Purpose. It is well-known that strong earthquakes are typically accompanied by some phenomena which relate to variations of natural electromagnetic fields. Based on the idea about the mechanism of lithosphere–atmosphere–ionosphere coupling we expect to detect some precursors of strong natural earthquakes in electromagnetic data sets recorded by magnetotelluric instruments far enough from epicenters.
The structure of the geoinformation software «Seismicity of Magadan Region» which united 4872 seismic events (with K from 3.4 up to 16.8) occurred in Magadan region and on the surrounding areas from 1735 to 2011. As a result of geoinformation system usage errors in determination of the positions of 9 large earthquakes (К³12,0) on the given territory from 1988 to 1997 were found.
For the first time for Transcarpathian region the solution of the focal mechanism of perceptible earthquake was solved. Earthquake occurred under the influence of the horizontal compression, oriented in latitudinal direction and near-horizontal tension of the submeridional orientation. A first-motion type in the source – strike-slip combined with reverse-oblique.
The space-time properties of the forshock-aftershock successions of earthquakes of Crimea, especially, performance of Omori's and Gutenberg-Richter laws are observed.
In the paper discusses the features of long-term seismicity (1961-2010) the territory of Transcarpathian depression and separate seismoactive zones (A, B and C). The relationship of these zones with the main tectonic elements of depression is set. It is proved that the boundary between zones A and B passes through Oash deep fault.
Temporal variations of induction vectors in the Transcarpathian active seismic zone were investigated. Analyses of long-term series of magnetic-variation observations let’s to made a conclusion about correlations of Wise vectors variations with seismic processes in the crust and, also, about perspectives of a method’s implementation in detection of local earthquakes precursors (with M>3 magnitude) in the geological-geophysics conditions of the Transcarpathians trough.
The earthquakes monitoring in all world reveals that the “seismogenic” fluctuations of magnetic field in wide frequency band often occur before these seismic events. We believe that the most reliable information is concentrated in ultra low frequency (ULF) band (0.001-3 Hz). The earthquake ULF magnetic precursors of lithospheric origin are very weak as a rule and their frequency range is overlapping with signals of ionospheric origin. The new method of the seismomagnetic signals selection at the background of more powerful magnetic variations of other nature is proposed.
Summarizes the results of preliminary studies to ascertain the nature of earthquakes and seismic safety in the provision of technologically-risk areas Krivoy Rog iron ore and coal basins Pavlograd. The possibilities of highly sensitive seismic stations UK15, established in Dnepropetrovsk (n. Mirnij), check local and remote Kryvyi Rih and Pavlogradskij earthquakes.
Shows the short history of seismological observations in the Carpathian region, the necessity of improving the seismic equipment and automation of processing the data. Is the list of existing seismic stations, their equipment and basic parameters layout. Given a list of problems to be solved by using materials obtained seismological observations. Shows the main directions of modernization of the hardware receive seismic information, communications and software.
In the paper the results of the conducted analysis of records of the registered seismic event which was take place 2011.01.14 in Kryvyi Rig and arguments in favour of determine this event as earthquake are presented.