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Bezymianny, Kamchatka, Russia
February 24, 1999
A large explosion occurred
at Bezymianny early in the morning of February 24. This explosion lasted
about two minutes and was followed about a half hour later by an explosion
lasting 3-4 minutes. A gas and ash plume rose to about 5 miles (~8 km)
above the volcano. This plume stretched over 75 miles (~115 km) to the
southeast. Enough material was ejected into the air to pose a serious
threat to airline traffic that flies over the region.
December 5, 1997
An explosive eruption at
Bezymianny volcano began on December 5. The eruption plume from this event
was estimated to reach 30,000 ft (9 km) high. The ash cloud stretched
for 150 miles (250 km) to the east.
May 8, 1997
Bezymianny began showing
signs of renewed activity on May 3, 1997. Early on the morning of May
8, an ash plume was observed rising to a height of about 13,000 feet (4,000
m). By early afternoon, the strength of the eruption had increased and
the ash plume reached heights of 40,000-45,000 feet (12,000-14,000 m).
Seismic tremor was continuous. Two vents may have been active by late
afternoon. The eruption plume extended 260 miles to the east-northeast.
Information supplied by: http://volcano.und.nodak.edu