Yazar "Sozbilir, Hasan" seçeneğine göre listele
Listeleniyor 1 - 6 / 6
Sayfa Başına Sonuç
Sıralama seçenekleri
Öğe Active surface deformations detected by precise levelling surveys in the Afyon-Aksehir Graben, Western Anatolia, Turkey(UNIV ZAGREB , ANDRIJA MOHOROVICIC GEOPHYS INST, 2019) Triyakioglu, Ibrahim; Yigit, Cemal Ozer; Ozkaymak, Caglar; Baybura, Tamer; Yilmaz, Mustafa; Ugur, Mehmet Ali; Yalcin, Mustafa; Poyraz, Fatih; Sozbilir, Hasan; Gulal, Vahap EnginIn the actively deforming region of western Anatolia, crustal deformation is accommodated by destructive earthquakes and a variety of aseismic events. In this study, we investigated the 2016-2017 aseismic sequence located in the Bolvadin Fault, one of the segments of the Aksehir-Simav Fault System of western Anatolia by analysing surface deformation derived from detailed geological mapping. Our findings suggest that surface deformation in the Bolvadin Fault is accommodated by aseismic episodes. During the field studies in the Bolvadin area, progressive surface deformations, such as surface faults and earth fissures with a length of 800 meters to 3 kilometres and strike of N15 degrees E to N70 degrees E were mapped on a 1/5000 scale. Furthermore. a levelling network was established to calculate the vertical displacements and deformation rate along the surface deformations. Precision level measurements were undertaken in 2016 and 2017. On the routes to the NW of the Bolvadin settlement, a vertical deformation rate of 30 mm/yr was detected in the period of 2016-2017, and a large deformation rate of 40 mm/yr was detected in the same period.Öğe Current Tectonic Movements Monitoring in Aksehir-Sultandagi Fault Zone After the February 2002 (Mw: 6.2) Earthquake(SPRINGER INTERNATIONAL PUBLISHING AG, 2018) Tiryakioglu, Ibrahim; Baybura, Tamer; Ozkaymak, Caglar; Yilmaz, Mustafa; Ugur, Mehmet Ali; Yigit, Cemal Ozer; Dindar, Ahmet Anil; Poyraz, Fatih; Gulal, Engin; Sozbilir, Hasan; Uysal, Murat; Akpinar, Burak; Kallel, A; Ksibi, M; BenDhia, H; Khelifi, N…Öğe Effect on the Eastern Anatolian Fault Zone Erkenek and Pazarcik Segments of the 6 February 2023 Pazarcik (Kahramanmaras) Earthquake: Observations from Celikhan-Golbasi (Adiyaman)(Afet ve Acil Durum Yonetimi Baskanligi (AFAD), 2023) Aksoy, Ercan; Akgun, Elif; Softa, Mustafa; Kocbulut, Fikret; Sozbilir, Hasan; Tatar, Orhan; Erol, Serap ColakThis study aims to evaluate on a regional scale the surface ruptures that developed on the segments forming the southern branch of the Eastern Anatolian Fault Zone (EAFZ), on 2023 February 6, based on the morphology and slip amounts determined by mapping at 1/25.000 scale. It has in sight that the left lateral displacement, which measured 2.90 m at Celikhan, reached 3.80 m towards Golbasi/Balkar along the surface rupture and increased as close to the location of the main shock. The surface rupture developing a narrow deformation zone in Celikhan forms an extensional deformation zone by stepping to the left towards Golbasi/Balkar locality. Due to this situation, small-scale pull-apart basins have developed in the area, where vertical offsets up to 60 cm are also measured. © 2023 Universite de Paris VI (Pierre et Marie Curie). All rights reserved.Öğe Effects of seismic activity on groundwater level and geothermal systems in İzmir, Western Anatolia, Turkey: the case study from October 30, 2020 Samos Earthquake(Tubitak Scientific & Technological Research Council Turkey, 2021) Uzelli, Taygun; Bilgic, Esra; Ozturk, Bahadir; Baba, Alper; Sozbilir, Hasan; Tatar, OrhanThe October 30, 2020 Samos earthquake (Mw 6.6) affected the Aegean Sea and environs, caused destruction and loss of life in the city of & Idot;zmir located 70 km away from the earthquake epicenter. Before this earthquake, water resources were monitored in the areas of Bayrakl & imath;, G & uuml;lbah sigma e, and Seferihisar. For this purpose, 10 groundwater monitoring wells were drilled in the Bayrakl & imath; area, where groundwater level, temperature, and electrical conductivity changes were monitored at 1-h intervals in 5 wells. Besides physical parameters such as groundwater levels, temperatures and electrical conductivities, hydrogeochemical cations, and anions measured in the study area. Change in the groundwater levels was observed before, during, and after the Samos earthquake. A trend of rising groundwater level was observed two days before the mainshock, to a height of 10 cm, and the level was maintained till the end of the earthquake. The water levels returned to its original height after about 7 to 10 days of the earthquake. Moreover, electrical conductivity (EC) values were changed because of the interaction with the surrounding rocks and well walls, mixing with different waters during the earthquake shaking. The essential anomalies were observed in the geothermal fields of G & uuml;lbah sigma e and Seferihisar. Due to this earthquake, new geothermal springs emerged along the NE-SW trending G & uuml;lbah sigma e and Tuzla faults, located about 50 to 20 km from the Samos earthquake epicenter, respectively. The new geothermal waters are in Na-Cl composition and similar to other geothermal springs in the region. While the recorded water temperatures in the new geothermal springs vary from 40 to 45 degrees C in Seferihisar, it was measured between 35 and 40 degrees C in G & uuml;lbah sigma e. Due to these anomalies, it is found essential to monitor the effect of the earthquake on the physical and chemical characteristics of the groundwater and its usefulness in earthquake predictions.Öğe GPS derived finite source mechanism of the 30 October 2020 Samos earthquake, Mw=6.9, in the Aegean extensional region(Tubitak Scientific & Technological Research Council Turkey, 2021) Aktug, Bahadir; Tiryakioglu, Ibrahim; Sozbilir, Hasan; Ozener, Haluk; Ozkaymak, Caglar; Yigit, Cemal Ozer; Solak, Halil IbrahimA submarine area close to the Turkish and Greek border between the cities of Samos-Greece and Seferihisar-Turkey has been shaked on October 30, 2020 by a Mw= 6.9 earthquake. In this study, the finite source mechanism of the Samos earthquake was investigated using geodetic methods and the coseismic behavior of the earthquake was modeled. The observed coseismic displacements at 62 sites were inverted for the fault geometry and the slips. The mainshock did not generate an on-land surface rupture. However, the uniform slip modeling shows a finite source of 43.1 km long and 16 km wide rupture, which slips 1.42 m along a north dipping normal fault extending from the Aegean Sea floor to a depth down to similar to 13 km. While the uniform slip model is consistent with the seismological solutions and provides a sufficient fit to the far field coseismic offsets, a distributed slip model is necessary to account for the near field coseismic displacements.Öğe Surface rupture during the 6th of February 2023 Mw 7.6 Elbistan-Ekinözü (Kahramanmaraş) earthquake: implications for fault rupture dynamics along the northern branch of East Anatolian Fault Zone(Tubitak Scientific & Technological Research Council Turkey, 2024) Softa, Mustafa; Kocbulut, Fikret; Akgun, Elif; Aksoy, Ercan; Sozbilir, Hasan; Tatar, Orhan; Karabacak, VolkanOn the 6th of February 2023, Mw 7.7 Pazarcik (Kahramanmaras) and Mw 7.6 Ekinozu (Kahramanmaras) earthquakes that occurred in Turkiye are devastating earthquake series that filled the existing seismic gaps on East Anatolian Fault Zone on the same day. The first Mw 7.7 earthquake caught most people in their sleep and 9 h later, a second one was triggered, ending up with more than 50k death toll, widespread damage to buildings, and massive landslides. This study presents the surface rupture geometry and coseismic displacement characteristics determined with field observations immediately after February 6, 2023, Ekinozu (Kahramanmaras, Turkiye) earthquake (Mw 7.6). Preliminary implications show that the total rupture length is 130 +/- 10 km on the cardak segment and Dogansehir segment, known as the northern branch of the East Anatolian Fault Zone. Left lateral strike-slip faulting is developed with a maximum horizontal displacement of 6.60 m and an average displacement of 3.00 m. Furthermore, the pitches of slip lines ranging from 0 degrees to 10 degrees were measured on the neoformed fault planes. In addition to that, surface rupture exhibits restraining bends and releasing bends structure at small scales on the cardak segment. From this point on, our preliminary results signify that cardak and Dogansehir segments were consecutively broken in Mw 7.6 Ekinozu (Kahramanmaras) earthquake that traced between Goksun and Nurhak region and from there reached the Eskikoy regions. Furthermore, potential stress may be concentrated on not only the Surgu segment which is on the transfer fault between the northern branch and the southern branch of East Anatolian Fault Zone but also the west of the cardak segment and the northeast of the Dogansehir segment near Yesilyurt (Malatya).
