BORIS GRIGORYEVICH BUKCHIN PASSED AWAY

We are deeply saddened to announce that on April 15, 2022, Boris Grigoryevich Bukchin passed away.

He was a famous seismologist, a wonderful, kind, intimate person.

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The Variability of Earthquake Parameters with the Depth: Evidences of Difference of Mechanisms of Generation of the Shallow, Intermediate-Depth, and the Deep Earthquakes

At the high pressures and temperatures typical of the Earth’s interior, the brittle failure in accordance with the generally accepted Reid elastic rebound model cannot occur at depths greater than a few dozen kilometers. Nevertheless, earthquakes do occur at depths to about 700 km depth and some more.

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Identifying Potential Earthquake Sources in Continental Environments

In this paper, we outline the overview of the problem of intraplate seismicity and summarize our studies aimed at identifying potential earthquake sources in three regions located in the continental environments. We study the French Massif Central located within the West-European platform, the Gujarat area situated at the northwestern edge of the Indian shield, and northeast Egypt located in the northeastern corner of the African continent.

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Late Glacial and postglacial seismicity in the Northeastern Fennoscandian Shield: tectonic position and age of paleo-earthquakes near Murmansk

The results of paleoseismological studies in the area south of the city of Murmansk are discussed. As the main seismogenic zone, a system of strike-slip and reversefaults of the NNW strike along the Kola rivervalley is identified here. Radiocarbon dating identified three episodes of high seismic activity: from 9500 to 10500 years ago, from 892 to 1182 and about 300 years ago.

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