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PARAMETERS OF THE RUPTURE PLANES OF THE SPITAK FOCAL ZONE CONSTRUCTED BY AVERAGED AFTERSHOCK MECHANISMS
1 Institute of Geophysics and Engineering Seismology named after academician A. Nazarov, National Academy of Sciences of the Republic of Armenia
2 Schmidt Institute of Physics of the Earth, Russian Academy of Sciences
2 Schmidt Institute of Physics of the Earth, Russian Academy of Sciences
Journal: Geophysical processes and biosphere
Tome: 19
Number: 1
Year: 2020
Pages: 79-86
UDK: 550.34
DOI: 10.21455/GPB2020.1-5
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KAZARYAN K.S., BURMIN V.Y., AVETISYAN A.M. PARAMETERS OF THE RUPTURE PLANES OF THE SPITAK FOCAL ZONE CONSTRUCTED BY AVERAGED AFTERSHOCK MECHANISMS // . 2020. Т. 19. № 1. С. 79-86. DOI: 10.21455/GPB2020.1-5
@article{KAZARYANPARAMETERS2020,
author = "KAZARYAN, K. S. and BURMIN, V. Y. and AVETISYAN, A. M.",
title = "PARAMETERS OF THE RUPTURE PLANES OF THE SPITAK FOCAL ZONE CONSTRUCTED BY AVERAGED AFTERSHOCK MECHANISMS",
journal = "Geophysical processes and biosphere",
year = 2020,
volume = "19",
number = "1",
pages = "79-86",
doi = "10.21455/GPB2020.1-5",
language = "English"
}
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Keywords: earthquakes, focal mechanisms, Spitak earthquake, aftershocks
Аnnotation: Built focal mechanisms of aftershocks Spitak focal zone of the Spitak earthquake 07.12.1988. To construct focal mechanisms, the method of averaged mechanisms was used, in which data from the international seismological center were used. Along the boundaries of active faults of the study area, 4 blocks are distinguished, with pairs of compressive tension forces different in directions. The prevailing types of movements in the foci of the Spitak earthquake aftershocks are revealed. It is revealed that the prevailing uplift type of movement in the aftershock foci changes from the rupture of the Spitak earthquake in the northern and southeastern direction to the predominant shear type. Solutions of the averaged mechanisms for the selected blocks, the parameters of faults, the angles of incidence and strike, the types of movements were obtained. It is shown that the nodal planes reflect tectonically active faults.
