Which volcanic complex in East Java is globally famous for its intensely acidic turquoise crater lake and nocturnal electric-blue sulfur fires?
Answer and explanation
Correct answer: D. Ijen Volcano Complex
- Step 1: Kawah Ijen features a highly acidic turquoise crater lake (pH < 0.5) and rich solfataric sulfur deposits. Step 2. Ignited sulfuric gases emerging from fumaroles at temperatures up to 600 °C produce spectacular blue flames visible only at night. Answer: Ijen Volcano Complex. Why not the others: Dieng Plateau has bubbling mud pools; Kelimutu has tri-colored crater lakes.
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