The Volcano Observatory Notice to Aviation (VONA) is a notification product used by volcano observatories globally to inform ...
U.S. Geological Survey is designated by the Federal Aviation Administration as the entity to issue Volcano Observatory ...
Spectacular videos show several volcanoes erupting and spewing fiery lava. Guatemala's Volcan de Fuego, meaning volcano of fire, began spouting a constant stream of molten lava on February 23.
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