PETROPAVLOSK, Russia, Dec. 28 (UPI) -- Russian seismologists said the Shiveluch volcano in the eastern Kamchatka peninsula began erupting Tuesday, sending hot ash up to 6,500 feet.
Seismic stations near the volcano registered underground tremors from a depth of up to 16,000 feet with spasmodic volcanic vibration, the Novosti news agency reported.
Scientists said it was impossible to conduct video observation of Shiveluch because of bad weather.
The 10,700-foot mountain first became active last May 10, sending up an ash plume more than 30,000 feet and triggering lava-ridden fragmentation avalanches. At that time, government officials closed the area to everyone but scientists.
The report said the main concern Tuesday was the threat to aviation, as the dense ash clouds can paralyze aircraft engines.
