EERC TEAM An Overview Ragnar Sigbjörnsson UPStrat-MAFA Workshop, Selfoss July 2012

Prelude South Iceland Lowland has been our ‘field laboratory’ for the last 25 years Research aimed towards seismic risk reduction Close cooperation with the local people The Rector of the University of Iceland and the Mayor of Árborg signed a contract in 1997 that lead to the establishment of EERC The Centre was officially opened in 2000

The EERC Team Academic staff: Dr. Ragnar Sigbjörnsson, Professor, Director Dr. Símon Ólafsson, Research Professor Dr. Jónas Elíasson, Research Professor Dr. Benedikt Halldórsson, Assoc. Research Professor Dr. Rajesh Rupakhety, Assoc. Research Professor Sólveig Thorvaldsdóttir, MSE, Research Engineer Ásthildur Elva Bernhardsdóttir, cand oecon, MA, Rsrch Scientist Sigurdur Unnar Sigurdsson, MSc, Research Engineer Aldís Sigfúsdóttir, MSc, PE, Research Engineer Visiting Professors: Dr. Athol J. Carr, Professor Dr. John Douglas, Research Scientist Dr. Apostolos S. Papageorgiou, Professor Dr. Jónas Thór Snæbjörnsson, Professor

Office staff: Elínborg Gunnarsdóttir, Manager Katrín Kristjánsdóttir, Research Assistant Doctoral students: Ævar Harðarson, MArch Fjóla G. Sigtryggsdóttir, MSc Ole André Oiseth, MSc MSc-students: Teaching and Research Assistants: Jón Einarsson  Anna Beta Gísladóttir Puja Rupakhety  Einar Óskarsson Hrafnkell Már Stefánsson  Hörður Páll Steinarsson  Steinar Þór Backmann The EERC Team

International Cooperation

The EERC Team Participating in the Workshop Dr. Ragnar Sigbjörnsson, Professor, Director Dr. Símon Ólafsson, Research Professor Dr. Rajesh Rupakhety, Assoc. Research Professor Sólveig Thorvaldsdóttir, MSE, Research Engineer Ásthildur Elva Bernhardsdóttir, MA, Research Scientist Guests - Visiting Professors: Dr. Jónas Thór Snæbjörnsson, Professor Dr. Radan Ivanov, Professor Office staff: Elínborg Gunnarsdóttir, Manager Katrín Kristjánsdóttir, Research Assistant

Seismicity of Iceland An Introduction Ragnar Sigbjörnsson UPStrat-MAFA Workshop, Selfoss July 2012

Contents Seismo-tectonics of Iceland Earthquake catalogue data Macroseismic field data Strong-motion data Seismic hazard maps

Seismo-tectonics of Iceland References: Sigbjörnsson, R & Ólafsson, S. (2004). On the South Iceland earthquakes in June 2000: strong-motion effects and damage. Bollettino di Geofisica Teorica e Applicata, 45(3):

ICELAND MID-ATLANTIC RIDGE SISZ TFZ ~ 1 cm/yr

Active central volcanoes (yellow), calderas (red) and fissure swarms (green)

Volcanic zones and earthquakes o earthquake > 4 after 1896;  &  recorded by IceSMN;  earthquakes 2000 og 2008

Results of GPS-measurements O recording station; lines indicate velocity and direction

Active plate boundary North-American Plate Eurasian Plate

Volcanic zones and earthquakes o earthquake > 4 after 1896;  &  recorded by IceSMN;  earthquakes 2000 og 2008

Vulcanic zones, earthquakes and active plate boundary

Earthquake in South Iceland Seismic Zone the last 100 years

Surface fracture 21 June 2000

Landslide 21 June 2000

Damage to road 21 June 2000

Damage to farm building 21 June 2000

Damage to residential house 17 June 2000

Inside a residential house 17 June 2000

PTSD June 2000

The Árborg Town Hall: The strong-motion array

Ground acceleration Basement of Town Hall at Selfoss, 29 May 2009

Response acceleration 3rd floor of the Town Hall at Selfoss, 29 May 2009

Inside the EERC building University of Iceland 29 May 2008

The Árborg Town Hall: Displacement (cm) during the 29. maí 2008 earthquake

Earthquake Catalogue of Iceland References: Ambraseys, N.N. & Sigbjörnsson, R (1999). Re ‑ Appraisal of the Seismicity of Iceland, Polytechnica - Engineering Seismology, Reykjavik, ISSN Ambraseys, N.N. & Sigbjörnsson (2003). On the seismicity of northwestern Europe: A comparative study of earthquake catalogues, Department of Civil and Environmental Engineering, Imperial College of Science, Technology and Medicine, London, UK, Research report number: SM, References in the above mentioned publications

Parametric Catalogue for Iceland (Ambraseys and Sigbjörnsson, 2000) QuantityValue magnitude scale geographic area period total number of events events with recalculated magnitude range of recalculated magnitudes Surface-wave magnitude, M S 62°N to 68°N and 26°W and 12°W 1896 to – 7.2

Temporal distribution of events in the Parametric Earthquake Catalogue for Iceland

Spatial distribution of earthquake epicentres in the Parametric Earthquake Catalogue for Iceland

Time-line of the Parametric Earthquake Catalogue for Iceland showing surface-wave magnitude as a function of time

Distribution of surface-wave magnitudes from the Parametric Earthquake Catalogue for Iceland (a) histogram (b) cumulative distribution.

Macroseismic Field Data References: Ambraseys, N.N. & Sigbjörnsson, R (1999). Re ‑ Appraisal of the Seismicity of Iceland, Polytechnica - Engineering Seismology, Reykjavik, ISSN

Strong-motion Data References: Ambraseys, N.N. et al. (2002). ISESD – Internet Site for European Strong-Motion Data. European Com­mission, Research-Directorate General, Environment and Climate Programme. Ambraseys, N.N. et al. (2004). Internet Site for European Strong- Motion Data. Bollettino di Geofisica Teorica e Applicata, 45(3):

The Icelandic Strong-motion Network, IceSMN ● ground station; ▲ power plant; ▲ dam; ▼ bridge; ■ building

Strong-motion Data The records are available on the Internet ISESD – European Databank Information...

Earthquake Hazard Maps for structural design purposes References: the hazard maps were derived by Ragnar Sigbjörnsson in 2002

Significant Duration – June 2000

The seismic source zones and lineaments applied in probabilistic seismic hazard analysis

UPStrat-MAFA Workshop, Selfoss July 2012