A5086738880- Earthquake Detection and Analysis
- Seismic Waves and Analysis
- earthquake and tectonic studies
- Geophysical and Geoelectrical Methods
- Geomagnetism and Paleomagnetism Studies
- High-pressure geophysics and materials
- Turkish Literature and Culture
- Solar and Space Plasma Dynamics
- Cultural and Sociopolitical Studies
- Metallurgy and Cultural Artifacts
- Seismology and Earthquake Studies
- Ionosphere and magnetosphere dynamics
- Maritime and Coastal Archaeology
- Geological and Geochemical Analysis
- Geophysical Methods and Applications
- Geochemistry and Geologic Mapping
- Reservoir Engineering and Simulation Methods
- Inertial Sensor and Navigation
- Geological and Geophysical Studies Worldwide
- Ancient Mediterranean Archaeology and History
- Geophysics and Gravity Measurements
- Medical and Biological Sciences
- Ottoman and Turkish Studies
- Geological and Geophysical Studies
- Astronomical Observations and Instrumentation
Boğaziçi University
1991-2014
Kandilli Observatory and Earthquake Research Institute
1991-2014
Istanbul University
2012-2013
Tokyo Institute of Technology
1991
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,...
Electric and magnetic data were obtained above the focal area in association with 1999 Izmit, Turkey earthquake. The acquired are extremely important for studies of electromagnetic phenomena associated earthquakes, which have attracted much attention even without clear physical understanding their characteristics. We already reported that large electric variations observed during earthquake simply due to seismic waves through mechanism dynamo effect, because they appeared neither before nor...
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...
The first magnetotelluric study in the Marmara Sea, Turkey, was undertaken to resolve structure of crust and upper mantle region, determine location westward extension North Anatolian Fault (NAF) Çinarcik area. Long-period ocean bottom data were acquired at six sites along two profiles crossing Basin, where a significant increase microseismic activity observed following devastating 1999 İzmit Düzce earthquakes. 2-D resistivity models indicate existence conductor depth ∼10 km middle both with...
Abstract The magnetotelluric (MT) method has been applied to show resistivity variations in the vicinity of epicenter 1999 Düzce earthquake ( M w = 7.2) where a large rupture velocity difference was seen between western and eastern parts epicenter. MT data for frequencies ranging 320 0.0005 Hz were acquired along two parallel profiles west east earthquake’s Both crossed basin fault north North Anatolian Fault (NAF) south. analysis shows almost two-dimensionality region, at depth starting...
The magnetic north (H), east (D) and vertically downward (Z) components of the geomagnetic field were monitored at Elazig?, Turkey, with a three-component fluxgate magnetometer during 1999 August 11 total eclipse Sun. results compared those obtained an identical instrument Kandilli observatory, which is similar latitude to but clear band totality. An increase D found eclipse, rising maximum close time eclipse. reality this effect confirmed by noting feature, also centred on number European...
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....
Observations of the geomagnetic total intensity have been carried out from time to in a possible seismic gap region western part North Anatolian Fault Zone (NAFZ), an attempt trace faultlines through magnetic characteristics and also relate fault activity. Here we report results profile measurements made across Iznik-Mekece as well our interpretation. The anomalies which found near Iznik City are similar with ones that along eastern hence they could be interpreted terms dike-like structure...
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...
With a view to encouraging magnetic observatory staff make fuller use of their own data, simple but rigorous method is presented for the determination coherent, periodic variations from long series data. The readily adaptable different types data published by observatories, able cope with gaps in tuneable any desired frequency and can run on modest PC. As an illustration method, it has been applied Kandilli Observatory.
Measurements of the geomagnetic total intensity were carried out in western part North Anatolian Fault Zone. In particular, profile measurements made across some fold structures graben. The data show anomalies presumably related to active folds, although are not necessarily accompanied by magnetic anomalies. similar those found along faults Zone, and they could be interpreted terms a dike-like structure model as was case for associated with faults. This implies that folding may surface...