The lava flow features are well conserved and there is little turf on the lava flows. Reports exist of volcanic activity in the 14th and the 18th century. This makes Anyuyskiy one of the few volcanoes in continental Asia outside of Kamchatka with historical activity. The fissure-forming eruption is likewise recent and probably occurred after the ice ages. It may have been seen by local people, leading to legends about places where hunting is banned and where smoke and fire comes out of the ground. Potassium-argon dating has yielded ages of 248,000 ± 30,000 years ago. Likewise, later evidence indicated that the volcano had interacted with glaciers and glacial meltwater, degrading its structure.