[Mad Dawg]

How large of an asteroid is needed to make an 18 mile diameter crater (under 12,500 feet of water)? Anyone know?

I would say somewhere between "big mother" and "homper-stomper". Of course, a more careful examination of the data might increase the estimate to "Some KIND of homper-stomper, I tell you WHAT" but we'll just have to wait for more information.

[Mad_Tom_Rackham]

How large of an asteroid is needed to make an 18 mile diameter crater (under 12,500 feet of water)?

About the size of Ted Kennedy or Gerald Nadler traveling under impulse power?