1968 Aegean Sea earthquake

Earthquake affecting Greece and Turkey 1968 Aegean Sea earthquake Intensity map of the earthquake from the United States Geological Survey 6.9 km on 20 dead, 39 injuredDrakopoulos Ekonomides 1972 Over 2800, the largest of which was L 5.3-5.6Drakopoulos Ekonomides 1972Pavlides Tranos 1991 L 3.2 1 minute priorDrakopoulos Ekonomides 1972 0.17 gDrakopoulos Ekonomides 1972 IXDrakopoulos Ekonomides 1972 $0.6 million USD Turkey, Greece Strike-slip North Anatolian FaultDrakopoulos Ekonomides 1972Onat 2022 7.0 w y USGS, 7.4 s y ISCw y 7.0, w 7.2Kiratzi Svigkas 2013 s y 7.0,North 1977Taymaz Jackson McKenzie 1991 s 7.1,Papazachos Kiratzi Papadimitriou 1991 s 7.2,Taymaz Jackson McKenzie 1991 s 7.3,Jackson McKenzie 1988Ambraseys Jackson 1998 s 7.4, s 7.5Abe 1981 b y 6.0,Taymaz Jackson McKenzie 1991 b 7.1Abe 1981 fa y 7.4Drakopoulos Ekonomides 1972 M 7.1Pavlides Tranos 1991 01:45 TRT (UTC+3) y 1968 02 20 iscgem826342 826342 1968-02-19 22:45:45 39.368 N 24.957 E inline,title Central Aegean Sea en-UK The 1968 Aegean Sea earthquake was a w y 7.0 earthquake that occurred in the early morning hours of February 20, 1968 local time about 57.1 km on away from Myrina, Greece. This earthquake occurred between mainland Greece and Turkey, meaning both countries were impacted. 20 people died, and 39 people were injured to various degrees. It was the deadliest Greek earthquake since the 1956 Amorgos earthquake. Tectonic setting In the central Aegean Sea, the Aegean Sea Plate has a strike-slip boundary with the Anatolian Plate which accommodates deformation from seismic stresses.McNeill Mille Minshull Bull 2004 A large strike slip fault, the North Anatolian Fault in Turkey, developed to more easily allow faulting in the area.McNeill Mille Minshull Bull 2004 A large strand of the North Anatolian Fault branches southwest and traces near the north coast of the Gulf of Edremit.Pavlides Tranos 1991Papazachos Kiratzi Papadimitriou 1991 This segment of the fault begins northeast of the gulf, at Lake Manyas. The segment enters the Aegean Sea near the town of Babakale, Ayvacık. Earthquake The w y 7.0 earthquake struck nearest to the island of Lemnos, Greece in the middle of the night of February 20. The source parameters of the earthquake indicate right-lateral strike slip faulting along the North Anatolian fault or a similar right lateral extension at the shallow depth of 6.9 km on.Drakopoulos Ekonomides 1972Nalbant Hubert King 1998 The earthquake had faulting dimensions of 60-75 km on by 10-15 km on with an average slip of 1.8-3.2 m on.North 1977Nalbant Hubert King 1998 Surface rupturing was reported on Agios Efstratios island.Kiratzi Svigkas 2013 There were many recorded aftershocks (over 2800), with the largest being L y 5.3–5.6.Pavlides Tranos 1991 The earthquake was reportedly felt from as far away as Ankara, Turkey, and Sofia, Bulgaria.Drakopoulos Ekonomides 1972 A s 6.5 earthquake in 1967 put stress on the fault that ruptured during this event, and the rupture from this earthquake put strain on two faults: one that ruptured in a s 7.2 earthquake in 1981, and another fault that hosted a s 6.9 event in 1982.Nalbant Hubert King 1998 This earthquake also released stress on nearby faults. Both the fault that ruptured in a s 6.4 event in late December 1981 and one that ruptured in a s 6.9 event in 1983 had reduced strain after this earthquake struck.Nalbant Hubert King 1998 Tsunami Despite being a strike slip event, a type of faulting that does not typically favor tsunamigenesis, a 1.2 m on tsunami wave was recorded at the port of Myrina.Drakopoulos Ekonomides 1972 The cause may have been slumping on western St. Eustratios island.Drakopoulos Ekonomides 1972 Damage The earthquake killed 20 people, severely injured a further 18, while 21 had light injuries.Drakopoulos Ekonomides 1972 175 houses collapsed in the earthquake, while another 397 were damaged so severely they could not be repaired.Drakopoulos Ekonomides 1972 1951-2348 buildings had some structural damage such as cracks.Drakopoulos Ekonomides 1972Mavroulis Ilgac Tunçağ Lekkas 2022 Some homes on Lemnos were also damaged by the shock. The shaking was compounded with poor building quality and local conditions allowing for shaking amplification.Drakopoulos Ekonomides 1972 3600 people became homeless as a result of this earthquake, and a total of 7618 people were affected. As the island of Agios Efstratios is small and rather limited in resources, the island's authorities were unable to provide all of the relief from the disaster effects that were needed in the immediate aftermath of the earthquake.Mavroulis Ilgac Tunçağ Lekkas 2022 Monetary damage was 600 thousand 1968 dollars, and when adjusted for inflation in 2000, damage from this earthquake amount to 4.674 million dollars. See also List of earthquakes in 1968 List of earthquakes in Greece List of earthquakes in Turkey Notes References EM-DAT, the International Disaster Database https://public.emdat.be/ EMDAT 15 November 2022 GEM 826342 NGDC https://www.ngdc.noaa.gov/hazel/view/hazards/earthquake/event-more-info/4428 NGDC 24 July 2022 February 19, 1968 https://www.oasp.gr/node/2697 O.A.S.P. 24 January 2018 24 July 2022 https://earthquake.usgs.gov/earthquakes/eventpage/iscgem826342/executive M 7.0 - 57 km S of Mýrina, Greece 23 July 2022 USGS Sources Abe Katsuyuki Magnitudes of large shallow earthquakes from 1904 to 1980 Physics of the Earth and Planetary Interiors October 1981 27 1 72–92 10.1016/0031-9201(81)90088-1 1981PEPI...27...72A https://www.sciencedirect.com/science/article/abs/pii/0031920181900881 15 November 2022 subscription Ambraseys N. N. Jackson J. A. Faulting associated with historical and recent earthquakes in the Eastern Mediterranean region Geophysical Journal International 1 May 1998 133 2 390–406 10.1046/j.1365-246X.1998.00508.x free 1998GeoJI.133..390A Drakopoulos J. C. Ekonomides A. C. Aftershocks of February 19, 1968 earthquake in Northern Aegean Sea and related problems Pure and Applied Geophysics December 1972 95 1 100–115 10.1007/BF00878858 1972PApGe..95..100D 128422196 https://ui.adsabs.harvard.edu/abs/1972PApGe..95..100D 24 July 2022 Jackson James McKenzie Dan The relationship between plate motions and seismic moment tensors, and the rates of active deformation in the Mediterranean and Middle East Geophysical Journal International 1 April 1988 93 1 45–73 10.1111/j.1365-246X.1988.tb01387.x 1988GeoJI..93...45J 129204895 free Kiratzi Anastasia A. Svigkas Nikos A study of the 8 January 2013 Mw5.8 earthquake sequence (Lemnos Island, East Aegean Sea) Tectonophysics 26 November 2013 608 452–460 10.1016/j.tecto.2013.09.002 2013Tectp.608..452K https://www.sciencedirect.com/science/article/abs/pii/S0040195113005453 15 November 2022 subscription Mavroulis S. Ilgac M. Tunçağ M. Lekkas E. Püskülcü S. Kourou A. Sextos A. Mavroulis M. Can G. Thoma T. Manousaki M. Karveleas N. Emergency response, intervention, and societal recovery in Greece and Turkey after the 30th October 2020, MW = 7.0, Samos (Aegean Sea) earthquake Bulletin of Earthquake Engineering 12 January 2022 20 14 7933–7955 10.1007/s10518-022-01317-y 35210982 8753335 2022BuEE...20.7933M 245856772 free McNeill L. C. Mille A. Minshull T. A. Bull J. M. Kenyon N. H. Ivanov M. Extension of the North Anatolian Fault into the North Aegean Trough: Evidence for transtension, strain partitioning, and analogues for Sea of Marmara basin models Tectonics 23 April 2004 23 2 10.1029/2002TC001490 2004Tecto..23.2016M 129344593 free Nalbant Süleyman S. Hubert Aurélia King Geoffrey C. P. Stress coupling between earthquakes in northwest Turkey and the north Aegean Sea Journal of Geophysical Research 10 October 1998 103 B10 24469–24486 10.1029/98JB01491 1998JGR...10324469N free North Robert G. Seismic moment, source dimensions, and stresses associated with earthquakes in the Mediterranean and Middle East Geophysical Journal International 1 February 1977 48 2 137–161 10.1111/j.1365-246X.1977.tb01293.x 1977GeoJ...48..137N free Onat O. Field reconnaissance and structural assessment of the October 30, 2020, Samos, Aegean Sea earthquake: an example of severe damage due to the basin effect. Natural Hazards May 2022 112 112 75–117 10.1007/s11069-021-05173-y 35095193 8782695 2022NatHa.112...75O Papazachos B. Kiratzi A. Papadimitriou E. Regional focal mechanisms for earthquakes in the Aegean area Pure and Applied Geophysics December 1991 136 4 405–420 10.1007/BF00878578 1991PApGe.136..405P 140202748 https://link.springer.com/article/10.1007/BF00878578 15 November 2022 subscription Pavlides S. B. Tranos M. D. Structural characteristics of two strong earthquakes in the North Aegean: ierissos (1932) and Agios Efstratios (1968) Journal of Structural Geology 1991 13 2 205–213 10.1016/0191-8141(91)90067-S 1991JSG....13..205P https://dx.doi.org/10.1016/0191-8141%2891%2990067-S subscription Taymaz Tuncay Jackson James McKenzie Dan Active tectonics of the north and central Aegean Sea Geophysical Journal International 1 August 1991 106 2 433–490 10.1111/j.1365-246X.1991.tb03906.x 1991GeoJI.106..433T 130112976 free Category:Earthquakes in Greece Category:1968 earthquakes Category:1968 in Greece Category:1968 disasters in Greece