"The gently sloping, 1220-m-high Berutarubesan stratovolcano forms the SW tip of Iturup Island. The flanks of the andesitic-to-dacitic volcano are deeply dissected by wide glacial valleys; a low saddle on the NE side separates it from the slopes of the Lvinaya Past caldera. The only known Holocene activity produced a small pyroclastic cone that was superposed on the intersecting headwalls of U-shaped valleys and cirques on the volcano's broad eroded summit. The hydrothermally altered summit cone was the source of two small lava flows. Berutarubesan was estimated to have ceased erupting only a few hundred to at most 1000 years ago (Gorshkov, 1970). No confirmed historical eruptions are known, although fumarolic areas on the walls of the summit crater are currently depositing sulfur."  -Smithsonian Volcano Archive
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