, G.; Basic, T.; Casale, G.; Cavaliere, A.; Anzidei, M.; Marjonovic, M.; Minelli, G.; Molli, G.; Montanari, A. 2012. Syn-convergent extension observed using the RETREAT GPS network, northern Apennines, Italy, Journal of Geophysical Research. Solid Earth 117(B4): B04408. DOI: 10.1029/2011jb008744. B04408
  • Geirsson, H.; Arnadottir, T.; Hreinsdottir, S.; Decriem, J.; LaFemina, P.C.; Jonsson, S.; Bennett, R.A.; Metzger, S.; Holland, A.; Sturkell, E.; Villemin, T.; Volsken, C.; Sigmundsson, F.; Einarsson, P.; Roberts, M.J.; Sveinbjornsson, H. 2010. Overview of results from continuous GPS observations in Iceland from 1995-2010, Jökull 60: p. 3-22. p. 3-22
  • Sigmundsson, F.; Hreinsdottir, S.; Hooper, A.; Árnadóttir, T.; Pedersen, R.; Roberts, M.J.; Óskarsson, N.; Auriac, A.; Decriem, J.; Einarsson, P.; Geirsson, H.; Hensch, M. Ófeigsson, B.G.; Sturkell, E.; Sveinbjoernsson, H.; Feigl, K.L. 2010. Intrusion triggering of the 2010 Eyjafjallajökull explosive eruption, Nature 468(7322): p. 426-430. DOI: 10.1038/nature09558. p. 426-430
  • Spinler, J.C.; Bennett, R.A.; Anderson, M.L.; McGill, S.F.; Hreinsdottir, S.; McCallister, A. 2010. Present-day strain accumulation and slip rates associated with southern San Andreas and eastern California shear zone faults, Journal of Geophysical Research. Solid Earth 115(B11): B11407. DOI: 10.1029/2010JB007424. B11407
  • Decriem, J.; Árnadóttir, T.; Hooper, A.; Geirsson, H.; Keiding, M.; Ófeigsson, B.G.; Sigmundsson, F.; Hreinsdottir, S.; LaFemina, P.; Bennett, R. 2010. The 2008 May 29 earthquake doublet in SW Iceland, Geophysical Journal International 181(2): p. 1128-1146. DOI: 10.1111/j.1365-246X.2010.04565.x. p. 1128-1146
  • Buble, G.; Bennett, R.A.; Hreinsdottir, S. 2010. Tide gauge and GPS measurements of crustal deformation and sea level rise along the eastern margin of Adria, Journal of Geophysical Research. Solid Earth 115(B2): B02404. DOI: 10.1029/2008JB006155. B02404
  • Hreinsdottir, S.; Arnadottir, T.; Decrim, J.; Geirsson, H.; Tyggvasson, A.; Bennett, R.A.; LaFemina, P. 2009. A complex earthquake sequence captured by the continuous GPS network in SW Iceland, Geophysical Research Letters 36(12): L12309. DOI: 10.1029/2009GL038391. L12309
  • Bennett, R.A.; Fay, N.P.; Hreinsdottir, S.; Chase, C.; Zandt, G. 2009. Increasing long-wavelength relief across the southeastern flank of the Sierra Nevada, California, Earth and Planetary Science Letters 287(1/2): p. 255-264. DOI: 10.1016/j.epsl.2009.08.011. p. 255-264
  • Hreinsdottir, S.; Bennett, R.A. 2009. Active aseismic creep on the Alto Tiberina low-angle normal fault, Italy, Geology 37(8): p. 683-686. DOI: 10.1130/G30194A.1. p. 683-686
  • Velasco, M.S.; Bennett, R.A.; Johnson, R.A.; Hreinsdottir, S. 2009. Subsurface fault geometries and crustal extension in the eastern Basin and Range Province, western US, Tectonophysics 488(1-4): p. 131-142. DOI: 10.1016/j.tecto.2009.05.010. p. 131-142
  • Fay, N.P.; Bennett, R.A.; Hreinsdottir, S. 2008. Contemporary vertical velocity of the central Basin and Range and uplift of the southern Sierra Nevada, Geophysical Research Letters 35(20): L20309. DOI: 10.1029/2008GL034949. L20309
  • Bennett, R.A.; Hreinsdottir, S.; Buble, G.; Basic, T.; Bacic, Z.; Marjanovic, M.; Casale, G.; Gendaszek, A.; Cowan, D. 2008. Eocene to present subduction of southern Adria mantle lithosphere beneath the Dinarides, Geology 36(1): p. 3-6. DOI: 10.1130/G24136A.1. p. 3-6
  • Freymueller, J.T.; Woodard, H.; Cohen, S.C.; Cross, R.; Elliott, J.; Larsen, C.F.; Hreinsdottir, S.; Zweck, C. 2008. Active deformation processes in Alaska, based on 15 years of GPS measurements, Active Tectonics and Seismic Potential of Alaska : p. 1-42. DOI: 10.1029/179GM02. p. 1-42
  • Pagli, C.; Sigmundsson, F.; Lund, B.; Sturkell, E.; Geirsson, H.; Einarsson, P.; Arnadottir, T.; Hreinsdottir, S. 2007. Glacio-isostatic deformation around the Vatnajokull ice cap, Iceland, induced by recent climate warming : GPS observations and finite element modeling, Journal of Geophysical Research. Solid Earth 112(B8): B08405. DOI: 10.1029/2006JB004421. B08405
  • Bennett, R.A.; Hreinsdottir, S.; Velasco, M.S.; Fay, N.P. 2007. GPS constraints on vertical crustal motion in the northern Basin and Range, Geophysical Research Letters 34(22): L22319. DOI: 10.1029/2007GL031515. L22319
  • Bennett, R.A.; Hreinsdottir, S. 2007. Constraints on relative vertical crustal motion for long baselines in the central Mediterranean region using continuous GPS, Earth and Planetary Science Letters 257(3/4): p. 419-434. DOI: 10.1016/j.epsl.2007.03.008. p. 419-434
  • Freed, A.M.; Burgmann, R.; Calais, E.; Freymueller, J.; Hreinsdottir, S. 2006. Implications of deformation following the 2002 Denali, Alaska, earthquake for postseismic relaxation processes and lithospheric rheology, Journal of Geophysical Research. Solid Earth 111(B1): B01401. DOI: 10.1029/2005JB003894. B01401
  • Ohta, Y.; Freymueller, J.T.; Hreinsdottir, S.; Suito, H. 2006. A large slow slip event and the depth of the seismogenic zone in the south central Alaska subduction zone, Earth and Planetary Science Letters 247(1/2): p. 108-116. DOI: 10.1016/j.epsl.2006.05.013. p. 108-116
  • Hreinsdottir, S.; Freymueller, J.T.; Burgmann, R.; Mitchell, J. 2006. Coseismic deformation of the 2002 Denali Fault earthquake: Insights from GPS measurements, Journal of Geophysical Research. Solid Earth 111(B3): B03308. DOI: 10.1029/2005JB003676. B03308
  • Sturkell, E.; Einarsson, L.; Sigmundsson, F.; Hreinsdottir, S.; Geirsson, H. 2003. Deformation of Grimsvotn volcano, Iceland : 1998 eruption and subsequent inflation, Geophysical Research Letters 30(4): 1182. DOI: 10.1029/2002GL016460. 1182
  • Hreinsdottir, S.; Freymueller, J.T.; Fletcher, H.J.; Larsen, C.F.; Burgmann, R. 2003. Coseismic slip distribution of the 2002 MW7.9 Denali fault earthquake, Alaska, determined from GPS measurements, Geophysical Research Letters 30(13): 1670. DOI: 10.1029/2003GL017447. 1670
  • Eberhart-Phillips, D.; Haeussler, P.J.; Freymueller, J.T.; Frankel, A.D.; Rubin, C.M.; Craw, P.; Ratchkovski, N.A.; Anderson, G.; Carver, G.A.; Crone, A.J.; Dawson, T.E.; Fletcher, H.; Hansen, R.; Harp, E.L.; Harris, R.A.; Hill, D.P.; Hreinsdottir, S.; Ji 2003. The 2002 Denali Fault earthquake, Alaska : a large magnitude, slip-partitioned event, Science 300(5622): p. 1113-1118. p. 1113-1118
  • Hreinsdottir, S.; Einarsson, P.; Sigmundsson, F. 2001. Crustal deformation at the oblique spreading Reykjanes Peninsula, SW Iceland : GPS measurements from 1993 to 1998, Journal of Geophysical Research. Solid Earth 106(B7): p. 13803-13816. DOI: 10.1029/2001JB000428. p. 13803-13816
  • Arnadottir, T.; Hreinsdottir, S.; Gudmundsson, G.; Einarsson, P.; Heinert, M.; Volksen, C. 2001. Crustal deformation measured by GPS in the South Iceland Seismic Zone due to two large earthquakes in June 2000, Geophysical Research Letters 28(21): p. 4031-4033. DOI: 10.1029/2001GL013332. p. 4031-4033

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