Characterizing the foreshock, main shock, and aftershock sequences of the recent major earthquakes in Alaska

Major earthquakes of M ≥7 are complex. The geometry, timing, and slip distribution of the complex nonlinear system of the lithospheric blocks-and-faults involved is usually not well resolved. Their rupture may propagate both upward into the crust and downward into the mantle. As a result, the expected ground shaking could be…

Condition of occurrence of large man-made earthquakes in the zone of oil production, Oklahoma

Man-made seismicity is a response of the brittle crust to fluid injection at depth and to the subsequent increase in pore-pressure and stress field perturbations. In Oklahoma, where the sharp increase in earthquake rate correlates with injection operations, we show that the earthquake-size distribution can differ significantly on the volume of…

Granites-rapakivi – cultural monuments and reservoirs of hydrocarbons – mechanisms of destruction

Rapakivi in Finnish means «rotten stone». These very beautiful granites, widely used in construction as facing material, are often represented in nature by granular-block-destroyed massifs, and often destruction is observed only in the near-surface region. Over time, architectural structures made from rapakivi also tend to crack and collapse. Among other things,…

A boundary value problem in the theory of elasticity for a rectangle: exact solutions

In the journal “Zeitschrift für angewandte Mathematik und Physik” (WoS, Scopus, Q1) publishedby Springer, the article“A boundary value problem in the theory of elasticity for a rectangle: exact solutions” was published. Among the authorsareemployees of IEPT RAS: Leading Researcher, D.Sc. (Phys.-Math.) M.D. Kovalenko, Senior Researcher, Cand. Sc. (Phys.-Math.) I.V. MenshovaandSenior Researcher,…

Geodynamics, seismicity and seismic hazard of the Caucasus

To understand how geodynamic processes affect seismicity and what danger earthquakes pose in the Caucasus, a group of scientists from Russia, Azerbaijan, Armenia, Georgia, Germany, the Netherlands, the United States, and Switzerland conducted a study analyzing a large number of works on geology, geotectonics, geodesy, gravics, seismicity, seismic tomography, heat flow,…