From November 2003 to January 2004, the first manifestations of magma upwelling were recorded. After another relatively calm year,an eruption of the Strombolian type occurred after 20.01.2005 and continued for almost half a year. Almost simultaneously, a strong eruption occurred in the Bezymianny volcano [Sobolevskaya and Senyukov, 2008]. Thus, the year 2004,which was the preparative stage for the eruptions after a silent period, is a time of special interest and was selected for this study.