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Civil aircraft navigation uses specific procedures for the continuous determination of the aircraft position using the path and distance traveled in the considered time interval as calculation elements. Throughout the route, errors must be estimated that are generated by a series of parameters such as: hydrometeorological conditions, air current direction, declination, geoid parameters, the ship's nautical qualities and the response mode of the navigation equipment. The indications of the magnetic compass must be ...

The geomagnetic field varies in time and space, being a signal composed of periodic and non-periodic elements and is monitored in a triaxial system at observatories around the world. Based on data from INTERMAGNET observatories, we analyze the strongest storm of 2026, which occurred during January 19-21. The methodology used is spectral evaluation (Fourier, wavelet, signal decomposition into approximations and details with various functions on different levels, etc.). The wavelet technique allowed us to analyze th...

The geomagnetic field varies in time and space, being a signal composed of periodic and non-periodic elements and is monitored in a tri-axial system within the geomagnetic observatories of the INTERMAGNET network across the planet. In the work, based on these data, we use for spectral evaluation (Fourier, wavelet, signal decompositions in approximations and details with various functions on different levels, etc.) in order to analyze different geomagnetic phenomena (such as: geomagnetic storms, disturbances, etc.)...

Within the core project called "Geomagnetism, a modern tool in space weather forecasting and rapid response to associated natural hazards for the protection of critical infrastructures and national air traffic security", we implemented a Web-GIS platform with ARCGIS Server, which can be viewed in an internet browser at: http://harti.igr.ro/masuratori_aeroporturi. The thematic layers in the application, at the level of the entire country, are the locations of magnetic declination measurements for all airports in Ro...

Through the complex analysis of the geomagnetic database of the Surlari Geomagnetic Observatory for over 80 years, corroborated with the data of other planetary observatories from the INTERMAGNET network, we have extracted the geomagnetic information that is correlated with the specific physical parameters of space weather domain. Space weather refers to the conditions and phenomena occurring in outer space that can influence the near-Earth space environment. This concept includes a variety of events and condition...

In this work, I used the data from the geophysics portal of the Geological Institute of Romania (maps, sections), field measurements as well as the WGM 2012 model from the International Gravimetric Bureau. The measurements carried out in the south of the Southern Carpathians were represented by magnetometric measurements. Corroboration of geophysical information with geological and tectonic ones led to the confirmation of deep structures. The geological sources, which give geophysical samples specific to each geop...

The main objectives of this study are: analysis of the associated spectrum of the geomagnetic field, time of occurrence of geomagnetic storms and comparisons between recordings made at various geomagnetic observatories in the INTERMAGNET network, in terms of frequency intensity identified and correlations during geomagnetic disturbances. A geomagnetic storm is a temporary disturbance of the Earth's magnetosphere caused by ejections of solar corona mass, coronal holes or solar flares. The data used in this paper ar...

Geomagnetic disturbances and their associated phenomena can be an important parameter as data input in climatology studies and climate change. This paper is a preamble to a deliverable "Development of a catalog on the typology of geomagnetic variations based on records from the Surlari Geomagnetic Observatory" within the Space Weather project which is part of the complex multidisciplinary project „Institutional capacities and services for research, monitoring and forecasting of risks in extra-atmospheric space” wh...

The seismic surveys, carried out in various stages, highlighted two domes, placed on the eastern flank of the outpost of the Eastern Carpathians, in the Pralea - Focsani Depression. According to the Bouguer and filtered gravimetric images, the two domes (Fitionesti - Trotusanu and Movilita) are placed approximately 12 km east of the axis of the outpost, on a single major gravimetric maximum. But, while the south-eastern dome (Movilita) determines an important local gravimetric maximum (+6 mgal. On the residual gra...

The study begins with a synthetic presentation of geological and geophysical data at this time. The geological data come from the detailed geological mapping superimposed over the previously elaborated geological maps (at scales 1: 200000 and 1: 50000). The data on the deep structure come from the magnetotelluric and seismic sections interpreted. Of course, the documentation obtained from previous referenced publications and the specialized sites brought an extra knowledge. We performed a multiparametric correlati...

The Auto-Regressive Integrated Moving Average (ARIMA) model is widely used to forecast non-stationary time series data. In a model of ARIMA (p, d, q), AR is autoregressive, p is the number of regression terms, MA is the moving average, q is the number of moving average terms, and d is the difference time to make the data a stationary series. It can be used to forecast the trend of geomagnetic disturbances. Firstly, the non-stationary historical data xt is processed by the d difference to develop the stable histori...

In the NW part of the Romania, there are geological conditions that allow to geothermal phenomena to manifest on the surface of the Earth. The limited exploitation of this energy resource is still limited by existing technologies and by the high cost of deep-water equipment. For a good image of the Romania's geothermal potential, we present, in our paper, the temperature map at 3000 m deep and the geothermal flow map on the surface. These maps were made with the Surfer program, based on the data obtained through d...

Geomagnetic data used for the study of the large periodicities of the geomagnetic field are presented as a series of hourly averages covering two solar cycles. These data were downloaded from the ftp site of the World Data Center for Geomagnetism from Kyoto. These data were calculated annually based on final data both from analogue magnetograms and digital recordings. To study the diurnal variations, non-periodic variations (geomagnetic storms, phenomena SSC or SFE) were used as one-minute averages, recorded in Su...

The continuous development of data acquisition and processing techniques in planetary geomagnetic observatories and satellite data, allows at this time to extract as complete information about the morphology and evolution over time of the terrestrial geomagnetic field. The Sun, the source of all energy on Earth, heat the planet and drive the motions of atmosphere. The brightness of the Sun with 11-years solar cycles with 0.1% variation may be explaining the major driving changes in weather patterns on Earth. At th...

The separation between the mobile plate (Phanerozoic) in south and west of the eastern European Precambrian East European Craton is the most prominent geological limit in Europe known as the Trans-European Suture Zone (TESZ) In this study we were mainly interested in a prominent segment of TESZ, known as the Tornquist -Teisseyre Area (TTZ). In this study we highlighted the TTZ area through the gradient of geoid from Romania. The geoid provides a good representation of the long wavelength characteristics of the Ear...

Space weather can be monitored from the ground (astronomic/astrophysics observations and geomagnetic observatories) and from space (satellite data). Optical instruments (telescopes on the ground) recording the number of sun spots, as well as to viewing aurora, but these observations are affected by the weather from Earth's atmosphere. Observation from space does not have such a limitation. In the last years,satellites and spacecraft have monitoring the space weather. Through cooperationbetween European Space Agenc...

In this paper we have developed a set of multi-parametric data analysis programs, which can be used in hydrogeological studies. Considering that in these studies we use large sets of multi-parametric data with spatial and temporal distribution we focused on the analysis with polynomial tendencies surfaces and hypersurfaces, analysis by moving average with different dimensions of windows and analysis of the variance of the correlation factor with mobile window. The first part of the paper is dedicated to the descri...

Within the global hydrological cycle, by redistributing the water masses, there are variations of the gravitational field as a result of changing the subsurface density and the atmospheric masses. For the use of gravimetric data in the hydro-geological modeling it is necessary to correct the direct and indirect effect of gravity due to the altitudes at each point on the topographic surface. Also, based on the variation of the gravitational field according to the selected time intervals (monthly, seasonal, yearly),...

For the analysis of various geological featur es can be derived from minimal anomalies caused by mass distributions, we present an ex tensive geophysical re cords. It is quite clear that at this stage; on ly a comprehensive analysis of data submitted by the various branches of geology can advance our knowle dge on geological structure and causes for it. Classical correlation between gravity anomalies of sedimentary basins of major minimum and is the most common significant abnormalities that may be of this type.