© N. M. Kravchenko

Kamchatkan Branch of Geophysical Service, RAS, Petropavlovsk-Kamchatsky, 683006

A technique for calculating a predictive parameter RTL proposed by Sobolev G.A. and Tyupkin Yu.S. (1996) was used for investigating variations of weak seismicity in Kamchatka for the period of time from 1980 to 2004. The analysis has been done for two depth ranges: 0-70 km and 30-100 km. It was found that in 7 cases from 9 for the depth range 0-70 km and in 10 cases from 16 for the depth range 30-100 km within the limits of area of abnormal reduction of values RTL or in its nearest vicinities in an interval till 2 years after achievement of a minimum RTL occured earthquake of Mі6.