Possible seismo-ionosphere perturbations revealed by VLF signals collected on ground and on a satellite
The results of the monitoring of three VLF/LF signals collected in Petropavlovsk station (Kamchatka, Russia) and one VLF signal collected on board of the DEMETER French satellite are presented.Two periods of the seismic activity occurred in the Japan-Kamchatka area during November–December 2004 and July–September 2005 were inves