Krakatoa is the name of a volcano that erupted in the Pacific, and was heard all
over the world.  It was pretty messy, too.  Beautiful sunsets. Nothing to do with
cropcircles?  I'm not so sure.   LPK
Krakatoa
Here is also an interesting 3D cropcircle image to look
at.  It has been suggested that focusing on SIS images
is good eye exercise.