Indonesian “Volnado” erupting and spawning tornados.

The pyroclastic flow deposits red-hot material on the slope of the volcano. After a few minutes, air heated by the deposit establishes a convective regime and due to the speed of the rising air a series of small tornados (also spelled tornadoes) are formed.

During daylight it is difficult to imaging how hot the deposit is. To see a pyroclastic flow deposit glowing at night from same location as present video one can view:

Note: Video is played at 2x normal speed as flow is actually not very fast and video would otherwise be too long for most viewers.



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