Seismic observations in the Altai-Sayansk region, one of seismic-prone zones in Russia, are a part of the federal observations over natural and man-caused factors. The territory of the region in question makes more than 1.5 ∙ 106 km2 includes 13 subjects of the Russian Federation and three border areas of the neighboring countries: Kazakhstan, China, Mongolia. Annually, instruments record a few thousands of seismic events from which approximately for one thousand earthquakes and for one and a half thousand industrial explosions. Coordinates, origin time, and energy are determined for these events.
The quality of the information received depends on the instrumental equipment of points of observations, hardware and software of the center of gathering and processing data in Novosibirsk, as well as on the number and disposition of network stations.
The beginning of the 21st century became a starting point for the Altai-Sayansk region seismic network as concerns the work with the new instruments: in 2000, all the stations of the network became digital, equipped with Baikal-11 local product. Digital recording, as well as updating with new stations have demanded to estimate anew the capabilities of the network in terms of representativeness and the accuracy of definition of hypocenters parameters. The methods of estimating the quality of recording of seismic events (earthquakes, explosions, mountain blows, etc.) are stated and have not undergone modifications as well as techniques of processing records of seismic events for obtaining parameters of hypocenters. However, the new capabilities of the instruments have allowed one to essentially expand the territory representative recording the earthquakes of low-energy classes.
The objective of this research is planning of zonal network of seismic stations (NSS) which could provide the solution to the following tasks:
- Seismic monitoring of a section of intensive man-caused impacts ac tions (on an example of the city of Kemerovo and adjoining territories) at a "weak seismicity" level, i.e., under the condition of the lower limit of representativeness of seismic events not exceeding 4-5 energy classes.
- Recognition of records of industrial explosions and earthquakes.
- Estimation of a depth of the focus of seismic events independent of their nature.