Seismic instruments: article

New opportunities for epicentral observations
N.K. Kapustian 1,2 E.V. Shakhova 1 G.N. Antonovskaya 1
1 N. Laverov Federal Center for Integrated Arctic Research of the Ural Branch of the Russian Academy of Sciences 2 Schmidt Institute of Physics of the Earth, Russian Academy of Sciences
Journal: Seismic instruments
Tome: 58
Number: 3
Year: 2022
Pages: 78-93
UDK: 550.34
DOI: 10.21455/si2022.3-5
Keywords: three-component registration, frequency band, microseisms, coherence function, time series, auto structural function
Аnnotation: The hardware and methodological possibilities for increasing the information content of seismological obser-vations in the epicentral zone of a platform earthquake without obvious surface manifestations are considered. We have shown that it is effective to use the analysis of the microseismic background both for the source location and to clarify the features of the environment geodynamics in the earthquake epicentral zone when installing several temporary seismic stations. The results of the three-component microseism coherent-time analysis allows to identify endogenous microcracks hidden by microseismic noise. We have evaluated their power, calculated their number and azimuths. The possibility of using an auto-structural function for the tem-poral variation of microcracks stream during long-term registration is shown in order to identify the self-organization of crustal blocks by similarity in their geodynamics. The seismic equipment requirements for such observations are discussed.