Ali Hasan Doğan

Yıldız Technical University

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Bahattin Erdoğan

Yıldız Technical University

TÖ

Taylan Öcalan

Yıldız Technical University

Ceyhun Erman

Istanbul Technical University

BÖ

Berkan Özkan

Istanbul Technical University

Tuncay Taymaz

Istanbul Technical University

Tahir Serkan Irmak

Kocaeli Üniversitesi

Cemali Altuntaş

Yıldız Technical University

Nursu Tunalıoğlu

Yıldız Technical University

Tuna Eken

Istanbul Technical University

Metin Kahraman

Istanbul Technical University

Cooperative Institutions

United States Geological Survey

Geologic Hazards Science Center

Denver Federal Center

Istanbul Technical University

Yıldız Technical University

Helmholtz Centre Potsdam - GFZ German Research Centre for Geosciences

United States Department of the Interior

University of Potsdam

Technische Universität Berlin

University of California, Berkeley

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Improving the wet mapping function by numerical weather models

Advances in Space Research (2023)

Ali Hasan Doğan Florian Zus Galina Dick Jens Wickert Harald Schuh

Zenith

10.1016/j.asr.2023.07.060

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Citations (1)

Precise Point Positioning with GNSS Raw Measurements from an Android Smartphone in Marine Environment Monitoring

Marine Geodesy (2022)

Nursu Tunalıoğlu Taylan Öcalan Ali Hasan Doğan

Precise Point Positioning

Android application

10.1080/01490419.2022.2027831

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Citations (7)

Determination of Snow Depth Using Reflected GPS Signals

EGU General Assembly Conference Abstracts (2018)

Nursu Tunalıoğlu Ali Hasan Doğan Utkan Mustafa Durdağ Bahattin Erdoğan Taylan Öcalan

Source

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Sub- and super-shear ruptures during the 2023 Mw 7.8 and Mw 7.6 earthquake doublet in SE Türkiye

Seismica (2023)

Diego Melgar Tuncay Taymaz Athanassios Ganas Brendan W. Crowell Taylan Öcalan

An earthquake doublet (Mw 7.8 and Mw 7.6) occurred on the East Anatolian Fault Zone (EAFZ) on February 6th, 2023. The events produced significant ground motions and caused major impacts to life and infrastructure throughout SE Türkiye and NW Syria. Here we show the results of earthquake relocations of the first 11 days of aftershocks and rupture models for both events inferred from the kinematic inversion of HR-GNSS and strong motion data considering a multi-fault, 3D geometry. We find that the first event nucleated on a previously unmapped fault before transitioning to the East Anatolian Fault (EAF) rupturing for ~350 km and that the second event ruptured the Sürgü fault for ~160 km. Maximum rupture speeds were estimated to be 3.2 km/s for the Mw 7.8 event. For the Mw 7.6 earthquake, we find super-shear rupture at 4.8 km/s westward but sub-shear eastward rupture at 2.8 km/s. Peak slip for both events were as large as ~8m and ~6m, respectively.

North Anatolian Fault

Source model

10.26443/seismica.v2i3.387

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Rapid Characterization of the February 2023 Kahramanmaraş, Türkiye, Earthquake Sequence

The Seismic Record (2023)

D. Goldberg Tuncay Taymaz Nadine G. Reitman Alexandra E. Hatem Seda Yolsal‐Çevikbilen

Abstract The 6 February 2023 Mw 7.8 Pazarcık and subsequent Mw 7.5 Elbistan earthquakes generated strong ground shaking that resulted in catastrophic human and economic loss across south-central Türkiye and northwest Syria. The rapid characterization of the earthquakes, including their location, size, fault geometries, and slip kinematics, is critical to estimate the impact of significant seismic events. The U.S. Geological Survey National Earthquake Information Center (NEIC) provides real-time monitoring of earthquakes globally, including rapid source characterization and impact estimates. Here, we describe the seismic characterization products generated and made available by the NEIC over the two weeks following the start of the earthquake sequence in southeast Türkiye, their evolution, and how they inform our understanding of regional seismotectonics and hazards. The kinematics of rupture for the two earthquakes was complex, involving multiple fault segments. Therefore, incorporating observations from rupture mapping was critical for characterizing these events. Dense local datasets facilitated robust source characterization and impact assessment once these observations were obtained and converted to NEIC product input formats. We discuss how we may improve the timeliness of NEIC products for rapid assessment of future seismic hazards, particularly in the case of complex ruptures.

Sequence (biology)

10.1785/0320230009

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Citations (76)

Effects of different mapping functions on GPS network solutions

Acta Geodaetica et Geophysica (2022)

Gizem Sezer Ali Hasan Doğan Bahattin Erdoğan

Zenith

SIGNAL (programming language)

10.1007/s40328-022-00393-5

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Evaluation of the GPS Precise Point Positioning technique during the 21 July 2017 Kos-Bodrum (East Aegean Sea) Mw 6.6 earthquake

Arabian Journal of Geosciences (2018)

Ali Hasan Doğan Nursu Tunalıoğlu Bahattin Erdoğan Taylan Öcalan

Precise Point Positioning

Epicenter

10.1007/s12517-018-4140-z

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Citations (5)

A new empirical troposphere model using ERA5's monthly averaged hourly dataset

Journal of Atmospheric and Solar-Terrestrial Physics (2022)

Ali Hasan Doğan Bahattin Erdoğan

Zenith

Very-long-baseline interferometry

Precise Point Positioning

10.1016/j.jastp.2022.105865

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Citations (15)

Scaling of the variance covariance matrix obtained from Bernese software

Acta Geodaetica et Geophysica (2019)

Bahattin Erdoğan Ali Hasan Doğan

10.1007/s40328-019-00252-w

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Citations (5)

Source Geometry and Rupture Characteristics of the 20 February 2023 Mw 6.4 Hatay (Türkiye) Earthquake at Southwest Edge of the East Anatolian Fault

Geochemistry Geophysics Geosystems (2024)

Seda Yolsal‐Çevikbilen Tuncay Taymaz Tahir Serkan Irmak Ceyhun Erman Metin Kahraman

Abstract Following the catastrophic 6 February 2023 Mw 7.8 and Mw 7.6 Kahramanmaraş earthquakes in the East Anatolian Fault Zone (EAFZ; southeast Türkiye), numerous aftershocks occurred along the major branches of this left‐lateral shear zone. The spatio‐temporal distribution of the earthquakes implied the stress‐triggering effects of co‐seismic ruptures on closely connected fault segments over large distances. On the 20 February 2023 two earthquakes with Mw 6.4 and Mw 5.2 struck Hatay (Türkiye) located near the Samandağ‐Antakya segment of the EAFZ. To understand the rupture evolution of these earthquakes, we first re‐located the aftershock sequence that occurred over a 3‐month period in the Hatay‐Syria region. A normal faulting mechanism with a significant amount of left‐lateral strike‐slip component at a shallow focal depth of 12 km was estimated for the 2023 Mw 6.4 earthquake from the inversion of seismological data. Our slip models describe a relatively simple and unilateral rupture propagation along about 36 km‐long active segments of the EAFZ. The co‐seismic horizontal displacements inferred from the Global Navigation Satellite System data are compatible with the oblique slip kinematics. Furthermore, we suggest that this earthquake did not produce notable tsunami waves on the adjacent coasts since the rupture plane did not extend to the seafloor of the Eastern Mediterranean with substantial amount of vertical displacement. We reckon that a future large earthquake (Mw ≥ 7.0) in the Hatay‐Syria region where increased stress was transferred to the fault segments of the EAFZ and the Dead Sea Fault Zone (DSFZ) after the 2023 earthquakes will be a probable source of tsunami at the coastal plains of the Eastern Mediterranean Sea region.

North Anatolian Fault

10.1029/2023gc011353

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Citations (1)