Sheveluch Volcano. Monitoring
Aviation Color Code:
ORANGE 
Current State: The explosive-extrusive eruption of the volcano continues, accompanied by powerful gas-steam activity. Satellite data by KVERT showed: on 05-08 February, explosions sent ash up to 11.6 km a.s.l.; and ash plumes and clouds moved for 1000 km to the west and northwest of the volcano; a thermal anomaly on the volcano on 07-08, and 10-11 February, the volcano was obscured by clouds in the other days of the week. 
Danger Prognosis for Aviation: The explosive-extrusive eruption of the volcano continues. Ash explosions up to 12 km (39,400 ft) a.s.l. could occur at any time. Ongoing activity could affect international and low-flying aircraft.