Ritskrá / Publications

Freysteinn Sigmundsson
Október 2006

 
- Nature News and Views

Freysteinn Sigmundsson, Plate tectonics: Magma does the splits, Nature, 442, 251-252, 2006.

 - Bók / Book

Sigmundsson, F. (2006), Iceland Geodynamics, Crustal Deformation and Divergent Plate Tectonics, Praxis Publishing - Springer Verlag, Chichester, UK, 209 pp.
 


 - Ritrýndar greinar og bókarkaflar / Reviewed papers

 

Pagli, C., and F. Sigmundsson, Will present day glacier retreat increase volcanic activity? Stress induced by recent glacier retreat and its effect on magmatism at the Vatnajökull ice cap, Iceland, Geophys. Res. Lett., 35, L09304, doi:10.1029/2008GL033510, 2008.
 
Sturkell, E., Einarsson, P., Roberts, M.J., Geirsson, H., Gudmundsson, M.T., Sigmundsson, F., Pinel, V., Gudmundsson, G.B., Olafsson, H., & Stefansson, R., Seismic and geodetic insights into magma accumulation at Katla subglacial volcano, Iceland: 1999 to 2005Journal of Geophysical Research, 113, B03212, 2008.
 
Sturkell, E., Sigmundsson, F., Geirsson, H., Ólafsson, H., & Theodórsson, Th., Multiple volcano deformation sources in a post-rifting period: 1989-2005 behaviour of Krafla, Iceland constrained by levelling, tilt and GPS observations. Journal of Volcanology and Geothermal Research, 177 (2), 405-417, 2008.
 
Dubois, L., Feigl., K., Komatitsch, D., Árnadóttir, Th. and F. Sigmundsson, Three-dimensional mechanical models for the June 2000 earthquake sequence in the south Iceland seismic zone, Tectonophysics, 12-29, 2008.
 
Ólafur Ingólfsson, Olgeir Sigmarsson, Freysteinn Sigmundsson og Leifur A. Símonarson, 2008. The dynamic geology of Iceland, Jökull, 58, 1-2, 2008.
 
Gee, D. G., Brekke, H., Lahtinen, R., Sigmundsson, F., Sundquist, B., Thybo, H. and Weihed, P. 2008. Nordic Geoscience and the 33rd International Geological Congress: Introduction, Episodes, 31, 4-8.
Nadim, F., Pedersen, S.A.S, Schmidt-Thomé, P., Sigmundsson, F. and Engdahl, M., 2008. Natural hazards in Nordic countries, Episodes, 31, 176-184.

Sigmundsson, F. and Sćmundsson, K., 2008. Iceland: a window on North-Atlantic divergent plate tectonics and geologic processes, Episodes, 31, 92-97.

Pinel, V., F. Sigmundsson, E. Sturkell, H. Geirsson, P. Einarsson, M.T. Gudmundsson, and Th. Högnadóttir, 2007. Discriminating volcano deformation due
to magma movement and variable loads:  Application to Katla subglacial volcano, Iceland, Geophys. J. Int., 169, 325-338.

Pagli, C., F. Sigmundsson, B. Lund, E. Sturkell, H. Geirsson, P. Einarsson, Th. Árnadóttir, and S. Hreinsdóttir, 2007. Glacio-isostatic
deformation around the Vatnajökull ice cap, Iceland, induced by recent climate warming: GPS observations and Finite Element Modeling, J. Geophys.
Res., 112, B08405.

Pagli, C., F. Sigmundsson, R. Pedersen, P. Einarsson, Th. Árnadóttir and K. L. Feigl, 2007. Crustal deformation associated with the 1996 Gjálp subglacial
eruption, Iceland: InSAR studies in affected areas adjacent to the Vatnajökull ice cap, Earth and Planetary Science Letters, 259, 24-33.

Pedersen, R., F. Sigmundsson, Hooper, A. J. and Feigl, K. L., 2007. Extending the temporal coverage of Icelandic crustal deformation
measurements through ENVISAT InSAR images, paper ESA SP-636, 2007, Proc. of the 2007 ENVISAT Symposium, Montreux, Switzerland, 23-27 April, 2007.

Pedersen, R., Freysteinn Sigmundsson and Páll Einarsson, 2007: Controlling factors on earthquake swarms associated with magmatic intrusions;
Constraints from Iceland, Journal of Volcanology and Geothermal Research,162,73-80.

Trota, A., Houlié, N., Briole, P., Gaspar, J.L., Sigmundsson, F. And K. L. Feigl, 2006. Deformation studies at Furnas and Sete Cidades Volcanoes (Sao Miguel Island, Azores). Velocities and further investigations, Geophys. J. Int., 166, 952-956.

Grapenthin, R., F. Sigmundsson, H. Geirsson , T. Arnadottir, V. Pinel, 2006. Icelandic rhythmics: Annual modulation of land elevation and plate spreading by snow load, Geophys. Res. Lett., 33, L24305.

Einarsson, P., F. Sigmundsson, E. Sturkell, Ţ. Árnadóttir, R. Pedersen, C. Pagli, H. Geirsson. Geodynamic signals detected by geodetic methods in Iceland. In: C. Hirt (editor), Festschrift for Prof. G. Seeber, Wissenschaftliche Arbeiten der Fachrichtung Geodäsie und Geoinformatik der Universität Hannover Nr. 258, 39-57, 2006.

Geirsson, H., Arnadottir, Th., Völksen, C, Jiang, W, Sturkell, E, Villemin, T., Einarsson, P., Sigmundsson, F., Stefansson, R, Current plate movements across the Mid-Atlantic Ridge determined from 5 years of continuous GPS measurements in Icleand, J. Geophys. Res., 111, B09407, 2006.

Sturkell, E., F. Sigmundsson, and R. Slunga, 2006. 1983-2003 decaying rate of deflation at Askja caldera: Pressure decrease in an extensive magma plumbing system at a spreading plate boundary, Bull. Volc., 68, 727-735.

Eliasson, J., G. Larsen, M. T. Gudmundsson, and F. Sigmundsson, 2006. Probabilistic model for eruptions and associated flood events in the Katla caldera, Iceland, Computational Geosciences, 10, 179-200.

de Zeeuw-van Dalfsen, E., Rymer, H., Williams-Jones, G., Sturkell, E., & Sigmundsson, F. 2006. The integration of micro-gravity and geodetic data at Krafla Volcano, N Iceland. Bulletin of Volcanology, 68, 420-431.

Pagli C., Sigmundsson, F., Árnadóttir, T., Einarsson, P., Sturkell, E., 2006. Deflation of the Askja volcanic system: contraints on the deformation source from combined inversion of satellite radar interferograms and GPS measurements, Journal of Volcanology and Geothermal Research, 152, 97-108.

Pedersen, R., Sigmundsson, F. 2006. Temporal development of the 1999 intrusive episode in the Eyjafjallajökull volcano, Iceland, derived from InSAR images, Bull. Volc., 68, 377-393.

Sturkell, E., P. Einarsson, F. Sigmundsson, H. Geirsson, H. Olafsson, R. Pedersen, E. de Zeeuw-van Dalfsen, A. L. Linde, I. S. Sacks, and R. Stefansson, 2006. Volcano geodesy and magma dynamics in Iceland, J. Volc. Geotherm. Res., 150, 14-34.

La Femina, P. C., Dixon, T. H., Malservisi, R., Árnadóttir, T., Sturkell, E., Sigmundsson, F., and Einarsson, P., Geodetic GPS measurements in South Iceland: Strain accumulation and portioning in a propagating ridge system, J. Geophys. Res., 110, B11405, 2005.

Einarsson, P., Sossalu, H., Sturkell, E., Sigmundsson, F., and Geirsson, H., Virkni í Kötlueldstöđinni og nágrenni hennar síđan 1999 og hugsanleg ţróun atburđarásar, in: Guđmundsson, M. T. and Gylfason, Á. G. (eds.) Hćttumat vegna eldgos og hlaupa frá vestanverđum Mýrdalsjökli and Eyjafjallajökli (in Icelandic), Ríkislögreglustjórinn, Háskólaútgáfan, 151-158, 2005.

Elíasson, J., Larsen, G., Guđmundsson, M. T. G., and F. Sigmundsson, Líkindi eldgosa, hlaupa og fćrslu eldvirkni milli svćđa innan Kötluöskjunnar, in: Guđmundsson, M. T. and Gylfason, Á. G. (eds.) Hćttumat vegna eldgos og hlaupa frá vestanverđum Mýrdalsjökli and Eyjafjallajökli (in Icelandic), Ríkislögreglustjórinn, Háskólaútgáfan, 135-150, 2005.

Elske van Dalfsen, Hazel Rymer, Freysteinn Sigmundsson and Erik Sturkell, Net gravity decrease at Askja volcano, Iceland: Constraints on processes responsible for continuous caldera deflation, 1988-2003, J. Volc. Geotherm. Res., 139, 227-239, 2005.

Pedersen, R., F. Sigmundsson, InSAR based sill model links spatially offset areas of deformation and seismicity for the 1994 unrest episode at Eyjafjallajökull volcano, Iceland, Gephys. Res. Lett., 31, L14610, 2004.

de Zeeuw-van Dalfsen, E., R. Pedersen, F. Sigmundsson, and C. Pagli, Deep accumulation of magma near crust-mantle boundary at the Krafla volcanic system, Iceland: Evidence from satellite radar interferometry 1993-1999, Gephys. Res. Lett., 31, L13611, 2004.

Gudmundsson, M.T., F. Sigmundsson, H. Bjornsson, and Th. Hognadottir, The 1996 eruption at Gjálp, Vatnajökull ice cap: Course of events, efficiency of heat transfer, ice deformation and subglacial water pressure, Bull. Volc., 66, 46-65, 2004.

Pedersen, R., S. Jónsson, Th. Árnadóttir, F. Sigmundsson, and K.L. Feigl, Fault slip distribution of two June 2000 Mw6.5 earthquakes in South Iceland estimated from joint inversion of InSAR and GPS measurements, Earth and Planet. Sci. Lett., vol. 213, p. 487-502, 2003.

Pagli, C., Pedersen, R., Sigmundsson, F. and Feigl, K., Triggered fault slip on June 17, 2000 on the Reykjanes Peninsula, SW-Iceland captured by radar interferometry, Geophys. Res. Lett., vol. 30 (6), 2003.

Sturkell, E., F. Sigmundsson, and P. Einarsson, 1994 and 1999 unrest and magma movements at Eyjafjallajökull and Katla volcanoes, Iceland, J. Geophys. Res., 108, 2369, 7, 2003.

Sturkell, E., P. Einarsson, F. Sigmundsson, H. Geirsson, H. Ólafsson, R. Ólafsdóttir, and G. Gunnarsson, Ţrýstingur vex undir Kötlu, Náttúrufrćđingurinn, 71 (3-4), 80-86, 2003.

Sturkell, E., and P. Einarsson, F. Sigmundsson, S. Hreinsdottir, and H. Geirsson, Deformation of Grímsvötn volcano, Iceland: 1998 eruption and subsequent inflation, Geophys. Res. Letters, 30, 1182, doi: 10.129/2002GL016460, 2003.

Clifton, A., F. Sigmundsson, K. Feigl, G. Gunnarsson, Th. Arnadottir, Surface effects of faulting and deformation resulting from magma accumulation at the Hengill triple junction, SW Iceland, 1994-1998, J. Volc. Geotherm. Res., 115, 233-255, 2002.

Gudmundsson, S., J. M. Carstensen, and F. Sigmundsson, Unwrapping ground displacement signals in satellite radar interferograms with aid of GPS data and MRF regularisation, IEEE Transactions on Geoscience and Remote Sensing., 40, 1743-1754, 2002.

Gudmundsson, S., M. T. Gudmundsson, H. Bjornsson, F. Sigmundsson, Three-dimensional glacier surface motion maps at the Gjálp eruption site, Iceland, inferred from combining InSAR and other ice displacement data., Annals of Glaciology, 34, 315-322, 2002.

Gudmundsson, S., F. Sigmundsson, J. M. Carstensen, Three-dimensional surface motion maps estimated from combined InSAR and GPS data, J. Geophys. Res., 107, 2002.

Hreinsdottir, S., P. Einarsson, and F. Sigmundsson, Crustal deformation at the oblique spreading Reykjanes Peninsula, SW-Iceland: GPS measurements from 1993 to 1998, J. Geophys. Res., 106, 13803-13816, 2001.

Pedersen, R., F. Sigmundsson, K.L. Feigl and Th. Árnadóttir, Coseismic interferograms of two Ms = 6.6 earthquakes in the South Iceland Seismic Zone, June, 2000, Geophys. Res. Lett., 28, 3341-3344, 2001.

Feigl, K., J. Gasperi, F. Sigmundsson, and A. Rigo, Crustal deformation near Hengill volcano, Iceland 1993-1998: Coupling between volcanism and faulting inferred from elastic modelling of satellite radar interferograms, J. Geophys. Res., 105, 25655-25670, 2000.

Gudmundsson, M. T., G. Larsen, H. Bjornsson, and F. Sigmundsson, Comment: Subglacial eruptions and synthetic aperture radar images, EOS, Transaction of the American Geophysical Union, 81, 134-135 and 140, 2000.

Johnsson, D. J., F. Sigmundsson, and P. T. Delaney, Comment on “Volume of magma accumulation or withdrawal estimated from surface uplift or subsidence, with application to the 1960 collapse of Kilauea volcano” by P.T. Delaney and D.F. McTigue, Bull. Volc., 61, 491-493, 2000.

Massonnet, D. and F. Sigmundsson, Remote sensing of volcano deformation by radar interferometry from various satellites, In: Remote sensing of volcanoes, Am. Geophys. Union Geophysical Monograph vol. 116, 207-221, 2000.

Sturkell, E. and F. Sigmundsson, Continuous deflation of the Askja caldera Iceland, during the 1983-1998 non-eruptive period, J. Geophys. Res., 25671-25684, 2000.

Alex, N., P. Einarsson, M. Heinert, W. Niemeier, F. Sigmundsson, S. Willgalis, GPS-Meßkampagne 1995 zur Bestimmung von Deformationen der Erdkruste in Südwestisland, Zeitschrift für Vermessungswesen, 124, 377-388, 1999.

Jonsson, S., M. M. Alves, and F. Sigmundsson, Low rates of deformation of the Furnas and Fogo volcanoes, Sao Miguel, Azores, observed with the Global Positioning System, 1993-1997, J. Volc. Geotherm. Res., 92, 83-94, 1999.

Sigmundsson, F., P. Durand, and D. Massonnet, Opening of an eruptive fissure and seaward displacement at Piton de la Fournaise volcano measured by RADARSAT satellite radar interferometry, Geophys. Res. Lett., 26, 533-536, 1999.

Arnadottir, Th., F. Sigmundsson, and P. T. Delaney, Sources of crustal deformation associated with the Krafla, Iceland, eruption of September 1984, Geophys. Res. Lett., 25, 1043-1046, 1998.

Giannopoulos, G., E. Lagios and F. Sigmundsson, Global Positioning System (GPS) monitoring of Santorini volcano, The European Laboratory Volcanoes, Proceedings of the Second workshop held in Santorini, Greece, 2-4 May 1996, edited by R. Casale et al., pp. 271-279, European Commission, Brussels, 1998.

Rymer, H., J. Cassidy, C. A. Locke, and F. Sigmundsson, Post-eruptive gravity changes from 1990 to 1996 at Krafla volcano, Iceland, J. Volc. Geotherm. Res., 87, 141-149, 1998.

Einarsson, P., B. Brandsdottir, M. T. Gudmundsson, H. Bjornsson, K. Gronvold, and F. Sigmundsson, Center of the Iceland hotspot experiences volcanic unrest, EOS, Transaction of the American Geophysical Union, 70, 369-375, 1997.

Gudmundsson, M. T., F. Sigmundsson, and H. Bjornsson, Ice-volcano interaction of the 1996 Gjalp subglacial eruption, Vatnajokull, Iceland, Nature, 389, 954-957, 1997.

Jonsson, S., P. Einarsson, and F. Sigmundsson, Extension across a divergent plate boundary, the Eastern Volcanic Rift Zone, south Iceland, 1967-1994, observed with GPS and electronic distance measurements, J. Geophys. Res., 102, 11913-11929, 1997.

Sigmundsson F., H. Vadon, and D. Massonnet, Readjustment of the Krafla spreading segment to crustal rifting measured by satellite radar interferometry, Geophys. Res. Lett., 24, 1843-1846, 1997.

Sigmundsson, F., P. Einarsson, S. Th. Rognvaldsson, G. R. Foulger, K. M. Hodgkinson, G. Thorbergsson, The 1994-1995 seismicity and deformation at the Hengill triple junction, Iceland: Triggering of earthquakes by minor magma injection in a zone of horizontal shear stress, J. Geophys. Res., 102, 15151-15161, 1997.

Vadon H., and F. Sigmundsson, Crustal deformation from 1992-1995 at the Mid-Atlantic Ridge, SW Iceland, mapped by satellite radar interferometry, Science, 275, 193-197, 1997.

Wolf, D., F. Barthelmes, and F. Sigmundsson, Predictions of deformation and gravity change caused by recent melting of the Vatnajokull ice cap, Iceland, in: Gravity, Geoid, and Marine Geodesy, edited by Segawa, J., Fujimoto, H., and S. Okubo, pp. 311-319, Springer-Verlag, Berlin, 1997.

Wolf, D., F. Barthelmes, and F. Sigmundsson, Predictions of deformation and gravity change caused by recent melting of the Vatnajokull ice cap, Iceland, in: Compt. Rend. J. Luxemb. Geodyn., 82, 36-42, 1997.

Einarsson, P., F. Sigmundsson, M. A. Hofton, G. R. Foulger, and W. Jacoby, An experiment in glacio-isostasy near Vatnajokull, Iceland, 1991, Jokull, 44, 29-39, 1996.

Sigmundsson, F. and P. Einarsson, The south Iceland seismic zone: Crustal deformation from GPS measurements (in Icelandic), Natturufraedingurinn, 66, 37-46, 1996.

Sigmundson, F., Crustal deformation at volcanoes, in Proceedings of the Course: The Mitigation of Volcanic Hazards, European School of Climatology and Natural Hazards, held on Vulcano, Sicily, 12-18 June 1994, edited by F. Barberi and R. Casale, European Commission, ECSC-EC-EAEC, Brussels, pp. 237-257, 1996.

Camitz, J., F. Sigmundsson, G. Foulger, C.-H. Jahn, C. Voelksen, and P. Einarsson, Plate boundary deformation and continuing deflation of the Askja volcano, North Iceland, determined with GPS, 1987-1993, Bull. Volc., 57, 136-145, 1995.

Sigmundsson, F., E. Tryggvason, M. M. Alves, J. L. Alves, K. Palsson, and H. Olafsson, Slow inflation of the Furnas volcano, Sao Miguel, Azores, suggested from initial leveling and Global Positioning System measurements, Geophys. Res. Lett., 22, 1681-1684, 1995.

Sigmundsson, F., P. Einarsson, R. Bilham, and E. Sturkell, Rift-transform kinematics in south Iceland: Deformation from Global Positioning System measurements, 1986-1992, J. Geophys. Res., 100, 6235-6248, 1995.

Sigmundsson, F., M. M. Alves, K. Palsson, J. L. Alvez, and E. Tryggvason, 1993 GPS measurements at the Furnas volcano: Comparison of L1 and L3 GPS data for volcano monitoring, in: The European Laboratory Volcanoes, Proceedings of the International workshop held in Catania Sicily, 18-21 June 1994, edited by F. Barberi, European Commission, ECSC-EC-EAEC, Brussels, pp. 1995.

Sigmundsson, F., GPS monitoring of volcanic deformation in Iceland, In Cahiers du Centre Europeen de Geodynamique et de Seismologie, vol 8 (Proceedings of the workshop “New challenges for geodesy in volcanoes monitoring”, held in Walferdange, Luxembourg, 14-16 June, 1993), edited by P. Melchior, European Center for Geodynamics and Seismology, p. 79-98, 1994.

Sturkell, E., F. Sigmundsson, P. Einarsson, and R. Bilham, Strain accumulation 1986-1992 across the Reykjanes Peninsula plate boundary, Iceland, determined from GPS measurements, Geophys. Res. Lett., 21, 125-128, 1994.

Sigmundsson, F., Tectonic implications of the 1989 Afar earthquake sequence, Geophys. Res. Lett., 19, 877-880, 1992.

Sigmundsson, F., and P. Einarsson, Glacio-isostatic crustal movements caused by historical volume change of the Vatnajokull ice cap, Iceland, Geophys. Res. Lett., 19, 2123-2126, 1992.

Sigmundsson, F., P. Einarsson and R. Bilham, Magma chamber deflation recorded by the Global Positioning System: The Hekla 1991 eruption, Geophys. Res. Lett., 19, 1483-1486, 1992.

Sigmundsson, F., Post-glacial rebound and asthenosphere viscosity in Iceland, Geophys. Res. Lett., 18, 1131-1134, 1991.
 



 - Ađrar greinar frćđilegs eđlis / Other papers


Sigmundsson, F. and Magnusson, M. T., Eruption of Grimsvotn volcano, November 1-6, 2004, Jokull, 54, 135-138, 2005.

Dubois, L., Feigl, K., Pedersen, R. And Sigmundsson, F., Regards sur l’Islande, ses déformations vues par interférométrie radar satellitaire, Découverte, Revue du Palais de la découvert, 322, November 2004, 30-39, 2004.

Sigmundsson, F., Pladespredning pĺ Island - geodćtiske mĺlinger i 1900-tallet, Geologisk Nyt, 1, 3-5, 2000.

Sigmundsson, F., Umbrotin í Mýrdals- og Eyjafjallajökli - fyrirbođar um eldgos?, Fréttir, Slysavarnarfélagiđ Landsbjörg, 1, 17, 2000.


 - Skýrslur / Reports


Freysteinn Sigmundsson, Páll Einarsson, Páll Halldórsson, Steinunn Jakobsdóttir, Kristín Vogfjörđ, Ragnar Sigbjörnsson, Jónas Ţór Snćbjörnsson, Earthquakes and faults in the Kárahnjúkar area - Review of hazards and recommended further studies, Landsvirkjun report LV-2005/027.

Sćmundsson, K., F. Sigmundsson, J. Skúlason, Álitsgerđ um byggingarsvćđi í Bjarnarflagi, Orkustofnun Report OS-2003/013, 2003.

Hreinsdottir, S. P. Einarsson, S. Jónsson, and F. Sigmundsson, GPS geodetic measurements around Bárđarbunga volcano, Central Iceland, in 1997, Rep. RH-13-98 Science Institute, University of Iceland, and Rep. 9802 Nord. Volcanol. Inst., 1998.

Jonsson, S., P. Einarsson, F. Sigmundsson, K. Palsson, and H. Olafsson, GPS experiments in the eastern volcanic zone, south Iceland, in 1994, Rep. RH-11-95 Science Institute, University of Iceland, and Rep. 9504 Nord. Volcanol. Inst., 1995.

Einarsson P., F. Sigmundsson, and I. Magnusson, A kinematic GPS-survey in Surtsey 1992, Rep. RH-23-94 Science Institute, University of Iceland, and Rep. 9403 Nord. Volcanol. Inst., 1994.

Sigmundsson, F., P. Einarsson, R. Bilham, and E. Sturkell, South-Iceland 1992 GPS-measurements: Summary and daily observation logs, Rep. 9201 Nord. Volcanol. Inst., 1992.


 - Prófritgerđir / Theses


Sigmundsson, F., Crustal Deformation Studies in Sub-aerial Parts of the World Oceanic Rift System: Iceland and Afar, Ph. D. thesis, University of Colorado, Boulder, 112 pp., 1992.

Sigmundsson, F., Viscosity of the Earth beneath Iceland, comparison of model calculations with geological data (in Icelandic with English abstract), M.S. thesis, University of Iceland, 121 pp., University Press, University of Iceland, Reykjavik, 1990.