V. A. Droznin1, D. V. Droznin2

1 Institute of Volcanology and Seismology FEB RAS, Petropavlovsk – Kamchatsky, 683006; e-mail: dva@kscnet.ru
2 Kamchatkan Branch Geophysical Survey RAS, Petropavlovsk- Kamchatsky, 683006

The eruption on May 9, 2006 at Bezymianny provided a phase of decompression that produced steam and ash plumes later resulted in an explosion. The second phase of the proper eruption formed the eruptive column and pyroclastic flow.