Mualla yalcınkaya

• Karadeniz Technical University

Günümüzde iklim değişikliğine bağlı olarak atmosferdeki sera gazı miktarında ortaya çıkan artış, sıcaklıklar gittikçe artmakta ve artan sıcaklıklar ise deniz ve okyanus sularının genleşmesine, buzulların erimesine ve düzensiz ekstrem yağışlara sebep olmaktadır. Dünya nüfusunun büyük bir kısmının kıyı yerleşim alanlarında yaşıyor olması sebebiyle de...

In this study, the relationships between possible ionospheric total electron content (TEC) anomalies and earthquake focal depths and fault types were investigated using 3,099 global earthquakes with Mw ≥ 6.0 between 2000 and 2020.

Recently, Total Electron Content (TEC) data, obtained from Global Navigation Satellites Systems (GNSS) receivers, are increasingly being used to detect seismo-ionospheric anomalies. In this study, Global Positioning System – Total Electron Content (GPS-TEC) data were used to investigate ionospheric abnormal behaviours prior to the 2005 Northern Per...

The Global Positioning System (GPS) is used as an important tool for ionosphere monitoring and obtaining the Total Electron Content (TEC) variations. GPS satellites, positioned in the Earth's orbit, are used as sensors to investigate the space weather conditions. In this study, changes in the ionospheric TEC, which originated from space weather con...

Earthquakes are natural phenomena that shake the earth and cause many damage. Since the time of arrival of the earthquakes cannot be determined directly, some signs before the earthquake should be examined and interpreted by examining the environmental changes. One of the methods used for this is monitoring the ionospheric total electron content (T...

The Global Positioning System (GPS) is used as an important tool for ionosphere monitoring and obtaining the Total Electron Content (TEC) variations. GPS satellites, positioned in the Earth’s orbit, are used as sensors to investigate the space weather conditions. In this study, changes in the ionospheric TEC, which originated from space weather con...

Günümüzde, Global Seyrüsefer Uydu Sistemleri (GNSS) iyonosferin izlenmesinde ve Toplam Elektron İçeriğinin (TEC) belirlenmesinde önemli bir araç olarak kullanılmaktadır. GPS uyduları, Dünya’nın yörüngesinde konumlandırılmış sensörler gibi kullanılarak uzay iklim koşullarının araştırılmasında kullanılmaktadır. Bu çalışmada, uzay iklim koşullarının i...

Total electron content (TEC) data obtained from receivers of global navigation satellite systems (GNSSs) are increasingly being used to detect pre-earthquake ionospheric anomalies. In this study, the pre-earthquake ionospheric anomalies that occurred before the 2010 Baja California (32.128° N, 115.303° W, 4 April 2010, 22:40:42 UTC, Mw = 7.2) earth...

The Global Positioning System (GPS) is used as an important tool for ionosphere monitoring and obtaining the Total Electron Content (TEC). GPS satellites, positioned in the Earth’s orbit, are used as sensors to investigate the space weather conditions. In this study, solar and geomagnetic activity variations were investigated between the dates 1 Ma...

Recently, investigation of the anomalies in the ionosphere before the earthquake has taken too much attention. The Total Electron Content (TEC) data has been used to monitor the changes in the ionosphere. Hence, researchers use the TEC changes before the strong earthquakes to monitor the anomalies in the ionosphere. In this study, the GPS-TEC varia...

Global Positioning System (GPS) satellites have been used as sensors with the development in space and satellite techniques. Total Electron Content (TEC) variations in the ionosphere before, during and after the earthquake can be identified by means of GPS observations. Thus, the effects of earthquakes over TEC variations can be monitored. In this...

Research has been done on the effects of seismic activity on a layer of the ionosphere. To counteract the devastating effects of the earthquake, occurrence time of the earthquake is important for pre-estimating. Effects occurring in the earthcrust cannot be detected only as a shake. These changes will be modeled with using different methods and dev...

The importance of geodetic deformation measurements and analysis has gradually increased in the last decade. The method which is commonly used to determine deformation is called the geodetic monitoring network method. The monitoring network consists of deformation control points (object points) which are established on the moving area and control p...

In order to investigate the deformations of an area or an object, geodetic observations are repeated at different time epochs and then these observations of each period are adjusted independently. From the coordinate differences between the epochs the input parameters of a deformation model are estimated. The decision about the deformation is given...

Today, most geodetic networks established in landslide areas are being measured by differential Global Position-ing System (GPS) measurements. Accuracy of differential GPS measurements now is capable of detecting real time displacements of geodetic control points in a landslide area. Nevertheless, producing optimal baseline configuration and optima...

Regional land-use development projects are undertaken to protect water resources necessary for agriculture, energy and sustaining human life. The Değirmendere valley, in the province of Trabzon in the Black Sea region of Turkey, provides clean water to the city of Trabzon. The valley is part of the Silk Road from Asia to the Black Sea and contains...

Being the cause of the loss of life and damaging property, landslide is an important natural hazard. Therefore, landslides have to be monitored and preventive measures taken accordingly. In Geodesy, landslides can be determined with static, kinematic and dynamic geodetic models. The aim of this study is to develop a dynamic geodetic model for lands...

The aim of this study is to form a dynamic deformation model for landslides. Static and kinematic models used in practice in determining movements do not deal with the mechanical characteristics of the object and the deformation mechanism. They may yield misleading results in interpreting movements. In contrast, dynamic deformation models determine...

In a previous study, the author investigated the best suited static and kinematic models for deformation analysis. In that study, the best results were obtained with the Kalman-filtering technique for the kinematic model. In addition, the best kinematic surface model was determined. In this study, the conclusions of the previous work have been test...

zet. Günümüzde, yer merkezli üç boyutlu konum belirleme sistemi (GPS), jeodezik sıklaştırma ağla-rında, güncel yerkabuğu hareketlerinin izlenmesi, depremlerin önceden kestirimi, heyelanların izlen-mesi, mühendislik yapılarının denetimi gibi her tür-lü kontrol ağlarında gittikçe artan bir kullanım alanı bulmuştur. Jeodezik ağların kuruluş amacına uy...

ZET Yersel Konum Belirleme Sistemi (GPS) ile jeodezik kontrol noktalarına ait elipsoid yükseklikleri yüksek duyarlıkta belirlenebilmektedir. Pratik jeodezide kullanılan yükseklikler ise jeoid yüzeyinden başlayıp kontrol noktasına kadar çekül eğrisi boyunca olan ortometrik yükseklikler olarak tanımlanır. Jeoid analitik yüzeyi yerel çalışma alanların...

Determining shape and position changes occurred in engineering buildings is one of an application area of geodetic surveys. Temporary and permanent deformations occur in engineering structures such as dam, bridge, tunnel, viaduct and tower due to natural and artificial forces. Causes of these deformations are usually physical properties of ground,...