Physics of Auroral Phenomena

Abstract

Abstract Spectral and polarization parameters of the natural ULF/ELF signal in a seismic region (Kamchatka, Russia) are statistically analyzed and a meaningful change in the signal polarization is found to occur several days prior powerful earthquakes (EQ). This effect can be caused by an extended thunderstorm activity in the EQ preparation zone due to either aerosol and gas emissions by an active fault or by the modification of the ionosphere by the preseismic AGW waves