Research of information attributes of the VLF-range radiochannels for of the earthquakes forecast

In work based on the measuring-receiving complex, a comparative analysis of continuous records for the variation of amplitude of VLF-signals for the 3-rd radio stations results. As a result of observation of VLF-amplitude and their processing 3 possible recurrences of an image of the signal-harbinger were allocated which are observed on the average from 3 minutes to 28 hours before an earthquake. The time of display of the harbingers for earthquakes is more than 20 hours, and the distance between the VLF-link and the epicenter of the forthcoming earthquake is up to 2000 km. For earthquakes with depth more than 150 km the time of detection of the signal of a harbinger less than 12 hours and on distance from the VLF-link more than 4000 km.