Anyuyskiy (Russian: Анюйский Вулкан; Annuyskiy Vulkan)[2] is an extinct volcano in the Anyuy Mountains, Chukotka Autonomous Okrug, Far Eastern Russia.

Later, a volcanic cone formed, experiencing explosive activity and eventually extruding a long lava flow.

It was considered to have been active during the 14th and 18th centuries, but radiometric dating has shown ages of almost 250,000 years ago.

[3] Anyuyskiy is in the valley of the Monni River, in the southern Anyuy Mountains, part of the East Siberian System.

This volcanic activity filled the valley of the Monni River and disrupted the course of its tributaries, resulting in the formation of a number of lakes.

[1] It formed over a granitoid intrusion, in the headwaters of one of the rivers that feed the Monni,[4] on the slopes of the 1,585-metre-high (5,200 ft) mountain Vulcannaya.

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.

[1] Likewise, later evidence indicated that the volcano had interacted with glaciers and glacial meltwater, degrading its structure.