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Revealing Paleoseismic Dislocations in the Region of St. Petersburg Based on Remote-Sensing Data

  • USE OF SPACE INFORMATION ABOUT THE EARTH STUDYING CATASTROPHIC NATURAL PROCESSES FROM SPACE
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Abstract

The intensity of paleoearthquakes in the territory under study has been estimated by two methods: from the maximum displacement of Quaternary rocks induced by ruptures and from the parameters of clastic dikes of seismic genesis. Based on the use of archival materials from space surveys and Google Earth images, a method for searching for paleoseismic dislocations is substantiated. Searches for seismic manifestations within the Yukki—Toksovo fault zone have been carried out and forty seismogenic scarps have been discovered, some of which are opened by ditches. The study of the scarps makes it possible to estimate the intensity of earthquakes of the late and middle Holocene in this area, respectively, at 7.2 and 6.8 magnitudes. The deep structure of the area of concentration of paleoseismic dislocations has been studied by the spectral-seismic profiling method.

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ACKNOWLEDGMENTS

I thank A.G. Glikman, director of Geofizprognoz, for carrying out spectral-seismic profiling.

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  1. LLC “EkspertGaz”, St. Petersburg, Russia

    S. N. Nevolin

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  1. S. N. Nevolin
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Correspondence to S. N. Nevolin.

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Translated by E. Smirnova

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Nevolin, S.N. Revealing Paleoseismic Dislocations in the Region of St. Petersburg Based on Remote-Sensing Data. Izv. Atmos. Ocean. Phys. 57, 1003–1011 (2021). https://doi.org/10.1134/S0001433821090565

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  • DOI: https://doi.org/10.1134/S0001433821090565

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