For ASU rewrites or just out of curiosity, the site
Impact: Earth! is an online calculator for cratering effects of hypothetical asteroid impacts. Now you don't need NASA to tell you what wait for if an asteroid is in route of collision. :p
You can choose size, speed, kind of material, angle, etc. and the site will give you information about crater dimensions, thermal radiation, global damages, seismic effects, tsunamis and more. Very detailed informations. Just toss your asteroid and see what it can do.
Andreia
