What is the explosion of a black hole called?

Answer 1

I don't know of any specific term used to refer to a black hole explosion.

Note: The concept of an exploding black hole is still hypothetical. In 1974, Stephen Hawking realized that, owing to quantum effects, black holes should emit particles with a thermal distribution of energies - as if the black hole had a temperature inversely proportional to its mass. In addition to putting black-hole thermodynamics on a firmer footing, this discovery led Hawking to postulate 'black hole explosions', as primordial black holes end their lives in an accelerating release of energy. However, these explosion merely describe a marked increase (or burst of energy) in the emission of Hawking radiation; and the speed of such evaporation is still very theoretical.

The final stage of the evaporation for a black hole has been described to proceed so rapidly that it would end in a tremendous explosion. How powerful this explosion would be depends on how many different species of elementary particles there are. If, as is now widely believed, all particles are made up of perhaps six different kinds of quarks, the final explosion would have an energy equivalent to about 10 million one-megaton hydrogen bombs.

On the other hand, an alternative theory of elementary particles put forward by R. Hagedorn of the European Organization for Nuclear Research argues that there is an infinite number of elementary particles of higher and higher mass. As a black hole got smaller and hotter, it would emit a larger and larger number of different species of particles and would produce an explosion perhaps 100,000 times more powerful than the one calculated on the quark hypothesis. Hence the observation of a blackhole explosion would provide very important information on elementary particle physics, information that might not be available any other way.

Answer 2

I don't think there is a special name for that.