Exactly what that destruction will look like is still open to debate. Computational physicist Peter Anninos worked with Murray, both of AX division within the Weapons and Complex Integration Directorate, Chris Fragile, at the College of Charleston in South Carolina, and his student, Julia Wilsonboth, to develop six simulations of the disaster.

http://www.huffingtonpost.co.uk/2012/11/12/black-holes-destruction-g2-gas-cloud_n_2116036.html