Seda Özarpacı

Seda Özarpacı
Yildiz Technical University · Department of Geomatics Enginering

PhD

About

31
Publications
8,217
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237
Citations
Introduction
My PhD thesis is about creeping faults at different regions such as 1999 Izmit earthquake rupture surface trace at North Anatolian Fault and Hazar Lake - Palu segment at East Anatolian Fault. To understand the tectonic deformation I use GPS derived velocities, gathered from campaign and continuous GPS observations. I process the data by GAMIT/GLOBK software. I model the velocity field using inverse techniques via least squares algorithm.
Additional affiliations
February 2014 - present
Yildiz Technical University
Position
  • Research Assistant
February 2012 - February 2014
Kocaeli University
Position
  • Research Assistant
Education
May 2017 - February 2018
Massachusetts Institute of Technology
Field of study
  • Earth, Atmospheric and Planetary Sciences
August 2014 - July 2020
Yildiz Technical University
Field of study
  • Geomatic Engineering
August 2005 - June 2014
Istanbul Technical University
Field of study
  • Geomatic Engineering

Publications

Publications (31)
Article
The spatiotemporal pattern of surface displacements from large earthquakes provides crucial insights about the deformation of Earth’s crust at various scales and the interactions among tectonic plates. However, the lack of extensive and large-scale geodetic networks near such seismic events hinders our thorough understanding of the large-scale crus...
Article
Full-text available
Monitoring horizontal displacements, such as landslides and tectonic movements, holds great importance and high-cost geodetic GNSS equipment stands as a crucial tool for the precise determination of these displacements. As the utilization of low-cost GNSS systems continues to rise, there is a burgeoning interest in evaluating their efficacy in meas...
Article
Full-text available
An earthquake cycle can cause meters of displacement on the surface and at Global Navigation Satellite System (GNSS) stations. This study focuses on the identification of GNSS stations that have significant displacement because of a Mw 7.0 earthquake near Samos Island on 30 October 2020. The S-transformation method is used to examine 3D, 2D and 1D...
Article
The earthquakes that occurred in Kahramanmaraş on February 6, 2023, are among the significant seismic events in Turkey. Recorded at moment magnitudes of 7.8 and 7.6 in ten hours on East Anatolian Fault Zone (EAFZ), these earthquakes resulted in extensive destruction and loss of lives in the region. The effects of these earthquakes have been activel...
Article
Full-text available
This study aimed to investigate the performance of machine learning (ML) algorithms in determining horizontal velocity at specific points using the current Global Navigation Satellite System (GNSS) velocity field. To achieve this objective, the analysis utilized the most comprehensive velocity field available for Turkey, where 70% of the GNSS veloc...
Article
Full-text available
Kıtasal deformasyonları anlayabilmek ve yorumlayabilmek için farklı yaklaşımlar ve modeller bulunmakta olup, bunlardan biri de blok modelleme yöntemidir. Blok modelleme yardımıyla plaka hareketleri, kayma hızları, faylardaki kilitlenme derinlikleri, Euler kutbu gibi parametreler belirlenebilmektedir. Ancak, blok sınırları ne kadar iyi belirlenirse,...
Article
It has long been conjectured that creeping sections of strike slip faults arrest or subdue earthquake rupture, partly because of their reduced slip potential and partly because of their velocity-strengthening frictional properties. However, no instrumentally recorded large earthquake (Mw ≥ 6.8) on any well instrumented continental strike-slip fault...
Article
Full-text available
Block modeling is an effective way to understand Earth’s crustal deformation. However, the choice of block boundaries and the number of blocks affect the model results. Therefore, the subjectivity of this analysis should be avoided. Clustering analysis can be used to define the blocks of GPS (Global Positioning System) velocity fields without a pri...
Article
Full-text available
The Anatolia–Aegean domain represents a broad plate boundary zone, with the deformation accommodated by major faults bounding quasi-low deforming units. First-order features of this deformation were obtained in the form of a GNSS-derived velocity field. During the last decade, the accuracy of velocity solutions was improved, and the expansion of co...
Article
The Global Positioning System (GPS), although it has existed for only 30 years, is an important source for active tectonics, resulting in estimates of plate motions very close to geologic estimates over millions of years (Reilinger et al. 2010). GPS is also used for elastic block models to calculate slip rates for a better understanding of Earth’s...
Conference Paper
January 24, 2020 Sivrice earthquake (Mw 6.8), which is the largest along the East Anatolian Fault (EAF) over the last century, is providing a wealth of information on the mechanics of transform faulting and for monitoring the different phases of the last seismic cycle. In this study, we aim to estimate coseismic and postseismic surface deformation...
Conference Paper
The North Anatolian Fault (NAF) is a one of the major dextral strike-slip faults of Turkey which forming the boundary between the Eurasian - Anatolian plates. From 1939 to 1999, significant earthquakes occurred as showing a westward migration. Several studies are being conducted due to this seismic activity along the NAF. However, none of these are...
Article
Full-text available
The East Anatolian Fault (EAF) is a left‐lateral transform fault accommodating the relative motion between the Anatolian and Arabian plates. On January 24, 2020, Mw6.8 Sivrice (Elazığ) earthquake is the largest event that occurred along the EAF since the nineteenth century. The earthquake provides a unique opportunity to capture a critical stage of...
Conference Paper
Full-text available
The Samos-Izmir Earthquake (Mw=6.9) of October 30, 2020 is among the strongest earthquakes that occurred in recent years throughout the Eastern Aegean. The epicenter of this earthquake was 14 km away from Samos Island and 25 km away from Gümüldür-İzmir region. The local tsunami with the wave heights reaching ~2m was triggered by the mainshock. The...
Article
In order to better assess earthquake hazards, it is vital to have a better understanding of the spatial and temporal characteristics of fault creep that occur on ruptured faults during the period following major earthquakes. Towards this end, we use new far-field GPS velocities from continuous stations (extending ∼50 − 70 km from the fault) and upd...
Article
Full-text available
Bu çalışmada, web tabanlı çevrimiçi değerlendirme servislerinin tektonik uygulamalarda kullanılabilirliği ve doğruluk performanslarının ölçülmesi amaçlanmıştır. Bu amaç kapsamında, 23 Ekim 2011 Van depreminin deprem anı yatay deformasyonlarının belirlenmesi için deprem bölgesinde bulunan TUSAGA-AKTİF ağına ait 12 GNSS istasyonunun gözlem verisi web...
Article
Full-text available
The 20 July 2017, Mw6.6 Bodrum-Kos Earthquake occurred in the Gulf of Gökova in the SE Aegean, a region characterized by N-S extension in the back-arc of the easternmost Hellenic Trench. The dip direction of the fault that ruptured during the earthquake has been a matter of controversy where both north and south-dipping fault planes were used to mo...
Article
Full-text available
Characterizing the spatiotemporal evolution of creep is essential to constrain fault slip budget and understand creep mechanism. Studies based on interferometric synthetic aperture radar and Global Positioning System (GPS) satellite observations until 2012 have shown that the central segment of the 17 August 1999 Mw 7.4 Izmit earthquake on the Nort...
Article
Global Navigation Satellite System (GNSS) processing software packages such as GAMIT/GLOBK, Bernese, GIPSY/OASIS etc., have an important role in high-precision GNSS studies. For a single GNSS session, they result in Formal Error (FE) rather than positioning accuracy because it may not be possible to incorporate the correlations in the GNSS data pro...
Article
Full-text available
We report that asperities with the highest coseismic slip in the 2014 MW6.9 North Aegean earthquake persisted through the interseismic, coseismic and immediate post-seismic periods. We use GPS and seismic data to obtain the source model of the 2014 earthquake, which is located on the western extension of the North Anatolian Fault (NAF). The earthqu...
Article
We report that asperities with the highest coseismic slip in the 2014 of MW6.9 North Aegean Earthquake persisted through the interseismic, coseismic and immediate postseismic periods. We use GPS and seismic data to obtain the source model of the 2014 earthquake, which is located on the western extension of the North Anatolian Fault (NAF). The earth...
Article
GNSS networks play an important role in monitoring the displacements, movements and deformations of the Earth’s crust and engineering buildings. In this study, we examine how GPS Precise Point Positioning (PPP) is able to determine the horizontal deformations with respect to the GPS network solution. For this purpose, 7 days data of 12 Continuously...
Article
Urban transformation projects in which different aspects are put on the agenda are implemented to restore the quality of urban life in the depressed areas of cities, loosing their functions and intensity of use in the past, in terms of economic, physical and social aspects. During the application process of the urban transformation phenomenon which...

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