A5010634431- Earthquake Detection and Analysis
- earthquake and tectonic studies
- Seismology and Earthquake Studies
- Stellar, planetary, and galactic studies
- Seismic Waves and Analysis
- Solar and Space Plasma Dynamics
- Geophysics and Gravity Measurements
- Ionosphere and magnetosphere dynamics
- Astronomical Observations and Instrumentation
- Astro and Planetary Science
- Astronomy and Astrophysical Research
- Geophysics and Sensor Technology
- Marine and environmental studies
- Geomagnetism and Paleomagnetism Studies
- Oceanographic and Atmospheric Processes
- Seismic Imaging and Inversion Techniques
- Geochemistry and Geologic Mapping
- Gamma-ray bursts and supernovae
- History and Developments in Astronomy
- Reservoir Engineering and Simulation Methods
- GNSS positioning and interference
- Historical Astronomy and Related Studies
- Tropical and Extratropical Cyclones Research
- Climate variability and models
- Pulsars and Gravitational Waves Research
Aristotle University of Thessaloniki
2013-2024
University of Macedonia
1997
Abstract. In the last years disturbances in VLF/LF radio signals related to seismic activity have been presented. The data were collected by receivers located on ground or satellites. ground-based research implies systematic collection a network of receivers. Since 2000 "Pacific VLF network", conducted Japanese researchers, has operation. During 2008 receiver was developed Italian factory Elettronika (Palo del Colle, Bari). is equipment working and LF bands. It can monitor 10 frequencies...
According to the well-known Lithosphere Ionosphere Coupling (LAIC) mechanism, tectonic activity during earthquake preparation period produces anomalies at ground level which propagate upwards in troposphere as Acoustic or Standing gravity waves. Thus observing frequency content of ionospheric turbidity a well extended area, space and time, around an event we will observe decrease higher limit band. In this article review repeated observational results TEC turbulent band upper (TBUL) on...
Abstract. The tides for the Mediterranean Sea are described through a high resolution model (MEDI10) developed by assimilation of tide-gauge data and T/P into barotropic ocean tide model. Tidal parameters from 56 coastal stations around eight principal constituents: M2, S2, N2, K2, K1, O1, P1 Q1 20 O1 included in TOPEX/Poseidon with all corrections applied except bathymetry TOPO 13.1 were used development Numerical experiments carried out estimation friction velocity decorrelation length...
Aims.We report results of a quantitative colorimetric UBVRI analysis two flare events on the red dwarf EV Lac. The photometric data were obtained in September 2004, during multi-site synchronous monitoring from four observatories Ukraine, Russia, Greece, and Bulgaria. These observations confirmed presence small-scale high-frequency oscillations (HFO) initially detected by Rodonó (1974, A&A, 32, 337) recently reconfirmed authors. Here we discuss color characteristics flares HFO.
VLF/LF (20 - 300 kHz) radio waves propagation is affected by different factors such as meteorological conditions, solar bursts and geomagnetic activity. At the same time, variations of some parameters in ground, atmosphere ionosphere occurring during preparatory phase earthquakes can produce disturbances previous signals along their paths: these are precursors. Since 2009, several receivers have been installed throughout Europe order to realize a European (VLF/LF) network for studying...
Abstract. In this paper the Total Electron Content (TEC) data of eight Global Positioning System (GPS) stations EUREF network (AUT1, Thessaloniki, TUC2, Crete in Greece, MATE, Matera, LAMP, Lampedusa Italy, GAIA, Portugal, RABT, Rabat, EVPA, Evpatoria Ukrain and TRAB, Trabson Turkey) were analysed using wavelet analysis order to detect any frequency dependence correlation between TEC over different stations. same time Dst (Global geomagnetic field disturbances) variations each GPS station...
Since 2009 a network of VLF (20 - 60 kHz) and LF (150 300 radio receivers is operating in Europe order to study the disturbances produced by earthquakes on propagation these signals. In 2011 was formed nine receivers, which three are located Italy one Austria, Greece, Portugal, Romania, Russia Turkey. On May 19, 2001 an earthquake (Mw = 5.7) occurred western Turkey, that inside “sensitive” area network. The data collected during April-May were studied using Wavelet spectra, Principal...
This paper is one of a series papers dealing with the investigation Lower ionospheric variation on occasion an intense tectonic activity.In present paper, we investigate TEC variations during seismic activity in transition between Dead Sea fault and East Anatolian (SE Turkey) February 6th, 2023. The Total Electron Content (TEC) data are been provided by EUREF Network. These were analysed using Discrete Fourier Analysis order to turbulence band content. results this indicate that...
We report on the recent earthquakes (EQs) that occurred, with main shock 6 February 2023, principally in central southern part of Turkey and northwestern Syria. This region is predisposed to because tectonic plate movements between Anatolian, Arabian, African plates. The seismic epicenter was localized at 37.08°E 37.17°N depth order 10 km magnitude Mw7.8. use Graz’s very-low-frequency VLF facility (15.43°E, 47.06°N) investigate amplitude variation Denizköy transmitter, Didim district Aydin...
Abstract. The tidal changes of the barometric pressure in area Thessaloniki were studied by analysing a sample 21 years hourly measurements. resulted parameters (amplitude and phase difference) considered as "mean values" corresponding for this long time period. Using these parameters, computed subtracted from observations. Assuming that residuals might include local (in terms time) information,the residual series was split blocks new analysis performed each block separately. amplitude...
<p>Based on the results of our previous studies concerning tidal triggering effect seismicity in Greece, we consider confidence level earthquake occurrence - period accordance as an index tectonic stress criticality, associated with occurrence. Then, investigate whether recent increase seismic activity at Fthiotida Greek mainland indicates faulting maturity and possible production a stronger earthquake. In this paper present investigation.</p>
Abstract. The tides for the Mediterranean Sea are described through a high resolution model (MEDI10) developed by assimilation of data into global TPXO7.2 ocean tide model. Tidal parameters from 54 coastal tide-gauge stations around eight principal constituents: M2, S2, N2, K2, K1, O1, P1 and Q1 20 O1 included in TOPEX/Poseidon with all corrections applied except bathymetry ETOPO2 were used development tidal procedure compared corresponding extracted Comparisons carried out other published...
Abstract. Changes of barometric pressure in the area Thessaloniki Northern Greece were studied by analyzing a sample 31 years hourly measurements. The results this analysis on periodicities tidal components are expressed terms amplitude and phases variability. An earlier investigation revealed detectable correlation between exalting parameters waves with strong seismic events. A problem work was that we had compared resulting from data covering period one year instantaneous events, although...
Abstract In this paper we present the results of analysis B ‐light curve for flares red dwarf YZ CMin (dM4.5e), which were observed on February 2002, with help 30‐inch Cassegrain telescope Stephanion Observatory, Greece. Discrete Fourier Transform and use Brownian Walk noise enable us to estimate proper random detect possible weak transient optical oscillations. Our indicate that: (1) Transient high frequency oscillations occur during flare event quiet‐star phase as well. (2) The frequencies...