PETROPAVLOVSK-KAMCHATSKY. April 8. VOSTOK MEDIA – Four volcanoes of Kamchatka – Gorely, Mutnovsky, Karymsky and Shiveluch – have simultaneously started eruption. Hundreds of separate shocks were detected in the volcanic area. The Kamchatka Branch of the Russian Academy of Sciences Geophysical Service told Vostok Media, weak eruptions and pyroclastic flows (a mix of hot gas and rock) are being seen on the slopes. Scientists consider the increase of eruptions possible especially in view of high activity of Shiveluch – the most active volcano in recent years.