The article provides macroseismic data on the earthquake 20.05.2014 18h26mUTC ML=2.8, that had a local but relatively strong macroseismic effect (I0=4–5) in the Chishminsky district of the Republic of Bashkortostan. After the event, macroseismic data were collected in 27 settlements in the epicentral zone. This data allowed to determine the macroseismic epicenter, which is close to the instrumental one. The events in the same area during the historical period were considered in detail and modern seismic records were revised. The data allowed to identify a series of similar seismic events with less magnitudes in 2014. The classification of these activities into two groups has been justified there. There are tectonic and natural events induced by Alkinskoye oil deposit exploration.
Instrumental and macroseismic data on the earthquake of 18.10.2015 at 21h44m UTC, ML=4.7, I0=6 in the Sverdlovsk region, near the village of Sabik (Middle Urals) are presented. A significant amount of macroseismic data made it possible to build a map of the macroseismic field, taking into account the anisotropic nature of the propagation of the seismic effect. Taking into account the decision of the focal mechanism, the tectonic position of the source was substantiated.
The article summarizes information about seismic network in the Urals and Western Siberia region, describes processing technique, presents a short analysis of the seismic activity in 2015. Seismic network capability is shown for the whole territory under control. It was found that about 82 % of registered events are explosions in mines and open pits, 37 events are natural or induced ones. For the strongest induced events, variants of source parameters obtained by different agencies are shown. The strongest tectonic event in 2015 and for the last century (after 1914) is the Middle Ural earthquake with ML=4.7, I0=6 that occurred on October 18, 2015.
The article summarizes information about seismic network in the Urals and Western Siberia region, describes processing technique, presents short analysis of seismic activity for 2016–2017. Seismic network capability is shown for whole territory under control. It was found that about 84 % of registered events are explosions in mines and open pits, 89 events are natural or induced ones. For the strongest induced events, variants of source parameters obtained by different agencies are shown.
Ruslan A. Dyagilev, Natalia S. Guseva, Filipp G. Verkholantsev report on macroseismic field anisotropy of a rare ML 4.7 tectonic event in the Ural Mountains on 18 October 2015. This publication is an English adaption of an article that was first published in Russian in the Russian Geophysics Journal (2016, Vol. 5, pp. 42–46).
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