Seismic instruments: article

V.Y. Burmin
Schmidt Institute of Physics of the Earth, Russian Academy of Sciences
Journal: Seismic instruments
Tome: 54
Number: 2
Year: 2018
Pages: 24-32
UDK: 550.312
DOI: 10.21455/si2018.2-2
Keywords: seismic stations, effectiveness of observing systems, energy class of earthquake, magnitude of earthquake, hypocenter
Аnnotation: To solve many geological and geophysical problems, in particular the forecast of strong earthquakes, seismic zoning and earthquake-proof construction, it is necessary to have reliable data on the distribution of hypocenters of earthquakes in the study area. In turn, the completeness of data on the distribution of earthquake hypocenters and the accuracy of their determination largely depends on the effectiveness of the observational system. This article assesses the effectiveness of the Caucasian network of seismological observations consisting of 258 stations. The effectiveness of the seismological observation network is the ability of the network to record at certain epicentral distances events with minimal magnitudes is implied and allows, depending on the location of the hypocenter of the earthquake, determining its main parameters (time in the source and coordinates of hypocenters) with minimal errors. Calculation of the minimum energy classes for the seismological network shows that in the case when all the Caucasus stations have the increase 30,000 the network confidently registers earthquakes of the 9th energy class and more, which corresponds to the magnitude of 2.8. The errors in the determination of the coordinates of epicenters of earthquakes in latitude and in longitude in the center of the network does not exceed 0.4 km, and on the periphery of the network 1.0 km. The values of errors in determining the depths of earthquake source by the system in the center of the network do not exceed 1.0 km, in the entire Caucasus it does not exceed 10 km.