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.
Harra of Bal Haf volcano is a small volcanic field about 100 km SW of the city of Al Mukalla in southern Yemen along the along the coast of the Gulf of Aden.
At least one basaltic lava flow is probably of historical age.
Bromo volcano photos: Bromo is one of Indonesia's most visited volcanoes. It is the most active vent inside the huge Tengger caldera and erupts every few years.
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