Hyperbolide

2013 April 1, Richard Miles, "2013 February 15: the day of the asteroids!," at thefreelibrary.com This 'hyperbolide' may have been the most energetic such event known since that 1908 explosion, the latter having devastated more than two thousand square kilometres of Siberian forest.

2004 May 4, "Could a nuke make Yellowstone Caldera erupt?), " at ask.metafilter.com When I was a geology student in Bozeman there was a good deal of talk about setting off the Yellowstone hotspot by pumping beer (undergrads!) into the substrate resulting in an increase in pore pressure and a corresponding increase in seismic activity. Good times. Also, Alt and Hyndeman, IIRC, at UM--Missoula did some work on hyperbolide impact volcanism or terrestrial maria.

It is shown, in conclusion, that with the Cassegrain telescope the best definition is obtainable when the form of the primary mirror is a paraboloide, and that of the secondary a hyperbolide; that deviations from these forms in the two surfaces when acting in combination, will generally tend to compensate each other, and will be entirely neutralized when the amount of error in the convex mirror is double that of the concave mirror.