|Large extrusive dome, consisting of three large blocks, separated by depressions. In all likelihood, all the blocks were formed as a result of one, but rather prolonged eruption. At the top of the western, largest block, there are two merged explosive funnels forming a latitudinal moat open to the east. On the northern slope is another, less high dome. On the border of this dome with a slope there is a nest of powerful solfatars. The agglomerate mantle of the domes almost everywhere drops to the foot, forming as a whole in plan a slightly elongated in the meridional direction oval 1.1 x 1.7 km in size. In some places, short, steep tongues of lava flows protrude from below the agglomerate mantle, indicating that the dome grew in the crater of an older central cone. In the northern part, flows reach the caldera wall, and in the south, older streams go down several kilometers. One of them has a length of 6 km and reaches the coast of the ocean, forming a large Cape Dragon with a width of about 1.5 km and a height of 30-50 m [Горшков, 1967].
Горшков Г.С. Вулканизм Курильской островной дуги / Отв. ред. Рудич К.Н. 1967. 288 с.
Горшков Г.С. Каталог действующих вулканов Курильских островов // Бюллетень вулканологических станций. 1957. № 25. С. 96-178.