The Volcano Adventure Guide: Excellent information and background for anyone wishing to visit active volcanoes safely and enjoyably. The book presents guidelines to visiting 42 different volcanoes around the world.
The "lava fountains", visually more similar to strombolian explosions, erupt from at least 2 different vents in the summit crater. This one ejects bombs to at least 2-300 m height. (Photo: Tom Pfeiffer)
Blue flames of burning sulfur: Ijen volcano in East Java has one of the most impressive sulfur deposits on earth. They are so hot that the sulfur often ignites - a mysterious display at night caught on camera.
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