GEOPHYSICAL RESEARCH, 2020, vol. 21, no. 2, pp. 48-60. https://doi.org/10.21455/gr2020.2-4
UDC 550.34.06
Abstract References Full text (in Russian) Full text (in English)
ACCURACY OF EPICENTERS LOCATION OF SEISMIC EVENTS BASED ON “MIKHEVO” SMALL-APERTURE SEISMIC ARRAY DATA. DO ADDITIONAL SEISMIC STATIONS NEEDED?
I.A. Sanina, S.G. Volosov, A.G. Goev, N.L. Konstantinovskaya, M.A. Nesterkina, S.A. Tarasov
Sadovsky Institute of Geospheres Dynamics, Russian Academy of Sciences, Moscow, Russia
Abstract. The results of evaluating the accuracy of determining coordinates of the epicenters of seismic events that are registries by small-aperture array Mikhnevo are given. Quarry blasts located in the central part of the East European platform were used as a source of the events. With confident identification of seismic wave arrivals (signal to noise ratio ≥ 2), the small-aperture group independently provides high location accuracy and subsequent association of the event with the nearest quarry in coordinates. It is shown that the accuracy of the location strongly depends on the microseismic level, i.e. from signal to noise ratio. With a low signal to noise ratio (R≤2), the accuracy of the location decreases and in this case, the data received from the additional seismic stations can be useful.
Keywords: East-European craton, temporary seismic network, small-aperture seismic array, waveforms, seismic events.
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