Abstract
Seismotectonic and seismoacoustic studies carried out during the expedition onboard the R/V ʺAkademik Boris Petrovʺ in the Pechora Sea revealed a paleoseismodislocation confined to a fault zone tracing the Severoural seismic lineament. The amplitude of this dislocation (the relative displacement of its sides) makes it possible to estimate the magnitude of the ancient earthquake that occurred within the Severoural lineament. Using the value of this magnitude, estimates were made of the maximum seismic impacts on offshore oil and gas facilities that are already in operation and are being designed for construction in the northeastern part of the Pechora Sea. These assessments of essential images differ in a big way from similar assessments made earlier. The method of searching for paleoseismic dislocations using seismoacoustic methods, as well as lineament analysis, can be used to assess the initial seismic impacts in water areas.
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