Shiveluch, one of Kamchatka’s most active volcanoes, erupted early on Tuesday, spewing dust more than 500km (more than 300 miles) northwest and engulfing several villages in grey volcanic dust in the largest fallout in nearly 60 years.
The Kamchatka branch of the Russian Academy of Sciences Geophysical Survey said the eruption continued on Wednesday, spewing clouds of dust 10km (more than six miles) into the sky.
Since the start of the eruption, the area has been closed to aircraft and residents have been advised to stay indoors.
The villages located about 50km (some 30 miles) from the volcano, were covered by a 20-centimetre (nearly eight-inch) layer of dust. Residents posted videos showing the ash cloud plunging the area into darkness.
Shiveluch has two parts — the 3,283-metre (10,771-foot) Old Shiveluch, and the smaller, highly active Young Shiveluch.
The Kamchatka Peninsula, which extends into the Pacific Ocean about 6,600km (4,000 miles) east of Moscow, is one of the world’s most concentrated areas of geothermal activity, with about 30 active volcanoes.