Research directions
The scientific researches in the observatory are focused in the following directions:
- monitoring of geophysical fieds, geoinformatics
(Geophysical Monitoring Laboratory), - global electrical circuit and atmosphere electricity
(Geophysical Monitoring Laboratory), - dynamics of a solar wind and magnetosphere of the Earth
(Laboratory for Dynamics of Geophysical Wave Fields), - paleomagnetizm and evolution of the Earth's magnetic field
(Laboratory for Paleomagnetism and Physicochemical Properties of Rocks), - magnetic analysis of mountain rocks
(Laboratory for Paleomagnetism and Physicochemical Properties of Rocks), - study of a stress-deformation state of Earth crust of seismoactive regions
(Geophysical Monitoring Laboratory).
Geoelectromagnetic monitoring
The data logging network functions in the Geophysical Monitoring Laboratory. The main datalogging system is equipped by analog-to-digital converter with 16 input channels, resolution is 16bits/channel, sampling rate is 10 Hz. Now there are registered in a digital format the following geophysical fields:
- Hx - the north-south component of geomagnetic pulsations;
- Hy - the east-west component of geomagnetic pulsations;
- Hz - the vertical component of geomagnetic pulsations;
- Hp - the component of geomagnetic pulsations, parallel to mean geomagnetic field ;
- Ex - the north-south component of telluric electric field;
- Ey - the east-west component of telluric electric field;
- Ez - the vertical component of telluric electric field;
- Ja - the vertical component of atmospheric electric current;
- Ea - the vertical component of atmospheric electric field;
- dF - Doppler frequency shift (ionosphere sounding).
Besides the main data logging system the computers for registration of geomagnetic field variations from the fluxgate-magnetometer and the INTERMAGNET automatic geomagnetic observatory are included into a datalogging network, as well as meteorological data from the digital meteorological station WS-2500, ultrasonic meteostation METEO-2 and sodar Volna-3.
Geography coordinates of observation point are 58.03N, 38.97E.
Correct geomagnetic coordinates of observation point are 53.53N, 114.28E.
Mac Elwain parameter us L=2.88.
Geoinformatics
The Database of middle-latitude Borok Geophysical Observatory, is supported by the Geophysical Monitoring Laboratory.
The Database contains results of air electric, geoelectromagnetic and meteorological observations. The data storage and access via Internet are provided by the database surver.
Global electrical circuit and atmosphere electricity
The global electric circuit represents a current contour formed by conducting layers of the bottom ionosphere and an Earth's crust, with thunderstorm generators as the basic sources of electric forces and nondisturbed areas of a free atmosphere as zones of returnable currents. The researches are focused on studying of global, regional and local generators of the atmosphere electricity, determining of the influence of the ionosphere and processes in an earth's crust to atmospheric electric characteristics, creation the experimental data bases of the basic aeroelectric parameters.
Dynamics of a solar wind and magnetosphere of the Earth
The main purpose of the researches are the studying of the origins and evolution of the low-frequency waves in a solar wind and the Earth magntosphere; the studying of the structure change of the field longperiod irregular geomagnetic pulsations by the data of Arctic and Antarctic observatories; the researches of geomagnetic pulsations, dynamics of solar and geomagnetic activity, based on the methods of nonlinear chaotic dynamics.
Paleomagnetizm and evolution of the Earth's magnetic field
As the result of prolonged field and laboratory studies carried out on a huge number of sections of different geological age, a behaviour of the ancient geomagnetic field for the past 400 billions years is obtained. The data comprised a basis of the global paleointensity database, complied by members of the laboratory in collaboration with French colleagues under umbrella of the International Association on a Geomagnetism and Aeronomy. Large volume and excellence quality of the data obtained allowed us to speak out a new scenario of global long-term evolution of the Earth's magnetic moment in the Phanerozoic. In the theory of geodynamo principles of a separation of a main part of the geomagnetic field into a quasistationary (characteristic time period is about 1 billion years) and a small in amplitude oscillating (characteristic time period is 1-10 thousands years) components, is obtained.
Magnetic analysis of mountain rocks
In the field of rock magnetism the international recognition was given to the so-called thermomagnetic criterion by Bol'shakov-Shcherbakova of determination of a domain structure of ferrimagnetic grains of rocks. For the purposes of an evaluation of reliability of paleomagnetic data, a considerable attention is given to study of transformations of ferrimagnetics at the postcrystallized period. The data obtained allow us to evaluate quantitatively a stability of titanomagnetites (constituting the main body of ferrimagnetic minerals in igneous rocks) to the oxidation and the disintegration at the Earth's surface conditions.
Study of a stress-deformation state of Earth crust of seismoactive regions
Method of diagnostics of a stress-deformation condition earth crust of seismoactive regions on types of destruction (fragile or viscous) is offered which are identified on character of the first entrance of P-waves of weak earthquakes. The basic outcomes are covered in papers and scientific reports. Now we realize monitoring earth crust rigidity for the earthquakes prediction. At the moment such activity is carried out for California. The initial information is daily requested from a database of local seismic networks.