On the relation between geomagnetic pulsations and earthquakes

Abnormal changes in the mode of Pc1 geomagnetic pulsations (pearls) were revealed during earthquakes. The changes can be observed after the occurrence of ULF electromagnetic pulses associated with earthquakes. Various examples of such changes in pulsations are analyzed using data from the observatories Borok and College. A possible mechanism of the seismic activity effect on the oscillation mode is discussed