A5101538480- Earthquake Detection and Analysis
- Seismic Waves and Analysis
- Geomagnetism and Paleomagnetism Studies
- Solar and Space Plasma Dynamics
- Geophysical and Geoelectrical Methods
- Geophysics and Gravity Measurements
- earthquake and tectonic studies
- Ionosphere and magnetosphere dynamics
- Historical Astronomy and Related Studies
- Magnetic Field Sensors Techniques
- Fatigue and fracture mechanics
- Electrical and Bioimpedance Tomography
- High-pressure geophysics and materials
- Time Series Analysis and Forecasting
- Geological and Geophysical Studies
- Planetary Science and Exploration
- Multidisciplinary Science and Engineering Research
- Rock Mechanics and Modeling
- Landslides and related hazards
- Characterization and Applications of Magnetic Nanoparticles
- Reservoir Engineering and Simulation Methods
- Geological and Geochemical Analysis
- Inertial Sensor and Navigation
- Aluminum Alloy Microstructure Properties
- High Temperature Alloys and Creep
Boğaziçi University
2002-2019
Kandilli Observatory and Earthquake Research Institute
2004-2019
TOBB University of Economics and Technology
2016
Karadeniz Technical University
2015
On August 17, 1999, a destructive earthquake occurred in the western part of North Anatolian Fault Zone, Turkey. The source region has been designated as seismic gap and an M7-class supposed to occur someday future so fill this gap. So far we have undertaken various kinds observations area could obtain some valuable data before, during after mainshock. Here report preliminary results our recent studies, which include field work started late July year continued occurrence just its vicinity,...
Geomagnetic field data with high time resolution (typically 1 s) have recently become more commonly acquired by ground stations. Such enable identifying Pi2 pulsations which periods of 40–150 s and irregular (damped) waveforms. It is well‐known that this type are clearly observed at mid‐ low‐latitude stations on the nightside substorm onset. Therefore, 1‐s from multiple distributed in longitude around Earth's circumference, onset can be regularly monitored. In present study we propose a new...
A method for determining the harbingers of an upcoming earthquake is proposed, based on effect appearance before event a high level topological similarity statistical functionals from set geomagnetic field measurements carried out at geographically mutually distant magnetovariation stations. The properties functional magnetic January 22 to February 6, 2023 stations located in Turkey, Crimea and Austria are investigated. It shown that 116 hours event, process “final preparation” approaching...
In order to investigate the resistivity structure beneath northern and southern branches of western part North Anatolian Fault Zone (NAFZ), which has been known as a seismic gap area, we started wideband magnetotelluric (MT) measurements on 27 July 1999, along north-south profile crossing branch near Izmit Iznik. When (Kocaeli) earthquake ( M w 7.4) occurred 17 August MT fields were being measured at five sites, four happened be located surface rupture zone associated with mainshock, large...
Volatile releases, in terms of CO 2 efflux and noble gas mantle origin, are investigated the Marmara region seismically active North Anatolian Fault (NAF) zone. A total 180 measurements (1 to 309 g m −2 d −1 ) were carried out along four transects across NAF. Spatial variability surface effluxes was higher at faulted sites, relative comparable background areas. The δ 13 C values soil −24.0 −15.6‰ without correlation with values, which suggest that anomaly is caused by fault‐related biogenic...
Magnetotelluric (MT) surveys were carried out along some profiles crossing the fault rupture zone associated with İzmit earthquake which took place on 17 August 1999 in western part of North Anatolian Fault Zone (NAFZ). In this paper, we focus where two different groups seismicity followed earthquake. One group was seen a narrow belt and corresponds to aftershocks occurring zone. The other circular region represents swarm activity, presumably triggered by occurrence Two-dimensional inversion...
Crustal fluids exist near fault zones, but their relation to the processes that generate earthquakes, including slow-slip events, is unclear. Fault-zone are characterized by low electrical resistivity. Here we investigate time-dependent crustal resistivity in rupture area of 1999 Mw 7.6 Izmit earthquake using electromagnetic data acquired at four sites before and after earthquake. Most estimates apparent frequency range 0.05 2.0 Hz show abrupt co-seismic decreases on order tens per cent....
Hourly mean values of X, Y and Z components the geomagnetic field from two observatories total intensity, F, eight monitoring stations were analysed to study behaviour solar lunar variations in northwestern part Turkey. The Chapman-Miller method was applied data first as a whole then by grouping it Lloyd's seasons calculate seasonal dependence harmonics. Amplitudes harmonics increase winter months summer months. both origins calculated annually compare with sunspot relative numbers see...
ABSTRACT Retardation in fatigue crack growth rate following the application of single and periodic tensile overloads was studied for 2024‐T3 7075‐T6 aluminium alloys. Tests were performed at constant stress intensity factor ranges, a load ratio R = 0.1, baseline Δ K 10–20 MPa√ m range which corresponds to Paris regime. Overload ratios 1.3–1.65 with overload spacing, n , varying from 20 10 000 cycles. displayed an order magnitude higher retardation, N d due compared 7075‐T6. Periodic induced...
The interaction between the solar plasma and Earth's magnetic field causes a number of current systems to develop in magnetosphere during storm. Compression by plasma, magnetopause current, ring are main responsible for typical storm recorded at mid- low-latitudes. In an attempt understand this interaction, spherical harmonic analysis is applied data measured Intermagnet observatories. As expected, when variation external coefficients examined, first coefficient, γ01, reveals phases more...
Summary The Artvin Dam and hydroelectric power station that has been built on the Çoruh River will have an average of production 1 billion kWH per year. It is far 20 km from south-west Province (Eastern Turkey). Havuzlu Landslide located in a slope boundaries village dam reservoir. which complex structure including groundwater paleo-landslide. paleo-landslide, potential sliding surface, possible fractures, crushed zones, geotechnical properties formations situation were investigated by 2D...
Summary The fundamental difference between solar, S, and lunar, L, is that L results from purely gravitational tidal movements. in frequency the movements of ionospheric conductivity makes it possible to distinguish two effects, whereas for S motions both have same frequency.The amplitude lunar semi-diurnal tide, L2, was determined each solar hour at an observation site IZN, compared with conductivity.
In this study the hourly mean values of geomagnetic data available in Turkey are analyzed to determine principal harmonics solar daily variations. Available grouped according sunspot relative number and for lunar harmonics. The most disturbed five calendar days each month removed order minimize effect current systems outer magnetosphere regions. Very good dependence found between number.