KVERT reported that during 13-14 May a series of explosions at Sheveluch generated ash plumes that rose 4.5-5 km (14,800-16,400 ft) a.s.l.
and drifted SW and SE.
Powerful explosions on 16 May generated ash plumes that rose as high as 11 km (36,100 ft) a.s.l.
and drifted about 150 km ENE.
Pyroclastic flows descended the S flank.
Two explosions were detected on 18 May.
Ash plumes during 16-19 May drifted 400 km ENE.
The Aviation Color Code (ACC) remained at Orange during 13-19 May, except for a few hours on 16 May when the strong explosions prompted KVERT to raise the ACC to Red.
Source: Kamchatkan Volcanic Eruption Response Team (KVERT)