"Gunung Sumbing is a prominent 3371-m-high stratovolcano that lies across a 1400-m-high saddle from symmetrical Sundoro volcano in central Java. Prominent flank cones are located on the north and SE sides of Sumbing, which is somewhat more dissected than Sundoro volcano. An 800-m-wide horseshoe-shaped summit crater breached to the NE is partially filled by a lava dome that fed a lava flow down to 2400 m altitude. Emplacement of the dome followed the eruption of extensive pyroclastic flows down the NE flank. The only report of historical activity at Sumbing volcano, in about 1730 AD, may have produced the small phreatic craters found at the summit."  -Smithsonian Volcano Archive
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