Flaming molten sulfur flows inside the volcanic crater. Sulfur will melt at just above 100 C (212 F), but the temperatures in the crater do not get high enough for spontaneous combustion - the fires are lit by the miner’s dripping torches. (© Olivier Grunewald)
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Flaming molten sulfur flows inside the volcanic crater. Sulfur will melt at just above 100 C (212 F), but the temperatures in the crater do not get high enough for spontaneous combustion - the fires are lit by the miner’s dripping torches. (© Olivier Grunewald)