Home – Home – Jornals – Russian Geology and Geophysics 2001 number 10

On the basis of harmonic analysis of the data for 125 thousand earthquakes from the catalog of the National Earthquake Information Center of the U.S. Geological Survey for the period 1964-90 and of a series of time-dependent changes of the Earth's angular velocity (t) during the same period, significant positive correlation has been established between graphs of |d/dt| and (t), an annual number N(t) of earthquakes for different regions of the Earth averaged over several years depending on their hypocenter depths (so-called T-component of seismic activity). Besides, special attention was paid to studies of spreading and subduction zones. At the same time, in any two adjacent areas along the both sides of the tectonic plate (in subduction zones and in the system of mid-ocean ridges and continental mountain ranges) the correlation coefficient between the functions [N₁(t)