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Ragnar Stefánsson

December 18, 2023

This is an Icelandic name. The last name is patronymic, not a family name; this person is referred to by the given name Ragnar.

Ragnar Stefánsson (born 14 August 1938) is an Icelandic seismologist[1][2][3] and a professor at the University of Akureyri.[4] For 38 years he was the head of the Geophysics Department of the Icelandic Meteorological Office.[5] As an author, he has been collected by libraries worldwide.[6]

Ragnar Stefánsson in January 2000

Biography and education edit

Ragnar was born in Reykjavík, the son of Rósa Kristjánsdóttir and Stefán Bjarnason. He completed his Fil.kand exam (B.Sc.) in mathematics and physics from Uppsala University 1961, and Fil. kand in geophysics 1962, and Fil.lic (comparable to Ph.D) in seismology 1966.

He married Astrid Malmström, a college teacher, in 1961. They had three children. With Björk Gísladóttir he has a daughter. With his second wife Ingibjörg Hjartardóttir, a writer, whom he married in 1990, he has two stepsons. The couple moved from Reykjavík to Svarfaðardalur in North Iceland in 2001, where they live at Laugasteinn in Dalvík commune. Ragnar's memoir, Það skelfur, was published in 2013.

Career edit

From 1962 to 1963 and from 1966 to 2003 he was the head of the Geophysics Department of the Icelandic Meteorological Office and in 2004 and 2005 he was the head of its Research Department at the University of Akureyri. In 2005 he was appointed research professor at that University, where he later became Professor Emeritus.

His main field of work was monitoring and research aimed to mitigate risks due to earthquakes and volcanic eruptions.[7][8] Because of his duties as the main "earthquake watcher“ of Iceland during four decades he is sometimes known in Iceland by the nickname „Ragnar Skjálfti“, i.e. Ragnar the Earthquake.

From 1980 he led the development of monitoring systems and research aiming to provide advance warnings of earthquakes and volcanic eruptions.[9][10] He led four international projects in the field of earthquake prediction research from 1988 to 2006.[5] In his 2011 book Advances in Earthquake prediction, Research and Risk Mitigation, Ragnar summarized the main conclusions of his and colleagues research during these 20 years as well as his experience in predicting and warnings ahead of earthquakes and volcanic eruptions.

Political activity edit

Ragnar was chairman of the Fylkingin (a socialist campaign league) during most of 1966–1984. After moving from Reykjavík to Svarfadardalur in north Iceland he and other locals founded in 2002 the Framfarafélags Dalvíkurbyggðar (Dalvik progressive association) where in 2015 Ragnar is still the chairman. During 2003 – 2008 he was also the chairman of the organization Landsbyggðin lifi (Icelandic rural community association), where he is still an active member. He was among the founders of the Icelandic political party VG, Vinstri hreyfingin grænt framboð (Left green party) in 1999, and is a member of its party council.[citation needed]

Publications edit

Books edit

  • Ragnar Stefánsson (2011) "Advances in Earthquake Prediction, Research and Risk Mitigation”, published in June 2011, by Springer-Verlag in Berlin and Heidelberg in association with PRAXIS Publishing in UK, 271 pages.[11]
  • Ragnar Stefánsson (2013) “Þad skelfur”, published by Skrudda ehf, Reykjavik 2013, 330 pages.

Articles in international scientific peer reviewed journals edit

  • Stefánsson, R. 1966. The use of transverse waves in focal mechanism studies. Tectonophysics 3(1), 35–60.
  • Stefánsson, R. 1966. Methods of focal mechanism studies with application to two Atlantic earthquakes. Tectonophysics 3(3), 209–243.
  • Båth, M. & R. Stefánsson 1966. S-P conversion at the base of the crust. Annali di Geofisica XIX(2), 119–130.
  • Stefánsson, R. 1979. Catastrophic earthquakes in Iceland. Tectonophysics 53, 273–278.
  • Tryggvason, K., E. Husebye & R. Stefánsson 1983. Seimic image of the hypothesized Icelandic hot spot. Tectonophysics 100, 97-118.
  • Stefánsson, R. & P. Halldórsson 1988. Strain release and strain build-up in the South Iceland seismic zone. Tectonophysics 159, 267–276.[12]
  • Stefánsson, R., R. Böðvarsson, R. Slunga, P. Einarsson, S. S. Jakobsdóttir, H. Bungum, S. Gregersen, J. Havskov, J. Hjelme & H. Korhonen 1993. Earthquake prediction research in the South Iceland seismic zone and the SIL project. Bull. Seismol. Soc. Am. 83(3), 696–716.
  • Linde, A.T., K. Ágústsson, I.S. Sacks & R. Stefánsson 1993. Mechanism of the 1991 eruption of Hekla from continuous borehole strain monitoring. Nature 365, 737–740.
  • Menke, W., B. Brandsdóttir, S.S. Jakobsdóttir & R. Stefánsson 1994. Seismic anisotrophy in the crust at the mid-Atlantic plate boundary in Southwest Iceland. Geophys. J. Int. 119, 783–790.
  • Böðvarsson, R., S. Th. Rögnvaldsson, S. S. Jakobsdóttir, R. Slunga & R. Stefánsson 1996. The SIL data acquisition and monitoring system. Seism. Res. Lett. 67(5), 35–46.
  • Crampin. S., T. Volti & R. Stefánsson 1999. A successfully stress-forecast earthquake. Geophys. J. Int. 138, F1-F5.
  • Ágústsson, K., A.T. Linde, R. Stefánsson & I.S. Sacks 1999. Strain changes for the 1987 Vatnafjöll earthquake in South Iceland and possible magmatic triggering. J. Geophys. Res. 104, 1151–1161.
  • Allen, R.M., G. Nolet, Morgan, W.J., Vogfjörð, K.S., Nettles, M., Ekström, G., Bergsson, B.H., Erlendsson, P., Foulger, G.R., Jakobsdóttir, S.S., Julian, B.R., Pritchard, M., Ragnarsson, S. & Stefánsson, R. 2002. Plume-driven plumbing and crustal formation in Iceland. J. Geophys. Res. 107(B8), ESE 4, 1-19.
  • Shen, Y., Solomon, S.C., Bjarnason, I.Þ., Nolet, G., Morgan, W.J., Allen, R.M., Vogfjörð, K.S., Jakobsdóttir, S.S., Stefánsson, R., Julian B.R. & Foulger, G.R. 2002. Seismic evidence for a tilted mantle plume and north–south mantle flow beneath Iceland. Earth Planet. Sci. Lett. 197(3-4), 261–272.
  • Geirsson, H., Árnadóttir, T., Völksen, C., Jiang, W., Sturkell, E., Villemin, T., Einarsson, P., Sigmundsson, F. & Stefánsson, R. 2006. Current plate movements across the Mid-Atlantic Ridge determined from 5 years of continuous GPS measurements in Iceland. Journal of Geophysical Research,111 (B9) B09407, doi:10.1029/2005JB003717.
  • Sturkell, E., Einarsson, P., Sigmundsson, F., Geirsson, H., Ólafsson, H., Pedersen,
  • R., De Zeeuw-van Dalfsen, E., Linde, A.T., Sacks, I.S., & Stefánsson, R., 2006:
  • Volcano geodesy and magma dynamics in Iceland, Journal of Volcanology and
  • Geothermal Research, 150, 14–34, doi:10.1016/j.jvolgeores.2005.07.010. (2006).
  • Wyss, M and Stefánsson. R (2006). Nucleation points of recent main shocks in southern Iceland mapped by b-values. Bull. Seismol. Soc. Am. 96, 599–608, doi:10.1785/0120040056.
  • Zencher, F., M. Bonafede, and Ragnar. Stefánsson (2006). Near lithostatic pore pressure at seismogenic depths: a thermo-poro-elastic model, Geophys. J. Intern.,166, 1318–1334 doi: 10.1111/j.1365-246X.2006.03069.x.
  • Bonafede, M., C. Ferrari, F. Maccaferri, and Stefánsson, R. (2007), On the preparatory processes of the M6.6 earthquake of June 17, 2000, in Iceland, Geophys. Res. Lett. (GRL), 34, L24305, doi:10.1029/2007GL031391. (2007).
  • Angelier, J., F. Bergerat, F., Stefánsson, R., Bellou, M. (2008) Seismotectonics of a newly formed transform zone near a hotspot: Earthquake mechanisms and regional stress in the South Iceland Seismic Zone.Tectonophysics, volume 447 95-116, doi:10.1016/j.tecto.2006.07.016. (2008).
  • Stefánsson, R., Gudmundsson G.B., and Halldórsson, P. Tjörnes fracture zone. New and old seismic evidences for the link between the North Iceland rift zone and the Mid-Atlantic ridge.Tectonophysics 447, 117–126. (2008).
  • Sturkell, E., Einarsson, P., Roberts, M.J., Geirsson, H., Gudmundsson, M.T., Sigmundsson, F., Pinel, V., Gudmundsson, G.B., Ólafsson, H., and Stefánsson, R. (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. (2008)
  • Stefánsson R., Bonafede, M, and Gudmundsson G.B. (2011) Earthquake prediction research and the year 2000 earthquakes in the South Iceland Seismic Zone. Bulletin of the Seismological Society of America (BSSA) ; v. 101; no. 4; p. 1590-1617; DOI: 10.1785/0120090093. (2011).

References edit

  1. ^ "Scientists: Enough Tension for 6.8 Quake in North Iceland". Iceland Review, October 24, 2012
  2. ^ Research and Technological Development Info. European Commission, DG XII, Science, Research and Development. 2003. pp. 4–5.
  3. ^ "Continued Seismic Activity in North Iceland". Iceland Review, October 29, 2012
  4. ^ . Embassy of India Reykjavik, August 2013
  5. ^ a b Annali di geofisica. Istituto nazionale di geofisica. 2001. p. 1044.
  6. ^ "Stefansson, Ragnar". worldcat.org. Retrieved September 19, 2016.
  7. ^ RIDGE Events. Vol. 1–4. U.S. RIDGE Office, University of New Hampshire. 1990.
  8. ^ The Leading Edge. Society of Exploration Geophysicists. 2003. p. 542.
  9. ^ "FORECASTING EARTHQUAKES - Seismic warnings: the Icelandic laboratory". RTDinfo, N° 43 - November 2004
  10. ^ "Stress-forecasting not predicting earthquakes: a paradigm ...". www.geos.ed.ac.uk, by S Crampin Nov 10, 1998
  11. ^ "Små skalv kan avslöja stora jordbävningar" ("Small quakes may reveal large earthquakes").Forskning Framsteg, Michaela Lundell 2012-06-20
  12. ^ Esbjörn Rosenblad; Rakel Sigurðardóttir-Rosenblad (1993). Iceland from Past to Present. Mál og menning. p. 391. ISBN 978-9979-3-0502-6.

External links edit

  • Google Scholar report

December 18, 2023
ragnar, stefánsson, this, icelandic, name, last, name, patronymic, family, name, this, person, referred, given, name, ragnar, born, august, 1938, icelandic, seismologist, professor, university, akureyri, years, head, geophysics, department, icelandic, meteorol. This is an Icelandic name The last name is patronymic not a family name this person is referred to by the given name Ragnar Ragnar Stefansson born 14 August 1938 is an Icelandic seismologist 1 2 3 and a professor at the University of Akureyri 4 For 38 years he was the head of the Geophysics Department of the Icelandic Meteorological Office 5 As an author he has been collected by libraries worldwide 6 Ragnar Stefansson in January 2000 Contents 1 Biography and education 2 Career 3 Political activity 4 Publications 4 1 Books 4 2 Articles in international scientific peer reviewed journals 5 References 6 External linksBiography and education editRagnar was born in Reykjavik the son of Rosa Kristjansdottir and Stefan Bjarnason He completed his Fil kand exam B Sc in mathematics and physics from Uppsala University 1961 and Fil kand in geophysics 1962 and Fil lic comparable to Ph D in seismology 1966 He married Astrid Malmstrom a college teacher in 1961 They had three children With Bjork Gisladottir he has a daughter With his second wife Ingibjorg Hjartardottir a writer whom he married in 1990 he has two stepsons The couple moved from Reykjavik to Svarfadardalur in North Iceland in 2001 where they live at Laugasteinn in Dalvik commune Ragnar s memoir THad skelfur was published in 2013 Career editFrom 1962 to 1963 and from 1966 to 2003 he was the head of the Geophysics Department of the Icelandic Meteorological Office and in 2004 and 2005 he was the head of its Research Department at the University of Akureyri In 2005 he was appointed research professor at that University where he later became Professor Emeritus His main field of work was monitoring and research aimed to mitigate risks due to earthquakes and volcanic eruptions 7 8 Because of his duties as the main earthquake watcher of Iceland during four decades he is sometimes known in Iceland by the nickname Ragnar Skjalfti i e Ragnar the Earthquake From 1980 he led the development of monitoring systems and research aiming to provide advance warnings of earthquakes and volcanic eruptions 9 10 He led four international projects in the field of earthquake prediction research from 1988 to 2006 5 In his 2011 book Advances in Earthquake prediction Research and Risk Mitigation Ragnar summarized the main conclusions of his and colleagues research during these 20 years as well as his experience in predicting and warnings ahead of earthquakes and volcanic eruptions Political activity editRagnar was chairman of the Fylkingin a socialist campaign league during most of 1966 1984 After moving from Reykjavik to Svarfadardalur in north Iceland he and other locals founded in 2002 the Framfarafelags Dalvikurbyggdar Dalvik progressive association where in 2015 Ragnar is still the chairman During 2003 2008 he was also the chairman of the organization Landsbyggdin lifi Icelandic rural community association where he is still an active member He was among the founders of the Icelandic political party VG Vinstri hreyfingin graent frambod Left green party in 1999 and is a member of its party council citation needed Publications editBooks edit Ragnar Stefansson 2011 Advances in Earthquake Prediction Research and Risk Mitigation published in June 2011 by Springer Verlag in Berlin and Heidelberg in association with PRAXIS Publishing in UK 271 pages 11 Ragnar Stefansson 2013 THad skelfur published by Skrudda ehf Reykjavik 2013 330 pages Articles in international scientific peer reviewed journals edit Stefansson R 1966 The use of transverse waves in focal mechanism studies Tectonophysics 3 1 35 60 Stefansson R 1966 Methods of focal mechanism studies with application to two Atlantic earthquakes Tectonophysics 3 3 209 243 Bath M amp R Stefansson 1966 S P conversion at the base of the crust Annali di Geofisica XIX 2 119 130 Stefansson R 1979 Catastrophic earthquakes in Iceland Tectonophysics 53 273 278 Tryggvason K E Husebye amp R Stefansson 1983 Seimic image of the hypothesized Icelandic hot spot Tectonophysics 100 97 118 Stefansson R amp P Halldorsson 1988 Strain release and strain build up in the South Iceland seismic zone Tectonophysics 159 267 276 12 Stefansson R R Bodvarsson R Slunga P Einarsson S S Jakobsdottir H Bungum S Gregersen J Havskov J Hjelme amp H Korhonen 1993 Earthquake prediction research in the South Iceland seismic zone and the SIL project Bull Seismol Soc Am 83 3 696 716 Linde A T K Agustsson I S Sacks amp R Stefansson 1993 Mechanism of the 1991 eruption of Hekla from continuous borehole strain monitoring Nature 365 737 740 Menke W B Brandsdottir S S Jakobsdottir amp R Stefansson 1994 Seismic anisotrophy in the crust at the mid Atlantic plate boundary in Southwest Iceland Geophys J Int 119 783 790 Bodvarsson R S Th Rognvaldsson S S Jakobsdottir R Slunga amp R Stefansson 1996 The SIL data acquisition and monitoring system Seism Res Lett 67 5 35 46 Crampin S T Volti amp R Stefansson 1999 A successfully stress forecast earthquake Geophys J Int 138 F1 F5 Agustsson K A T Linde R Stefansson amp I S Sacks 1999 Strain changes for the 1987 Vatnafjoll earthquake in South Iceland and possible magmatic triggering J Geophys Res 104 1151 1161 Allen R M G Nolet Morgan W J Vogfjord K S Nettles M Ekstrom G Bergsson B H Erlendsson P Foulger G R Jakobsdottir S S Julian B R Pritchard M Ragnarsson S amp Stefansson R 2002 Plume driven plumbing and crustal formation in Iceland J Geophys Res 107 B8 ESE 4 1 19 Shen Y Solomon S C Bjarnason I TH Nolet G Morgan W J Allen R M Vogfjord K S Jakobsdottir S S Stefansson R Julian B R amp Foulger G R 2002 Seismic evidence for a tilted mantle plume and north south mantle flow beneath Iceland Earth Planet Sci Lett 197 3 4 261 272 Geirsson H Arnadottir T Volksen C Jiang W Sturkell E Villemin T Einarsson P Sigmundsson F amp Stefansson R 2006 Current plate movements across the Mid Atlantic Ridge determined from 5 years of continuous GPS measurements in Iceland Journal of Geophysical Research 111 B9 B09407 doi 10 1029 2005JB003717 Sturkell E Einarsson P Sigmundsson F Geirsson H olafsson H Pedersen R De Zeeuw van Dalfsen E Linde A T Sacks I S amp Stefansson R 2006 Volcano geodesy and magma dynamics in Iceland Journal of Volcanology and Geothermal Research 150 14 34 doi 10 1016 j jvolgeores 2005 07 010 2006 Wyss M and Stefansson R 2006 Nucleation points of recent main shocks in southern Iceland mapped by b values Bull Seismol Soc Am 96 599 608 doi 10 1785 0120040056 Zencher F M Bonafede and Ragnar Stefansson 2006 Near lithostatic pore pressure at seismogenic depths a thermo poro elastic model Geophys J Intern 166 1318 1334 doi 10 1111 j 1365 246X 2006 03069 x Bonafede M C Ferrari F Maccaferri and Stefansson R 2007 On the preparatory processes of the M6 6 earthquake of June 17 2000 in Iceland Geophys Res Lett GRL 34 L24305 doi 10 1029 2007GL031391 2007 Angelier J F Bergerat F Stefansson R Bellou M 2008 Seismotectonics of a newly formed transform zone near a hotspot Earthquake mechanisms and regional stress in the South Iceland Seismic Zone Tectonophysics volume 447 95 116 doi 10 1016 j tecto 2006 07 016 2008 Stefansson R Gudmundsson G B and Halldorsson P Tjornes fracture zone New and old seismic evidences for the link between the North Iceland rift zone and the Mid Atlantic ridge Tectonophysics 447 117 126 2008 Sturkell E Einarsson P Roberts M J Geirsson H Gudmundsson M T Sigmundsson F Pinel V Gudmundsson G B olafsson H and Stefansson R 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 2008 Stefansson R Bonafede M and Gudmundsson G B 2011 Earthquake prediction research and the year 2000 earthquakes in the South Iceland Seismic Zone Bulletin of the Seismological Society of America BSSA v 101 no 4 p 1590 1617 DOI 10 1785 0120090093 2011 References edit Scientists Enough Tension for 6 8 Quake in North Iceland Iceland Review October 24 2012 Research and Technological Development Info European Commission DG XII Science Research and Development 2003 pp 4 5 Continued Seismic Activity in North Iceland Iceland Review October 29 2012 Iceland India News Embassy of India Reykjavik August 2013 a b Annali di geofisica Istituto nazionale di geofisica 2001 p 1044 Stefansson Ragnar worldcat org Retrieved September 19 2016 RIDGE Events Vol 1 4 U S RIDGE Office University of New Hampshire 1990 The Leading Edge Society of Exploration Geophysicists 2003 p 542 FORECASTING EARTHQUAKES Seismic warnings the Icelandic laboratory RTDinfo N 43 November 2004 Stress forecasting not predicting earthquakes a paradigm www geos ed ac uk by S Crampin Nov 10 1998 Sma skalv kan avsloja stora jordbavningar Small quakes may reveal large earthquakes Forskning Framsteg Michaela Lundell 2012 06 20 Esbjorn Rosenblad Rakel Sigurdardottir Rosenblad 1993 Iceland from Past to Present Mal og menning p 391 ISBN 978 9979 3 0502 6 External links editGoogle Scholar report Retrieved from https en wikipedia org w index php title Ragnar Stefansson amp oldid 1170203268, wikipedia, wiki, book, books, library,

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