Earthquake of 31.VIII.1829 in Аrkhangelsk government: reobservation and more precise parameters according with primary sources and the question of the North-Dvina fault about

Research subject. The object of the study is the littleknown earthquake of 1829 in the North of European Russia on the average course of the Northern Dvina River (Arkhangelsk district). This event is included in domestic seismological catalogs, but without reliance on primary written sources.

Materials and methods. The materials laid by the authors of the study include publications in periodicals immediately after the event, additional information from the local edition of 1864, as well as images of local religious buildings that experienced tremors, i.e. a variety of previously not involved macroseismic information.

Results. Based on the new information, estimates of the strength of the tremors of 3 shocks in points were carried out according to the MSK-64 scale, and the main procedure was used to determine the main focal parameters of each shock. The epicenter is relocated, the macroseismic event field is presented. The intensity of the main shock VI or VI+ points.

Conclusions. The results are new and more representative than those available to seismologists before. In addition, new macroseismic data were compared with young faults, as a result of which the genetic connection of the earthquake with a large active fault under the valley of the Severnaya Dvina River was determined. This establishes the possibility of moderate earthquakes not only on the Fennoscandinavian crystalline shield and in the folded structure of the Urals, but also in the North of the East European platform.

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