Abstract
This article is the result of previous studies to clarify the seismicity of the White sea, supplemented by similar studies on the continental part of the Republic of Karelia. The relocated catalog of earthquakes was created for the period from 2005 to 2016 for White Sea and the Karelian region. With the help of proven methods, the parameters of the epicenters of identified earthquakes were relocated and a map of current seismicity was obtained. The parameters of the epicenters were specified using BARENTS travel-time model, a single methodological approach (using Generalized beamforming) and all currently available source data and bulletins of Russian and foreign seismic stations. The obtained seismic catalog allowed us to identify the main patterns of the distribution of current seismicity in the White Sea region. Seismicity of the White sea and the Karelian region is characterized as low-magnitude (generally of low magnitude with ML<2.0). Most earthquakes in the White Sea are characterized by a focal depths up to 20 km. Analysis of catalog shows that the majority of earthquakes are concentrated in the north-western part of the defined area, in the continental part of Karelia and Kandalaksha graben. Some earthquakes were recorded in the eastern and central part of the White sea.
Highlights
The White Sea area, which includes the White Sea water area and surrounding areas of the Republic of Karelia, is one of the most fragmented, movable and active regions throughout the entire Eastern European platform
Distinct tracks of paleoearthquakes were encountered in all major parts of the White Sea region in the Kandalaksha, Dvina, and Onega bays, as well as in the Gorlo Belogo Morya area (Nikonov and Shvarev 2013)
The main results of the study consist in creation of an updated catalog and mapping of a modern seismicity according to the Table 1 and Fig. 2
Summary
The White Sea area, which includes the White Sea water area and surrounding areas of the Republic of Karelia, is one of the most fragmented, movable and active regions throughout the entire Eastern European platform. Distinct tracks of paleoearthquakes were encountered in all major parts of the White Sea region in the Kandalaksha, Dvina, and Onega bays, as well as in the Gorlo Belogo Morya area (Nikonov and Shvarev 2013). The data for the historical and instrumental period of observation indicate an increased seismic activity in the western part of the region, especially in the Kandalaksha graben area, the main active structure of the White. 2006) in the 1990s and 2000s, the area of the White Sea has been the highest density of seismometric observations since 2004. Events from the considered region are recorded by stations in Finland, Sweden and Norway and data about them contained in the catalogs of foreign seismological services
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