Statistical relationship of strong earthquakes with planetary geomagnetic field activity

Physics

Scientific paper

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Earthquakes, Geomagnetism, Kp Index, Planetary Magnetic Fields, Statistical Correlation

Scientific paper

Earlier studies reported a significant decrease in the geomagnetic field before strong earthquakes. Possible relationships between earthquakes with magnitude greater than 7 (Soviet scale) and planetary terrestrial magnetic field activity as characterized by the K sub p index were investigated. A total of 100 cases of strong earthquakes on magnetically quiet days in 1965 to 1975 were studied. The K sub p indexes were studied for two days before and two days after the earthquakes. The dispersion curve shows a significant decrease one day before each event. The relationship of the planetary K sub p index with seismic activity indicates that the period of preparation for an earthquake and at the moment of the shock are reflected in the terrestrial magnetic field.

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