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Paleoseismology of the 1966 Varto Earthquake (Ms 6.8) and Structure of the Varto Fault Zone, Eastern Turkey.

  • The Ministry of Environment, Urbanization and Climate Change General Directorate of Spatial Planing
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... As the NAFZ forms the northern boundary of the Anatolian microplate, it has a feature of a plate boundary fault zone within a continent (Fig. 1). Although it is generally accepted that the right lateral strike-slip zone intersects the Eastern Anatolian Fault Zone (EAFZ) and ends in Karliova in the east, the extent of the zone to the southeast of Karliova and its activity are also known (Wallance, 1968;Ambraseys and Zatopek, 1969;Isik et al., 2014;Gürboğa, 2015). Neotectonics and seismological studies display that the zone creates fault splay geometry in the western section and reaches the Aegean Sea. ...
The 1944 earthquake segment of the North Anatolian Fault Zone contains paleoseismological signatures of major earthquake events. The segment consists of three active main faults and secondary faults showing anastomosing fault pattern. Stratigraphic and structural relationships and radiocarbon ages from trench excavation reveal that the main active fault located at the northernmost part of the region has produced four major earthquakes events up to now. These events, from north to south, correspond to 1944, 1668, 967, and 300 AD earthquakes on the segment. Our findings suggest that earthquake recurrence interval on the segment range from 276 ± 30 to ~700 years. The amount of displacement caused by surface faulting and earthquake recurrence interval indicates that the slip rate along the 1944 earthquake segment is 17–21 mm/yr in the late Holocene.
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