The fault motion of these large earthquakes suggests that they belong to the broad North Anato-lian Fault Zone (NAFZ), where a transform plate boundary exists between the Anatolian and Eur-asian plates in northern Anatolia. (2005) for the years 1939–2012. North Anatolian Fault (NAF) is one from the most important strike-slip fault zones in the world and located among regions in the highest seismic activity. The fault extends westward from a junction with the East Anatolian Fault at the Karliova Triple Junction in eastern Turkey, across northern Turkey and into the Aegean Sea for a length of … The region is characterized by frequent earthquakes. The earthquake of August 17, 1999 occurred along the long, east-west trending, great North Anatolian Fault Zone (NAFZ) - known to be the most prominent active fault system in Northwestern Turkey. NAFZ passes through Izmit Bay, traverses Marmara Sea and reaches the Saros Gulf to the southeast. The North Anatolian Fault extends from the junction with the East Anatolian Fault at the Karliova Triple Junction to the Aegean Sea. ABSTRACT The Sea of Marmara is cut through by the North Anatolian Fault (NAF) from east to west. Red lines depict present plate boundary faults, and black lines are important faults. 1). Abstract Dedicated to the memory of three pioneers, İhsan Ketin, Sırrı Erinç and Melih Tokay, and a recent student, Aykut Barka, who burnt himself out in pursuit of the mysteries of the North Anatolian Fault . Accepted 2004 June 8. The rock types on either side of the fault are compared, offset markers are illustrated, and several types of landforms particular to strike-slip faults are shown. The Ganos Fault is an active segment representing a seismic gap at the western end of the 1200-km-long dextral North Anatolian Fault (NAF; Şengör et al. Using the detailed geometry and tectonics of the Main Marmara fault that connects the Gulf of Izmit fault with the Ganos fault established by Le Pichon et al.and the new GPS data set recently analyzed by Meade et al., we confirm the existence of a Marmara block delimited to the north by the northern branch of the North Anatolian fault (the Marmara branch) and to the south by the southern … The North Anatolian Fault . The offshore part of the North Anatolian Fault (NAF) beneath the Marmara Sea is a well-known seismic gap for future M > 7 earthquakes in the sense that more than 250 years have passed since the last major earthquake in the Central Marmara region. The earthquake source region has been designated as a seismic gap and an M7-class earthquake has been supposed to occur someday in the future so as to fill this seismic gap. ?6.7 earthquakes ruptured 1,000 km of the North Anatolian fault (Turkey) during 1939-92, providing an unsurpassed opportunity to study how one large shock sets up the next. in the fault location from about k25 km to +5 km. These). The surface ruptures of the large 1999 August Izmit and 1999 November Duzce earthquakes are indicated with blue and purple squares, respectively. 3. It is located between Karl›ova County in the NE and Karatafl (Adana)-Samanda¤ (Antakya) in the SW. that aseismic fault slip, or fault creep, occurs in the upper crust on some segments of major faults including the San Andreas Fault (SAF) north of Parkfield [e.g.,Thatcher, 1979; Burford and Harsh, 1980], the Hayward fault [e.g., Titus et al., 2006], the Superstition Hills fault [e.g.,Bilham, 1989; Wei et al., 2009], and the North Anatolian Fault The North Anatolian Fault (NAF) (Turkish: Kuzey Anadolu Fay Hattı) is an active right-lateral strike-slip fault in northern Anatolia, and is the transform boundary between the Eurasian Plate and the Anatolian Plate. The North Anatolian Fault (NAF) is a right-lateral plate boundary fault that arcs across … It separates the Anatolian block (Turkey) from the Eurasian plate, and runs from the Karliova Triple Junction to the Marmara Sea at Izmit. 1st Floor. The North Anatolian Fault (NAF), which accommodates the westward escape of the Anatolian plate, is a young transform boundary forming an active deformation zone along the northern part of Turkey. The Central Anatolian volcanics intrude through the transtensional basins formed by the Central Anatolian Fault Zone. Top panel: sites and the length of the fractures of the NFA; bottom panel: seismic gap at the Marmara sea, the red segment of the NAFZ has been not reactivated since 1766. The state of the Main Marmara Fault (fault segment of the North Anatolian Fault) is widely discussed, towards whether it is creeping or locked. Such tectonic ground displacements are characteristic of major earthquakes along the North Anatolian Fault and, possibly, have been responsible for tsunami generation in the past. The Adıyaman fault is a major splay from the East Anatolian Fault (EAF), one of the most important tectonic … The North Anatolian Fault is 745 miles (1,199 kilometers) long, about the same length as the San Andreas Fault in California, and stretches from northern Turkey to the Aegean Sea. Anatolia, also called Asia Minor, is the peninsula of land that today constitutes the Asian portion of Turkey. The North Anatolian Fault (NAF) is an active right-lateral strike-slip fault in northern Anatolia which runs along the transform boundary between the Eurasian Plate and the Anatolian Plate.The fault extends westward from a junction with the East Anatolian Fault at the Karliova Triple Junction in eastern Turkey, across northern Turkey and into the Aegean Sea for a length of 1500 kilometers. The North Anatolian Fault is subject to scrutinous examination due to its close proximity to many of the large cities and its regular seismic activity.The fault is a dextral strike-slip fault zone along Northern Turkey and has produced 6 fatal earthquakes of M>6 in the last 20 years. Calculations of the change in Coulomb failure stress reveal that 9 out of 10 ruptures were brought closer to failure by the preceding shocks, typically by 5 bars, equivalent to 20 years of secular stressing. used teleseismic data to find a coherent anisotropy signature attributed to mineral fabric within the mantle lithosphere, in which the fast polarization direction aligns with the principal extension direction (approximately NE–SW). The approximate location of the North Anatolian Fault Zone (NAFZ), the Intra Pontide Suture (IPS), the Izmir-Ankara-Erzincan Suture Zone (IAESZ) and the Ezinepazari-Sungurlu Fault (ESF) are marked in … A hypothesis for the alternative southern branch of the North Anatolian Fault Zone, Northwest Turkey 119 2a) which is an important structure indicating the location of the main strike-slip branch (see earlier). The North Anatolian Fault ( NAF) ( Turkish: Kuzey Anadolu Fay Hattı) is an active right-lateral strike-slip fault in northern Anatolia which runs along the transform boundary between the Eurasian Plate and the Anatolian Plate. The fault extends westward from a junction with the East Anatolian Fault at... The East Anatolian Fault (Turkish: Doğu Anadolu Fay Hattı) is a major strike-slip fault zone in eastern Turkey. Results further reveal a strong velocity contrast across the North Anatolian Fault likely representing a 40-60 km decrease in lithospheric thickness from the Precambrian lithosphere north of the fault to a thinned Anatolian lithosphere in the south. (1996) Extents of the North Anatolian Fault in the İzmit, Gemlik and Bandırma Bays. Turkey is seismically active. After the 1999 Golcuk Mw=7.4, the seismic stress of the North Anatolian Fault has been transferred onto the segments in the Marmara Sea. Your auto liability coverage would be used to … Location. Anatolian fault zone (NAFZ; northern Turkey) shed light on the debate over the origin and reactivation behavior of this major active fault system. Vertical black bars indicate the bracketing age constraints from paleoseismologic studies, and circles indicate potentially correlative historical earthquakes. The NAF (North Anatolian Fault) is a tectonic plate boundary between the Anatolian and Eurasian plates. During pre-location, the fault is determined precisely to the meter. Fault location is carried out methodically following a logical procedure and in four steps. Earthquake potential of the San Andreas and North Anatolian Fault Zones: A comparative look M. B. Sørensen Department of Earth Science, University of Bergen, Norway, Department of Earth Science. The fault is the result of the relative westward motion of the Anatolian Plate with Eurasia. Barka, A., Kuşçu, I. Surface uplift at the northern margin of the Central Anatolian Plateau (CAP) is integrally tied to the evolution of the Central Pontides (CP), between the North Anatolian Fault (NAF) and the Black Sea. The author recounts a field trip in October along the section of Turkey's North Anatolian Fault that last ruptured in 1944. The NAF has a long history of seismicity, and is characterized by dextral strike-slip motion Blue rectangles define the ˙Ismetpasa¸ and Destek segments from west to east, respectively (after Bohnhoff et al., 2016). Fault analysis makes it possible to determine the characteristics of the fault and the further procedure. The Izmit earthquake occurred in a 150 km (94 mile) long gap at the western end of the North Anatolian Fault. It marks the boundary between the Eurasian and Anatolian tectonic plates, which move relative to each other at a speed of around 2 cm per year. Figure 1. In a strike-slip fault, the movement of blocks along a fault is horizontal. The North Anatolian Fault Line runs across the north of the country from west to east, along which major earthquakes took place in history. The North Anatolian Fault breaks into a complicated network of fault branches under the Marmara Sea, where it passes just 20 kilometers south of Istanbul. It slowly moves at ∼20 mm yr −1 to the west by the overthrusting Arabian Plate from the south and compresses the plate motion with the help of the massive Eurasian Plate in the north. Although its geologic and geomorphologic features are well defined, crustal deformation and associated seismicity around central segment of the NAF is relatively less-known. The fault is approximately E-W, whereas the relative motion between Africa and Eurasia is northward. Dark arrows show the direction of plate motion based on GPS studies (relative to a fixed Eurasia), with the mm/yr shown in brackets [Reilinger et al., 2006]. 2005).In Northwest Anatolia, the NAF exhibits a relatively complex structure; it partitions into several active branches as it enters the Marmara Sea near İzmit. The North Anatolian Fault Zone (NAFZ) is the major continental strike-slip fault system located in northern Anatolia. The North Anatolian fault, which caused destructive earthquakes in Turkey in 1999, is comparable to the San Andreas fault in California. A number of digital off-shore seismic reflection data acquired by TPAO during 1970, 1984 and 1991 have been interpreted. The North Anatolian Fault (Fig. Annales Tectoncae Special Issue 6: 164-195. Overview on the North Anatolian Fault Zone (NAFZ) The North Anatolian Fault Zone (NAFZ) is an active right-lateral system, about 1500 km long, which bounds to the north the Anatolian block. The inset in the upper right shows a location map of the greater eastern Mediterranean region with the bold black arrows indicating the simplified relative plate motion with respect to stable Eurasia … Monitoring and control—record and analyze traveling waves from faults, switching events, breaker restrikes, and self-extinguishing faults. The major active tectonic feature of Northern Turkey is the North Anatolian Fault, a right lateral fault which has broken along almost entire length since 1939 [1-3]. Turkey is set on a minor tectonic plate … The Anatolian plate is escaping westward from between the vise of the converging Arabian and Eurasian plates. It formed rapidly ca. The NAF defines the northern boundary of the Anatolian plate and accommodates the relative right-lateral motion between the Eurasian and Anatolian plates [e.g.,Sengo¨retal.,1985;Armijoetal.,1999].The17August 1999, Izmit earthquake (M w 7.4 from long-period seismic wave data), which ruptured the western portion of the NAF ). It forms the transform type tectonic boundary between the Anatolian Plate and the northward-moving Arabian Plate. GPS vectors by Reilinger et al. Turk J Mar Sci 2: 93-106. 2013 ). Later, movement became localized along the stem, and the southerly and northerly splays became inactive. Lake Hazar lies along the East Anatolian transform fault. The North Anatolian Fault is another source of regular seismic activity in the Eurasian Plate region. North Anatolian Fault The North Anatolian Fault is one of the most energetic earthquake zones in the world. The fault motion of a strike-slip fault is caused by shearing forces. In 1999 Turkey experienced two major earthquakes which occurred 86 days apart on the North Anatolian Fault System. The epicenter of the earthquake is located near the eastern end of the Yedisu Fault, one of the important segments of the North Anatolian Fault. In this study we investigate three-dimen- and September , and aftershocks of the sional velocity and Poisson’s ratio structures of the Some of the most destructive earthquakes in history have been caused by movement along this fault. The benefit of using a recent rupture to compare serial ruptures lies in the fact that the location, magnitude, and slip vector of the most recent event are all very well documented. 3-D P-wave velocity structure and V p /V s variations in the crust along the North Anatolian Fault Zone (NAFZ) in north-central Anatolia were investigated by the inversion of local P- and S-wave traveltimes, to gain a better understanding of the seismological characteristics of the region. EAFZ East Anatolian Fault Zone, KJ Karliova Junction, NAFZ North Anatolian Fault Zone Full size image The main fault segments of the EAFZ from SW to NE are as follows: Antakya-Turkoglu, Turkoglu-Golbasi, Golbasi-Celikhan, Sincik-Hazar, Hazar-Palu and Bingol-Karliova, respectively (Italiano et al. The East Anatolian Fault extends from the Maras Triple Junction at the northern end of the Dead Sea Transform to the Karliova Triple Junction and North Anatolian Fault. 1) is a major ∼1200 km long continental strike-slip boundary, which takes up the dextral relative motion between Anatolia and Eurasia at a current rate of ∼25 mm yr −1 (Müller et al., 2013; Perouse et al., 2012; Reilinger et al., 2006, 2010). There it dives underneath the sea and re-emerges on the Estimates of cumulative slip on the northern and southern branches of the North Anatolian Fault System (NAFS) (including the Dzce Fault) show that most, if not all, accumulated elastic strain on the fault has been coseismically released at this location. 1. It separates the Eurasian plate from the Anatolian plate in northern Turkey. The southeastern boundary of the Anatolian microplate, from the eastern end of the North Anatolian fault to the Mediterranean subduction zone, is the East Anatolian fault. at one site along the 110-km rupture of the North Anatolian fault that produced the M w 7.4 earthquake of 17 August 1999. The … Barka, A.A. (1992) The North Anotalian fault zone. This fault has produced several earthquakes of magnitudes in excess of … by Megan Sever. Anatolian Fault Zone (NAFZ) and the Eskisehir North Anatolian Fault Zone (NAFZ) and the Es-Fault Zone (EFZ), respectively. Anatolia is bounded by the right-lateral and left-lateral pair of the North Anatolian Faults (NAF) and East Anatolian Fault (EAF) on the top and bottom, respectively. The left-lateral East Anatolian fault ruptured 50 km south of where it joins the North Anatolian fault (Seymen & Aydin, 1972) . The Anatolian transform fault system is probably the most active in the world. Both the 1943 and 1944 earthquakes are suspected to have had Ten M?? Earthquakes on the North Anatolian Fault between 1939 and 1999. An at-fault car accident occurs in states without PIP coverage laws. The East and North Anatolian faults together accommodate the westward motion of the Anatolian Plate as it is squeezed out by the ongoing collision with the Eurasian Plate. Well-known terrestrial examples include the San Andreas Fault, which, during the San Francisco earthquake of 1906, had a maximum movement of 6 metres (20 feet), and the Anatolian Fault, which, during the İzmit earthquake of 1999, moved more than 2.5 metres (8.1 feet). Hazardous Living: Collision forces behind devastating Turkey quake. Anatolian Fault. Fault location—traveling-wave fault location pinpoints faults to the nearest tower span. Anatolian fault zone ... Sengör et al. The August 17, 1999 Earthquake Occurred Along a Known Seismic Gap. Their locations and NE-SW trending pattern does not seem to coincide with the E-W trending subduction zone located in the Mediterranean south of Central Anatolia, and has both orogenic and anorogenic geochemical characteristics (Lustrino and Wilson 2007). CiteSeerX - Document Details (Isaac Councill, Lee Giles, Pradeep Teregowda): reflection, pull-apart. The rectangle marks the study area including the rupture of the 1999 Mw=7.4 Izmit earthquake and is enlarged in b. Figure 4. For instance, let's say you're at fault after hitting another person's parked car. The North Anatolian fault is a right lateral strike-slip fault. (2005) for the years 1939–2012. The fissure marks the … It formed in late middle Miocene time as a broad shear zone with a number of strands splaying westward in a horsetail fashion. BOUNDARIES The Anatolian/Aegean region is currently sandwiched in between the African, Arabian and Eurasian plates. The northern boundary is marked by the North Anatolian Fault (NAF) in the east and the Northern Aegean Trench (NAT) in the west. Shallow structure of the North Anatolian Fault 701 Figure 1. The fault now forms the boundary be-tween Eurasia and Anatolia, which were previ-ously welded together (Fig. Although much of the deformation associated with Arabia-Eurasia collision and Aegean extension is expressed by westward translation of Central Anatolia along the North Anatolian and East Anatolian fault zones, important deformation also takes place in the interior. The first of these earthquakes occurred on August 17, 1999 along the main western strand of the North Anatolian Fault and was Mw7.4. A shallow fault-zone E., Klinge, K., Ibs von Seht, M., Karahan, A.: Preliminary after- structure illuminated by trapped waves in the Karadere-D¨uzce shock analysis of the Mw=7.4 Izmit and Mw=7.1 D¨uzce earth- branch of the North Anatolian Fault, western Turkey, Geophys. The chain of earthquakes along the North Anatolian fault presents a gap at south of Istanbul as shown in Figure 1. Figure 3. The microplate is sandwiched between the Eurasian plate, the African plate, the Arabian plate, and the Aegean Sea plate. All of these are converging in some ways, and Turkey is acting as the barrier keeping north and south (and east and west) apart. Figure 4. The left-lateral strike-slip Adıyaman fault is located in eastern Turkey within the plate boundary deformation zone between Arabia and Anatolia. The North Anatolian fault (NAF) is a ?? Wrenching along the fault apparently started after closure of the Anatolian fault zone ... Sengör et al. The new quake did not occur on the North Anatolian Fault. This fault slips with an average speed of 20-30mm/yr and is the main focus of deformation on the northern edge of the Anatolian region as it moves west toward the Hellenic subduction zone. The southern branch builds a releasing bend towards the east, passes through Mudurnu, and connects to the main branch of the NAFZ The North Anatolian Fault (NAF) is one of the world’s largest active continental strike-slip faults, and forms the northern margin of the Anatolian plate. kisehir Fault Zone (EFZ), respectively. The North Anatolian Fault is about 1300km long running along the entire length of northern Turkey, from the Aegean Sea to the west to Lake Van to the east. [3] The EAFZ was first described by Allen [1969] and mapped by Arpat and Şaroğlu [1972], however, its exact 1Helmholtz Centre Potsdam, GFZ German Research Centre for Geosciences, Potsdam, Germany. In geographic terms Anatolia may be described as the area in southwestern Asia bounded to the north by the Black Sea, to the east and south by the Southeastern Taurus Mountains and the Mediterranean Sea, and to the west by the Aegean Sea and Sea of Marmara. Map of the Anatolian plate region. The black line represents the North Anatolian Fault zone (simplified) extending from eastern Anatolia along northern Turkey and the Sea of Marmara towards the northern Aegean. The 745-mile-long (1,200 km) North Anatolian Fault is one of the biggest strike-slip faults in the world, on the scale of California's San Andreas Fault. The at-fault driver's car insurance helps cover injury and property damage claims. Istanbul is near the North Anatolian Fault, close to the boundary between the African and Eurasian Plates. The East Anatolian Fault System (EAFS) is a 30-km-wide, 700-km-long and NE-trending sinistral strike- slip megashear belt between the Anatolian platelet in the northwest and African-Arabian plates in the southeast. The North Anatolian fault emerges as a close analogue of the San Andreas fault in California, with two continental transforms sharing similar slip rates, total length, and straight- Location of sites 1–3 along A.D. 1944 Gerede-Bolu and site 4 along 1957 Abant earthquake segments of NAFZ. In the Lake Hazar region, the EAFS consists of five fault zones. Seismic stations are marked by triangles. In order to monitor displacements occurring in this fault segment, the Sapanca micro-geodetic network was established in 1990 by Kandilli Observatory and Earthquake Research Institute of Bogazici University. East of Bolu, the fault zone exhibits evidence of a sequence of large (Mw >7) earthquakes that occurred during the twentieth century that displayed a migrating earthquake sequence from east to west. ?1500 km long, arcuate, dextral strike-slip fault zone in northern Turkey that extends from the Karliova triple junction to the Aegean Sea. In this study, we Thursday, January 5, 2012. The earthquake recurrence interval ranges from 300 to 800 years. Comparison Between San Andreas Fault and North Anatolian Fault. It represents a transform margin that mainly follows a pre-existing zone of crustal weakness: a suture zone inherited from an earlier collisional So far we have undertaken various kinds of observations in this area and we could obtain some … The black dashed line shows the location of the Intra-Pontide suture within the Armutlu Block inferred byAkbayram et al.(2016). AB and PB show the location of the Adapazari and Pamukova basin, respectively. At the location of this event, the Arabia plate moves towards the north-northwest with respect to Eurasia at a rate of about 21 mm/yr. (1997), McClusky et al. (a) A location map for our seismic experiment along the Karadere–Duzce branch of the NAF. Istanbul has one of the highest seismic vulnerabilities in the world due to its proximity to the North Anatolian Fault. Further east, on the central section of the North Anatolian Fault system, Biryol et al. tem,Biryol et al. The Yedisu Fault has not generated a strong earthquake in the last 250 years — since 1874, when a magnitude-5.8 quake struck — … Fault segments that have not experienced a recent earthquake are termed seismic gaps and are considered potential sites for future events. Anatolian plate as determined from GPS measurements and the fault kinematics surrounding the Arabian plate (Figure 1b) [Reilinger et al., 2006]. Finally, geodetic analyses yield the slip rate along the fault (Oral 1994; Straub & Kahle 1994; Straub 1996). Location of previously dated fault-gouge The Marmara Sea is in the boxed area. The inset in the upper right shows a location map of the greater eastern Mediterranean region with the bold black arrows indicating the simplified relative plate motion with respect to stable Eurasia … A shaded relief map has been overlain with the location of faults. The Anatolian/Aegean region is currently sandwiched in between the African, Arabian and Eurasian plates. lateral North Anatolian fault, a feature long con-sidered a continental transform (Ketin, 1948; McKenzie, 1972) is an excellent example to study. The North Anatolian Fault (NAF), a major continental plate boundary, accommodates the motion between Eurasia and Anatolia with right-lateral strike-slip motion. The fault extends westward from a junction with the East Anatolian Fault at the Karliova Triple Junction in eastern … Strike-Slip Basins Along 1999 Earthquake Rupture, Anatolian Fault, Turkey. The northern boundary is marked by the North Anatolian Fault (NAF) in the east and the Northern Aegean Trench (NAT) in the west. (2010) used teleseismic data to find a coher- Tectonic Map of the Marmara Region and location of the earthquake. Figure1. Other names: transcurrent fault, lateral fault, tear fault or wrench fault. On August 17, 1999, a destructive earthquake occurred in the western part of the North Anatolian Fault Zone, Turkey. 5 Ma ( Yilmaz et al., 2006 ; Zeilinger and Schlunegger, 2007 ). The difference in the relative motions of the two plates is manifest in the left lateral motion along the fault. The preceding North Anatolian earthquakes increased stress on the East Anatolian fault by 0.6 bars, with the stress maxima centered on the future 1971 rupture zone. 2. Flight SQ Rome-Singapore----- The North Anatolian Fault (NAF) (Turkish: Kuzey Anadolu Fay Hattı) is a major active right lateral-moving geologic fault in northern Anatolia which runs along the tectonic boundary between the Eurasian Plate and the Anatolian Plate. We wished to determine branch of the North Anatolian fault Zhigang Peng∗ and Yehuda Ben-Zion Department of Earth Sciences, University of Southern California, Los Angeles, CA 90089-0740, USA. We analysed the properties of the upper-mantle strain field and mantle anisotropy in the vicinity of NAFZ via splitting of SKS and SKKS phases. The NAFZ observed very large earthquakes from the past to present. The North Anatolian fault is a major 1,200 km-long transform fault bounding the Anatolian plate to the north. The post concludes with an examination of the town of Gerede itself, which is built directly atop the fault. branches of the North Anatolian Fault zone are indicated. Earthquake sequence along the North Anatolian fault, Turkey, 1939-1999. The North Anatolian Fault Zone (NAFZ) is a transform structure that constitutes the boundary between the Anatolian Plate to the south and the Eurasia Plate to the north. (2000), and The simplified fault map at top shows the location of the paleoseismic sites used in this compilation. Received 2004 May 5; in original form 2004 March 14 SUMMARY We perform a systematic analysis of crustal anisotropy along and around the Karadere–D¨uzce Shallow aseismic slip has first been identified on the Ismetpasa segment of the NAF in 1970 (cf. Examples: San Andreas Fault, California; Anatolian Fault, Turkey. November , Duzce earthquake (M . Active fault segments on the North Anatolian Fault (NAF). The North Anatolian Fault (NAF), which accommodates the westward escape of the Anatolian plate, is a young transform boundary forming an active deformation zone along the northern part of Turkey. Sapanca Fault Segment which highly seismic activities take place on and is situated on the western part of North Anatolian Fault (NAF).