Seismic instruments: article

V.Y. Burmin
Schmidt Institute of Physics of the Earth, Russian Academy of Sciences
Journal: Seismic instruments
Tome: 54
Number: 3
Year: 2018
Pages: 56-69
UDK: 550.312
DOI: 10.21455/si2018.3-4
Keywords: seismic stations, optimal geometry of seismic networks, energy class of earthquake, earthquake magnitude and hypocenter
Аnnotation: The modern seismological network of the Caucasus contains a little more than three hundred seismic stations. Despite the fact that the number of stations is rather large, they are not evenly distributed on the territory of the Caucasus. Therefore, in spite of the fact that in general the Caucasian seismological network is quite effective, earthquakes of different minimum energy class and with different accuracy are recorded at different points. To ensure that events occurring at different points in the Caucasus, the observation system records with the same accuracy and one minimum energy class, it is necessary that the seismic stations of the system be located more evenly throughout the territory, that is, the observation system should have an optimal configuration. Calculation of the minimum energy classes for the optimal seismic network of the Caucasus of 55 seismic stations shows that if an increase of all stations will 50,000, then they will confidently register earthquakes of the energy class k =9 and more in the whole territory of the Caucasus, which corresponds to the magnitude of m =2.6. The errors in the determination of the coordinates of epicenters of earthquakes in latitude and longitude within the network will not exceed 1.0 km. The errors in determining depths of earthquake foci in the center of the network will not exceed 1.0 km, in the entire Caucasus - 10 km.