Glacial rebound and plate spreading: Results from the first countrywide GPS observations in Iceland

Geophysical Journal International

Volumn 177, Issue 2, 2009, Pages 691-716

  Arnadottir T ^a   Lund, B ^b   Jiang, W ^a,f   Geirsson, H ^c   Bjornsson H ^d   Einarsson, P ^d   Sigurdsson, T ^e  

^a UNIVERSITY OF ICELAND   (Iceland)

^b UPPSALA UNIVERSITY   (Sweden)

^c ICELANDIC METEOROLOGICAL OFFICE   (Iceland)

^d UNIVERSITY OF ICELAND   (Iceland)

^e National Land Survey of Iceland   (Iceland)

^f WUHAN UNIVERSITY   (China)

Author keywords

Glaciology; Kinematics of crustal and mantle deformation; Plate motions; Rheology: crust and lithosphere; Satellite geodesy

Indexed keywords

CRUSTAL DEFORMATION; GEODESY; GLACIAL REBOUND; GPS; KINEMATICS; PLATE BOUNDARY; PLATE MOTION; RHEOLOGY;

EURASIA; EUROPE; ICELAND; NORTHERN EUROPE; SCANDINAVIA;

EID: 64849093842     PISSN: 0956540X     EISSN: 1365246X     Source Type: Journal    
DOI: 10.1111/j.1365-246X.2008.04059.x     Document Type: Article

References (107)

1. ABAQUS, 2004. ABAQUS manuals, version 6.5, ABAQUS Inc., available at http://www.abaqus.com [2007 September 20].
2. Adalgeirsdóttir, G., Björnsson, H., Pálsson, F. & Magnússon, E., 2005. Analyses of a surging outlet glacier of Vatnajökull ice cap, Iceland, Ann. Glaciol., 42, 23-28, doi: 10.3189/17275640578181293.
3. Ágústsson, K., Stefánsson, R., Linde, A.T., Einarsson, P., Sacks, S.I., Gudmundsson, G.B. & Thorbjarnardóttir, B., 2000. Successful prediction and warning of the 2000 eruption of Hekla based on seismicity and strain changes, EOS Trans. AGU, 81(53), Fall Meet. Suppl., Abstract V11B-30.
4. Allen, R. et al., 2002a. Plume-driven plumbing and crustal formation in Iceland, J. geophys. Res., 107, B8, doi: 10.1029/2001JB000584.
5. Allen, R.M. et al., 2002b. Imaging the mantle beneath Iceland using integrated seismological techniques, J. geophys. Res., 107, 2325, doi: 10.1029/2001JB000595.
6. Altamimi, Z., Collilieux, X., Legrand, J., Garayt, B. & Boucher, C., 2007. ITRF2005: A new release of the International Terrestrial Reference Frame based on time series of station positions and Earth Orientation Parameters, J. geophys. Res., 112, B09401, doi: 10.1029/2007JB004949.
7. Amelung, F. & Wolf, D., 1994. Viscoelastic perturbations of the Earth: Significance of the incremental gravitational force in models of glacial isostacy, Geophys. J. Int., 117, 864-879.
8. Antonioli, A., Belardinelli, M., Bizzarri, A. & Vogfjörd, K.S., 2006. Evidence of instantaneous dynamic triggering during the seismic sequence of year 2000 in south Iceland, J. geophys. Res., 111, B03302, doi: 10.1029/2005JB003935.
9. Árnadóttir, T., Geirsson, H. & Einarsson, P., 2004. Coseismic stress changes and crustal deformation on the Reykjanes Peninsula due to triggered earthquakes on 17 June 2000, J. geophys. Res., 109, B09307, doi: 10.1029/2004JB003130.
10. Árnadóttir, T., Jónsson, S., Pollitz, F.F., Jiang, W. & Feigl, K.L., 2005. Postseismic deformation following the June 2000 earthquake sequence in the south Iceland seismic zone, J. geophys. Res., 110, B12308, doi: 10.1029/2005JB003701.
11. Árnadóttir, T., Jiang, W., Feigl, K.L., Geirsson, H. & Sturkell, E., 2006. Kinematic models of plate boundary deformation in southwest Iceland derived from GPS observations, J. geophys. Res., 111, B07402, doi: 10.1029/2005JB003907.
12. Bängtsson, E. & Lund, B., 2008. A comparison between two solution techniques to solve the equations of glacially induced deformation of an elastic Earth, Int. J. Numer. Methods Eng., 75, 479-502.
13. Beavan, J. & Haines, J., 2001. Contemporary horizontal velocity and strain rate fields of the Pacific-Australian plate boundary zone through New Zealand, J. geophys. Res., 106, 741-770.
14. Bergthórsson, P., 1969. An estimate of drift ice and temperature in Iceland in 1000 years, Jökull, 19, 94-101.
15. Beutler, G., Mueller, I. & Neilan, R., 1994. The International GPS service for geodynamics: Development and start of official service on January 1, 1994, Bull. Geod., 68, 39-70.
16. Björnsson, A., 1985. Dynamics of crustal rifting in Iceland, J. geophys. Res., 90, 10151-10162.
17. Björnsson, H., 1979. Glaciers in Iceland, Jökull, 29, 74-80.
18. Björnsson, H. & Pálsson, F., 2008. Icelandic glaciers, Jökull, 58, 365-386.
19. Björnsson, H., Pálsson, F., Gumundsson, M.T. & Haraldsson, H.H., 1998. Mass balance of western and northern Vatnajökull, Iceland, 1991-1995, Jökull, 45, 35-58.
20. Björnsson, H., Pálsson, F. & Haraldsson, H.H., 2002. Mass balance of Vatnajökull (1991-2001) and Langjökull (1996-2001), Iceland, Jökull, 51, 75-78.
21. Björnsson, H., Pálsson, F., Sigurdsson, O. & Flowers, G.E., 2003. Surges of glaciers in Iceland, Ann. Glaciol., 36, 82-90.
22. Bock, Y. et al., 1997. Southern California Permanent GPS Geodetic Array: continuous measurements of regional crustal deformation between the 1992 Landers and 1994 Northridge earthquakes, J. geophys. Res., 102, 8013-18033.
23. Bradwell, T., Dugmore, A.J. & Sugden, D.E., 2006. The Little Ice Age glacier maximum in Iceland and the North Atlantic Oscillation: Evidence from Lambatungnajökull, southeast Iceland, Boreas, 35, 61-80.
24. Cervelli, P., Murray, M.H. & Segall, P., 2001. Estimating source parameters from deformation data, with an application to the March 1997 earthquake swarm off the Izu Peninsula, Japan, J. geophys. Res., 106, 11217-11237.
25. Church, J. & White, N., 2006. A 20th century acceleration in global sea-level rise, Geophys. Res. Lett., 33, L01602, doi: 10.1029/ 2005GL024826.
26. Clifton, A.E. & Einarsson, P., 2005. Styles of surface rupture analysis accompanying the June 17 and 21, 2000 earthquakes in the South Iceland Seismic Zone, Tectonophysics, 396, 141-159.
27. Darbyshire, F.A., White, R.S. & Priestley, K.F., 2000. Structure of the crust and uppermost mantle of Iceland from a combined seismic and gravity study, Earth planet. Sci. Lett., 181, 409-428.
28. de Zeeuw-van Dalfsen, E., Pedersen, R., Sigmundsson, F. & Pagli, C., 2004. Satellite radar interferometry 1993-1999 suggests deep accumulation of magma near the crust-mantle boundary at the Krafla volcanic system, Iceland, Geophys. Res. Lett., 31, L13611, doi: 10.1029/ 2004GL020059.
29. DeMets, C.G., Gordon, R., Argus, D.F. & Stein, S., 1990. Current plate motions, Geophys. J. Int., 101, 425-478.
30. DeMets, C.G., Gordon, R., Argus, D.F. & Stein, S., 1994. Effect of recent revisions to the geomagnetic reversal time scale on estimates of current plate motions, Geophys. Res. Lett., 21, 2191-2194.
31. Einarsson, P., 1991. Earthquakes and present-day tectonism in Iceland, Tectonophysics, 189, 261-279.
32. Einarsson, P. & Sæmundsson, K., 1987. Earthquake epicenters 1982-1985 and volcanic systems in Iceland. A map accompanying festschrift for Th. Sigurgeirsson, in Íhlutarins edli, ed. Sigfusson, T., Menningarsjódur, Reykjavík, Iceland.
33. Einarsson, P., Björnsson, S., Foulger, G., Stefánsson, R. & Skaftadóttir, T., 1981. Seismicity pattern in the South Iceland Seismic Zone, in Earthquake Prediction - An international review, Vol. 4, pp. 141-151, eds Simpson, D.W. & Richards, P.G., AGU, Washington D.C.
34. Feigl, K.L., Gasperi, J., Sigmundsson, F. & Rigo, A., 2000. Crustal deformation near Hengill volcano, Iceland 1993-1998: Coupling between magmatic activity and faulting inferred from elastic modeling of satellite radar interferograms, J. geophys. Res., 105, 25655-25670.
35. Fleming, K., Martinec, Z. & Wolf, D., 2007. Glacial-isostatic adjustment and the viscosity structure underlying the Vatnajökull ice cap, Iceland, Pure. appl. Geophys., 164, 751-768.
36. Flowers, G.E., Marshall, S.J., Björnsson, H. & Clarke, G.K., 2005. Sensitivity of Vatnajökull ice cap hydrology and dynamics to climate warming over the next two centuries, J. geophys. Res., 110, F02011, doi:. 10.1029/2004JF000200.
37. Flowers, G.E., Björnsson, H., Geirsdóttir, A., Miller, G.H. & Clarke, G.K., 2007. Glacier fluctuation and inferred climatology of Langjökull ice cap through the Little Ice Age, Quat. Sci. Rev., 26, 2337-2353.
38. Flowers, G.E., Björnsson, H., Geirsdóttir, A., Miller, G.H., Black, J.L. & Clarke, G.K., 2008. Holocene climate conditions and glacier variation in central Iceland from physical modelling and empirical evidence, Quat. Sci. Rev., 27, 797-813.
39. Foulger, G.R., Jahn, C.H., Seeber, G., Einarsson, P., Julian, B.R. & Heki, K., 1992. Post-rifting stress relaxation at the divergent plate boundary in Northeast Iceland, Nature, 358, 488-490.
40. Geirsson, H., Árnadóttir, T., Völksen, C., Jiang, W., Sturkell, E., Villemin, T., Einarsson, P. & Sigmundsson, F., 2006. Current plate movements across the Mid-Atlantic ridge determined from 5 years of continuous GPS measurements in Iceland, J. geophys. Res., 111, B09407, doi: 10.1029/2005JB003717.
41. Geirsson, H. et al., 2007. A new high-rate continuous GPS network in Iceland for crustal deformation research, in Geophys. Res. Abs., EGU2007-A-06993, Vol. 9, European Geosciences Union.
42. Gíslason, S.R., 2008. Weathering in Iceland, Jökull, 58, 387-408.
43. Gordon, R.G., 1998. The plate tectonic approximation: Plate nonrigidity, diffuse plate boundaries, and global plate reconstruction, Annu. Rev. Earth Planet. Sci., 26, 615-642.
44. Grapenthin, R., Sigmundsson, F., Geirsson, H., Árnadóttir, T. & Pinel, V., 2006. Icelandic rhythmics: Annual modulation of land elvation and plate spreading by snow load, Geophys. Res. Lett., 33, L24305, doi: 10.1029/2006GL028081.
45. Gudmundsson, M.T., Sigmundsson, F., Björnsson, H. & Högnadóttir, T., 2004. The 1996 eruption at Gjálp, Vatnajökull ice cap, Iceland: Course of events, efficiency of heat transfer, ice deformation and subglacial water pressure, Bull. Volc., 66, 46-65.
46. Hanna, E., Jónsson, T. & Box, J.E., 2004. An analysis of Icelandic climate since the nineteenth century, Int. J. Climatol., 24, 1193-1210.
47. Hartmann, O., Jacoby, W.R., Wolf, D., Klemann, V. & Sasgen, I., 2007. Interpretation glazial-isostatischer Ausgleichsvorgänge im Südosten Islands unter Berücksichtigung des Island-Plumes, Tech. Rep. STR 07/07, GeoForschungsZentrum Potsdam, in German.
48. Heki, K., Foulger, G.R., Julian, B.R. & Jahn, C.H., 1993. Plate dynamics near divergent boundaries: Geophysical implications of postrifting crustal deformation in NE Iceland, J. geophys. Res., 98(B8), 14279-14298.
49. Herring, T.A., 2003. GLOBK: Global Kalman filter VLBI and GPS analysis program version 4.1, Tech. Rep., Mass. Inst. Technol., Cambridge, MA, USA.
50. Herring, T.A., Davis, J.L. & Shapiro, I., 1990. Geodesy by radio interferometry: The application of Kalman filtering to very long baseline interferometry data, J. geophys. Res., 95(B8), 12561-12581.
51. Hjaltadóttir, S., Vogfjörd, K.S. & Slunga, R., 2005. Mapping subsurface faults in southwest Iceland using relatively located microearthquakes, in Geophys. Res. Abs., EGU05-A-06664, Vol. 7, European Geosciences Union.
52. Hofton, M.A. & Foulger, G.R., 1996. Postrifting anelastic deformation around the spreading plate boundary, north Iceland. 1. Modeling of the 1987-1992 deformation field using a viscoelastic Earth structure, J. geophys. Res., 101(B11), 25403-25422.
53. Höskuldsson, A., Óskarsson, N., Pedersen, R., Grönvold, K., Vogfjörd, K. & Ólafsdóttir, R., 2007. The millennium eruption of Hekla in February 2000, Bull. Volc., 70, 169-182.
54. Hreinsdóttir, S., Einarsson, P. & Sigmundsson, F., 2001. Crustal deformation at the oblique spreading Reykjanes Peninsula, SW Iceland: GPS measurements from 1993 to 1998, J. geophys. Res., 106, 13803-13816.
55. Ito, G., 2001. Origin of V-shaped Reykjanes Ridges from a pulsing and dehydrating mantle plume, Nature, 411, 681-684.
56. Jacoby, W., Burger, S., Smilde, P. & Wallner, H., 2001. Temporal gravity variations observed in SE Iceland, Int. Ridge Crest Res. Arctic Ridges, 10, 52-55.
57. Jahn, C.-H., 1992. Untersuchungen über den Einsatz des Global Positioning Systems (GPS) zum Nachweis rezenter Erdkrustenbewegungen im Spaltengebiet Nordost-Islands, PhD thesis, Wissenschaftliche Arbeiten der Fachrichtung Vermessungswesen der Universität Hannover, Nr. 182, Hannover, Germany.
58. Jakobsdóttir, S.S., Roberts, M.J., Gudmundsson, G.B., Geirsson, H. & Slunga, R., 2008. Earthquake swarms at Upptyppingar, NE Iceland: A sign of magma intrusion? Stud. Geophys. Geod., 52, 513-528.
59. Jóhannesson, H., Jakobsson, S. & Sæmundsson, K., 1990. Geolocial map of Iceland, sheet 6, south Iceland, 3rd ed., Tech. Rep., Icelandic Institute of Natural History and Iceland Geodetic Survey, Reykjavík, Iceland.
60. Kaban, M., Flóvenz, O.G. & Pálmason, G., 2002. Nature of the crust-mantle transition zone and the thermal state of the upper mantle beneath Iceland from gravity modelling, Geophys. J. Int., 149, 281-299.
61. Keiding, M., Árnadóttir, T., Sturkell, E., Geirsson, H. & Lund, B., 2008. Strain accumulation along an oblique plate boundary: The Reykjanes Peninsula, southwest Iceland, Geophys. J. Int., 172 (1), 861-872, doi: 10.1111/j.1365-246X.2007.03655.x.
62. King, R.W. & Bock, Y., 2003. Documentation for the GAMIT Analysis Software release 10.1, Tech. Rep., Mass. Inst. Technol., Cambridge, MA, USA.
63. Klemann, V., Wu, P. & Wolf, D., 2003. Compressible viscoelasticity: stability of solutions for homogeneous plane earth models, Geophys. J. Int., 153, 569-585.
64. Kumar, P. et al., 2005. The lithosphere-asthenosphere boundary in the North-West Atlantic region, Earth Planet. Sci. Lett., 236, 249-257.
65. LaFemina, P.C., Dixon, T.H., Malservisi, R., Árnadóttir, T., Sturkell, E., Sigmundsson, F. & Einarsson, P., 2005. Geodetic GPS measurements in south Iceland: Strain accumulation and partitioning in a propagating ridge system, J. geophys. Res., 110, B11405, doi: 10.1029/2005JB003675.
66. Lund, B., 2005. Effects of deglaciation on the crustal stress field and implications for endglacial faulting: A parametric study of simple Earth and ice models, Tech. Rep. TR-05-04, Swedish Nuclear Fuel and Waste Managment Co. (SKB), Stockholm, Sweden.
67. Marshall, S.J., Björnsson, H., Flowers, G.E. & Clarke, G.K., 2005. Simulation of Vatnajökull ice cap dynamics, J. geophys. Res., 110, F03009, doi: 10.1029/2004JF000262.
68. McClusky, S. et al., 2000. Global Positioning System constraints on plate kinematics and dynamics in the eastern Mediterranean and Caucasus, J. geophys. Res., 105(B3), 5695-5720.
69. McKinzey, K.M., Orwin, J.F. & Bradwell, T., 2005. A revised chronology of key Vatnajökull (Iceland) outlet glaciers during the Little Ice Age, Ann. Glaciol., 42, 171-179.
70. Menke, W., West, M., Brandsdóttir, B. & Sparks, D., 1998. Compressional and shear velocity structure of the lithosphere in northern Iceland, Bull. seism. Soc. Am., 88, 1561-1571.
71. Milne, G.A., Mitrovica, J.X., Scherneck, H.-G., Davis, J.L., Johansson, J.M., Koivula, H. & Vermeer, M., 2004. Continuous GPS measurements of postglacial adjustment in Fennoscandia: 2. modeling results, J. geophys. Res., 109, B02412, doi: 10.1029/2003JB002619.
72. Moberg, A., Sonechkin, D., Holmgren, K., Datsenko, N. & Karlén, W., 2005. Highly variable Northern Hemisphere temperatures reconstructed from low- and high-resolution proxy data, Nature, 443, 613-617.
73. Olsson, S., Roberts, R. & Bödvarsson, R., 2007. Analysis of waves converted from S to P in the upper mantle beneath the Baltic Shield, Earth planet. Sci. Lett., 257, 37-46.
74. Pagli, C., Sigmundsson, F., Árnadóttir, T., Einarsson, P. & Sturkell, E., 2006. Deformation of the Askja volcanic system: constraints on the deformation source from combined inversion of satellite radar interferograms and GPS measurements, J. Volc. Geotherm. Res., 152, 97-108.
75. Pagli, C., Sigmundsson, F., Lund, B., Sturkell, E., Geirsson, H., Einarsson, P., Árnadóttir, T. & Hreinsdóttir, S., 2007a. 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, doi: 10.1029/ 2006JB004421.
76. Pagli, C., Sigmundsson, F., Pedersen, R., Einarsson, P., Árnadóttir, T. & Feigl, K.L., 2007b. Crustal deformation associated with the 1996 Gjálp subglacial eruption, Iceland: InSAR studies in affected areas adjacent to the Vatnajökull ice cap, Earth planet. Sci. Lett., 259, 24-33.
77. Pedersen, R. & Sigmundsson, F., 2004. InSAR based sill model links spatially offset areas of deformation and seismicity for the 1994 unrest episode at Eyjafjallajökull volcano, Iceland, Geophys. Res. Lett., 31, L14610, doi: 10.1029/2004GL020368.
78. Pedersen, R. & Sigmundsson, F., 2006. Temporal development of the 1999 intrusive episode in the Eyjafjallajökull volcano, Iceland, derived from InSAR images, Bull. Volc., 68, doi: 10.1007/ s00445-005-0020-y.
79. wM=6.5 earthquakes in South Iceland estimated from joint inversion of InSAR and GPS measurements, Earth planet. Sci. Lett., 213, 487-502.
80. Pinel, V., Sigmundsson, F., Sturkell, E., Geirsson, H., Einarsson, P., Gudmundsson, M.T. & Högnadóttir, T., 2007. Discriminating volcano deformation due to magma movements and variable surface loads: Application to Katla subglacial volcano, Iceland, Geophys. J. Int., 169, 325-338.
81. Pollitz, F.F. & Sacks, I.S., 1996. Viscosity structure beneath northeast Iceland, J. geophys. Res., 101, 17771-17793.
82. Rögnvaldsson, S.T., Gudmundsson, Á. & Slunga, R., 1998. Seismotectonic analysis of the Tjörnes Fracture Zone, an active transform fault in north Iceland, J. geophys. Res., 103, 30117-30129.
83. Sæmundsson, K., 1992. Geology of the Thingvallavatn area, Oikos, 64, 40-67.
84. Schmeling, H. & Marquart, G., 2008. Crustal accretion and dynamic feedback on mantle melting of a ridge centred plume: The Iceland case, Tectonophysics, 447, 31-52.
85. Sella, G.F., Dixon, T.H. & Mao, A., 2002. REVEL: A model for recent plate velocities from space geodesy, J. geophys. Res., 107, ETG 11-1-31, doi: 10.1029/2000JB000033.
86. Sigmundsson, F. & Einarsson, P., 1992. Glacio-isostaic crustal movements caused by historical volume change of the Vatnajökull ice cap, Iceland, Geophys. Res. Lett., 19, 2123-2126.
87. Sigmundsson, F., Einarsson, P., Bilham, R. & Sturkell, E., 1995. Rift-transform kinematics in south Iceland: Deformation from Global Positioning System measurements, 1986 and 1992, J. geophys. Res., 100, 6235-6248.
88. Sigmundsson, F., Einarsson, P., Rögnvaldsson, S.T., Foulger, G.R., Hodgkinsson, K.M. & Thorbergsson, G., 1997. 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(B7), 15151-15161.
89. Sjöberg, L.-E., Pan, M., Erlingsson, S., Asenjo, E. & Arnason, K., 2004. Land uplift near Vatnajökull, Iceland, as observed by GPS in 1992, 1996 and 1999, Geophys. J. Int., 159, 943-948.
90. Soosalu, H., White, R., Key, A., Knox, C., Einarsson, P. & Jakobsdóttir, S.S., 2008. Lower-crustal earthquakes reflect magma movements beneath the north Iceland rift near Askja, in Geophys. Res. Abs., EGU2008-A-07323, Vol. 10, European Geosciences Union.
91. Stefánsson, R., Gudmundsson, G. & Halldórsson, P., 2003. The South Iceland earthquakes 2000 - a challenge for earthquake prediction research, Tech. Rep. VI-R03017, Icelandic Meteorological Office, Reykjavík, Iceland.
92. Sturkell, E., Einarsson, P., Sigmundsson, F., Hreinsdóttir, S. & Geirsson, H., 2003. Deformation of Grímsvötn volcano, Iceland: 1998 eruption and subsequent inflation, Geophys. Res. Lett., 30(4), 1182, doi: 10.1029/2002GL016460.
93. Sturkell, E., Sigmundsson, F. & Slunga, R., 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.
94. Sturkell, E. et al., 2008. Seismic and geodetic insights into magma accumulation at Katla subglacial volcano, Iceland: 1999 to 2005, J. geophys. Res., 113, B03212, doi: 10.1029/2006JB004851.
95. Thoma, M. & Wolf, D., 2001. Inverting land uplift near Vatnajökull, Iceland, in terms of lithosphere thickness and viscosity stratification, in Gravity, Geoid and Geodynamics 2000, pp. 97-102, ed. Sideris, M., Springer-Verlag, Berlin.
96. Thórarinsson, S., 1943. Oscillations of the Iceland glaciers in the last 250 years, Geografiska Annaler, 25, 1-54.
97. Thordarson, T. & Larsen, G., 2007. Volcanism in Iceland in historical time: Volcano types, eruption styles and eruptive history, J. Geodyn., 43, 118-152.
98. Tryggvason, A., Rögnvaldsson, S.T. & Flóvenz, O.G., 2002. Three-dimensional imaging of the P- and S-wave velocity structure and earthquake locations beneath Southwest Iceland, Geophys. J. Int., 151, 848-866.
99. Tryggvason, E., 1994. Surface deformation at the Krafla volcano, north Iceland, 1982-1992, Bull. Volc., 56, 98-107.
100. Valsson, G.T., Sigurdsson, T., Völksen, C. & Rennen, M., 2007. ISNET2004. Results from a resurvey of the Icelandic geodetic reference network (in Icelandic with an English summary), Tech. Rep., National Land Survey of Iceland, Akranes, Iceland.
101. Vogfjörd, K.S., Hjaltadóttir, S. & Slunga, R., 2005. Volcano-tectonic interaction in the Hengill region, Iceland during 1993-1998, in Geophys. Res. Abs., EGU05-J-09947, Vol. 7, European Geosciences Union.
102. Völksen, C., 2000. Die Nutzung von GPS für die Deformationsanalyse in regionalen Netzen am Beispiel Islands, PhD thesis, Wissenschaftliche Arbeiten der Fachrichtung Vermessungswesen der Universität Hannover, Nr. 237, Hannover, Germany.
103. Wessel, P. & Smith, W., 1998. New, improved version of generic mapping tools released, EOS, Trans. Am. geophys. Un., 79, 579.
104. Whitehouse, P., Latychev, K., Milne, G.A., Mitrovica, J.X. & Kendall, R., 2006. Impact of 3-D Earth structure on Fennoscandian glacial isostatic adjustment: Implications for space-geodetic estimates of present day crustal deformations, Geophys. Res. Lett., 33, L13502, doi: 10.1029/2006GL026568.
105. Wolfe, C., Bjarnason, I.T., VanDecar, J.C. & Solomon, S.C., 1997. Seismic structure of the Iceland mantle plume, Nature, 385, 245-247.
106. Wu, P., 1992. Deformation of an incompressible viscoelastic flat earth with power-law creep: A finite element approach, Geophys. J. Int., 108, 35-51.
107. Wu, P., 2004. Using commercial finite element packages for the study of earth deformations, sea levels and the state of stress, Geophys. J. Int., 158, 401-408, doi: 10.1111/j.1365-246X.2004.02338.x.