Russian volcano erupts sending ash four kilometres high

From BBC: 

A volcano in Russia has begun erupting, spurting ash up to four kilometres into the sky.

Aircraft have been warned against flying in the area around the Kizimen volcano on the Kamchatka Peninsula because of the threat posed to engines by the particles of volcanic ash.

Simon McCoy explains.

A volcano in Russia has begun erupting, spurting ash up to four kilometres into the sky.

Aircraft have been warned against flying in the area around the Kizimen volcano on the Kamchatka Peninsula because of the threat posed to engines by the particles of volcanic ash.