Geophysical Journal | 2005 volume 27 5

Studies of relations of Carpathians seismic activity with phases of 11-year cycle of solar activity and magnetic storms with the sudden beginning

© Kuznetsova V.G., Maksymchuk V.Ye., Ghorodyskiy Yu.M., Nikiforova N.N., Pronyshyn R.S.

Eventual connections between levels of seismic activity in the Vrancea, South Carpathians, (zone V), and in the East Carpathians (zone N) and phases of 11-year cycle of solar and magnetic activity, and also magnetic storms with the sudden beginning have been investigated. Earthquakes of different magnitudes were analyzed within the three time intervals: 1701-2001, 1928-2001 and 1985-2001. More than 85 % of V earthquakes with M>6,7 and N earthquakes with M>4,0 is observed within the limitis of a maximum of 11-years cycle (from -3 up to +3 years from a maximum). Certain confinement of V earthquakes to 11-year maxima has been observed in all the time intervals. Slight increase (of no more than 2 s) in the number of earthquakes in the V zone during the first day and in the N zone during the fifth and seventh days after a magnetic storm with the sudden beginning has been observed. The conclusion about possible existence of the trigger mechanism of influence of phases of 11-year cycle on the levels of seismic activity in the Carpathians and about the need of further investigations in this direction has been made.

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