5/26/2023 0 Comments Base of mt sumaru indivisible![]() Frequent 19th and 20th century eruptions were dominated by small-to-moderate explosions from the summit crater, with occasional lava flows and larger explosive eruptions accompanied by pyroclastic flows that have reached the lower flanks of the volcano. Summit topography is complicated by the shifting of craters from NW to SE. A line of lake-filled maars was constructed along a N-S trend cutting through the summit, and cinder cones and lava domes occupy the eastern and NE flanks. Gunung Semeru was constructed south of the overlapping Ajek-ajek and Jambangan calderas. The steep-sided volcano, also referred to as Mahameru (Great Mountain), rises abruptly to 3676 m above coastal plains to the south. Semeru, the highest volcano on Java, and one of its most active, lies at the southern end of a volcanic massif extending north to the Tengger caldera. Photo and caption credit: Campbell Bridge (via Trek Earth at: ) The many spectacles presented by the landscapes, the festivals and the people of Indonesia never cease to truly amaze me. The photo typifies the fact that Indonesia sits in the middle of the "Ring of Fire". The most striking aspect of the photo is the colour caused by the almost perpendicular rays of the sun hitting the cloud of dust and steam escaping a couple of thousand metres into the sky from the crater. The photo was taken in late afternoon (August 2003) and simply involved walking from the campsite at the base of the climb to the summit around to the west so that the sun was at my back, then waiting for the eruption to start. ![]() The mountain stages minor eruptions (like in the photograph) every 20 - 40 minutes. The climb to the summit of Semeru is a 2-3 day walk.
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