Profile URL: https://hdl.handle.net/20.500.13091/11750
Job Title:Arş. Gör. Uzm.
Email Address:ikoz@ktun.edu.tr
Main Affiliation:02.08. Department of Geomatic Engineering
Status: Current Staff
ORCID:
0000-0001-8300-5330
0000-0001-8300-5330Scopus ID:
60193845
60193845YÖK Akademik: 31D5AA21A85B2F60
Google Scholar:
VRVmrJcAAAAJ
VRVmrJcAAAAJWeb of Science ID:
ABV-5531-2022
ABV-5531-2022Name Variants:
Koz, Irem
4 results
Scholarly Output Search Results
Now showing 1 - 4 of 4
Article Citation - WoS: 4Citation - Scopus: 4Investigation of Ionospheric Anomalies in Relation To Earthquakes During High and Low Solar Activity Periods in Years 2002 and 2021(Maik Nauka/Interperiodica/Springer, 2023-02-01) Köz, İrem; Doğanalp, SerkanThe interaction between lithosphere and atmosphere allows us to recognize the effects of tectonic activity on the ionosphere layer. This indicates that TEC (Total Electron Content) anomalies in the ionosphere can be a precursor to earthquakes. Within the scope of this study, ionosphere changes in pre- and post- earthquake time series of two earthquakes with magnitudes of 7.9 Mw at solar maximum times which is in solar cycle 23, 2002 and 8.2 Mw at solar minimum times which is in solar cycle 25, 2021 were investigated. TEC changes in ionosphere were calculated using GPS (Global Positioning System) data of IGS (International GNSS Service) stations located within and outside the earthquake preparation area. Anomaly values in TEC changes were computed by applying the moving median method based on the interquartile range to time series. To determine whether the anomalies were caused by space weather conditions, the indices of solar activity (F10.7), geomagnetic storm (Kp), geomagnetic field (B) and disturbance storm time (Dst) were evaluated, and correlation coefficients (?) between them and TEC anomalies were calculated. As a result of the study, it was observed that TEC values and anomalies in the earthquake which occurred during the solar maximum time were quite higher than those in the earthquake which took place during the solar minimum time. TEC anomalies which happened independently of space weather conditions prior to earthquakes were accepted as earthquake precursors.Article Citation - Scopus: 2Monitoring Ionospheric and Atmospheric Conditions During the 2023 Kahramanmaraş Earthquake Period(Mdpi, 2024) Doganalp, Serkan; Koz, IremRecent advancements have led to a growing prevalence of studies examining ionospheric and atmospheric anomalies as potential precursors to earthquakes. In this context, the study involved analyzing variations in ionospheric total electron content (TEC), investigating anomalies, assessing space weather conditions, and examining changes in atmospheric parameters to evaluate potential precursors and post-seismic effects related to the Mw 7.7 and Mw 7.6 earthquakes that struck Kahramanmara & scedil; consecutively in 2023. To compute the total electron content (TEC) values, data from 29 GNSS receivers covering a period of approximately 49 days were processed. In addition, since identical code signals were not available among all receiver stations, the study conducted an analysis of TEC estimations applying different GPS codes. To analyze space weather conditions, which are considered the main source of changes in the ionosphere, variations in sunspot number, solar activity index, magnetic activity indices (Kp and Dst), and geomagnetic field components were examined across the relevant period. To assess the potential presence of a distinct relationship between seismic activity at the Earth's surface and ionospheric conditions, atmospheric parameters including temperature, relative humidity, and pressure were meticulously monitored and evaluated. As a result of the study, it was determined that TEC anomalies that could be evaluated as earthquake precursors independent of space weather conditions were observed starting from the 3rd day before the earthquake, and high positive TEC anomalies occurred immediately after the earthquakes. In atmospheric parameters, the change in behavior, particularly in temperature value, 10 days before the earthquake, is noteworthy.Master Thesis İyonosferik Anomalilerin Gnss ile Belirlenmesi ve Deprem Öncülü Olarak İncelenmesi(Konya Teknik Üniversitesi, 2022) Köz, İrem; Doğanalp, SerkanHayatımızda kaçınılmaz olarak yer alan depremlerin maddi ve manevi hasarlarının minimum seviyeye indirilebilmesi adına depremlerin oluşum mekanizmaları, periyotları ve öncülleri sayılabilecek etkiler farklı disiplinlerce araştırılmaktadır. Sismik aktivitelerin etkilerinin, iyonosfer tabakasına kadar ulaşabildiğinin keşfinden sonra iyonosferik öncüllerin araştırılması konusuna yoğun ilgi duyulmuştur. İyonosferdeki değişimlerin incelenmesi için uydu ve yer tabanlı birçok yöntem geliştirilmiş olup bu yöntemlerden biri olan, başta konum belirleme uygulamaları amacıyla geliştirilen GNSS (Global Navigation Satellite System) teknolojileri; küresel/bölgesel anlamda çok sayıda ölçme verisi sağlayarak iyonosferdeki toplam elektron içeriği (TEC) değişimlerinin belirlenebilmesi adına önemli bir alternatif sunmaktadır. Bu çalışma kapsamında, depremlerin hazırlık alanı sınırları içinde ve yakın çevresinde bulunan IGS (International GNSS Service) istasyonlarına ait GPS (Global Positioning System) verileri kullanılarak iyonosferdeki TEC değişimleri günlük olarak hesaplanmış, hesaplanan TEC değişimleri IGS ve CODE olmak üzere iki farklı analiz merkezine ait iyonosfer dosyalarındaki (IONEX) veriler ile karşılaştırılmıştır. Depremlerin öncesi ve sonrasını kapsayan toplam 48 günlük zaman serilerine çeyrekler arası fark bazlı hareketli ortanca yöntemi uygulanarak TEC değişimlerindeki anomali değerleri hesaplanmıştır. Anomalilerin uzay iklim koşulları kaynaklı olup olmadığının araştırılması adına solar aktivite (F10.7), jeomanyetik fırtına (Kp), jeomanyetik alan (B) ve jeomanyetik aktivite (Dst) indisleri incelenmiş olup TEC anomalileri ile aralarındaki korelasyon katsayıları hesaplanmıştır. Çalışma sonucunda, depremlerin öncesinde uzay iklim koşullarından bağımsız oluşan TEC anomalileri gözlenmiş ve deprem öncülü olarak kabul edilmiştir. Bu sonuç ile birlikte çalışmanın, iyonosferik TEC araştırma çalışmalarına katkı sağlaması beklenen ve deprem tahmin modelleri için TEC anomalilerinin de dikkate alınması gerekliliğini gösteren örnek bir çalışma olması umulmaktadır.Article Detecting Wetland Fire-Induced Atmospheric and Ionospheric Disturbances Using Multi-Sensor Satellite and GPS Observations(Elsevier Ltd, 2026) Doğanalp, Serkan; İspir, Duygu Arıkan; Arıkan İspir, Duygu; Karasaka, Lütfiye; Makineci, Hasan Bilgehan; Köz, İremThis study aims to identify fires in Lake Eber and the nearby reed zones using remote sensing technology and explores how these fires may affect the ionosphere. The spatial and temporal patterns of the fires were mapped using NDWI from PlanetScope images, complemented by emission data (CO, NO2, CH4) from Sentinel-5P/TROPOMI. The VTEC values obtained from CORS-TR stations were employed to analyze the potential ionospheric effects of the fires. Anomalies were identified in the TEC series and corrected using solar and geomagnetic activity indices (F10.7, Kp: Planetary K, Dst: Disturbance storm time, Bx, By, Bz). The comparative analysis of the 2022 and 2024 fire periods showed noticeable differences in ionospheric responses. In 2022, when solar activity was relatively low (F10.7 < 150 sfu), negative TEC anomalies reaching -15 TECU were detected at the nearest stations (AFYN and YUN1). These anomalies coincided with increased CO and NO(2 )emissions. In contrast, the 2024 event occurred near solar maximum, during which substantial magnetic disturbances (Kp > 5, Dst approximate to -50 nT) obscured local ionospheric signatures. Yet, moderate correlations (r > 0.9) between CH(4 )and TECU remained. These findings indicate that during geomagnetically calm conditions, regional fire emissions can cause measurable ionospheric disturbances.
Research Topics
Domains
Physical SciencesHealth Sciences
Fields
Earth and Planetary SciencesHealth ProfessionsEngineeringPhysics and AstronomyEnvironmental Science
Subfields
GeophysicsRadiological and Ultrasound TechnologyOcean EngineeringAstronomy and AstrophysicsGlobal and Planetary Change
Specific Research Areas
Earthquake Detection and Analysis
earthquake and tectonic studies
Radioactivity and Radon Measurements
Geophysical Methods and Applications
Seismic Waves and Analysis
Ionosphere and magnetosphere dynamics
Fire effects on ecosystems
Sustainable Development Goals
11SUSTAINABLE CITIES AND COMMUNITIES
2
Research Products
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Documents
4
Citations
15
Publication Collaboration
| Affiliation Name | Count |
|---|---|
| Konya Technical University | 5 |
| General Directorate of Forestry | 1 |
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Data obtained from OpenAlex
| Journal | Count |
|---|---|
| Advances in Space Research | 1 |
| Atmosphere | 1 |
| Geomagnetism and Aeronomy | 1 |
Current Page: 1 / 1
Scholarly Output
4
Articles
3
Views / Downloads
9/14
Supervised MSc Theses
1
Supervised PhD Theses
0
WoS Citation Count
4
Scopus Citation Count
6
Patents
0
Projects
0
WoS Citations per Publication
1.00
Scopus Citations per Publication
1.50
Open Access Source
2
Supervised Theses
1
Scopus Quartile Distribution
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