Seismic instruments: article

Аnnotation: An assessment of the efficiency of the network of seismic stations on the territory of the Udina volcanic complex (UVC), which consisted of 29 instruments, located irregularly in the territory, was carried out. At different points of the UVC, earthquakes of different minimum energy class and with different accuracy are recorded. The calculation of the minimum energy classes for the seismological network of the UVC of 29 seismic stations shows that with an increase of the stations about 30 thousand, such a network throughout the territory under consideration reliably registers earthquakes equal 7.0 minimum energy classes, which corresponds to a magnitudes of ~2.5. The values of errors in determining the coordinates of earthquake epicenters in latitude (δφ) and longitude (δλ), within the network, do not exceed 0.4 km. The values of errors in determining the depths of earthquake foci ( H ) in the center of such a network does not exceed 0.2 km, and within the entire UVC territory does not exceed 5.0 km. For these calculations, the errors in determining the travel time and propagation velocities of seismic waves were set equal to 0.1 s and 0.1 km/s, respectively, and could be both random and systematic.