Hi Mitchell,
Its fiction. but if you must know the 'commit' was blown up. However a large fragment smacked into the Atlantic. 1000Mph tsunami climbing to 3500ft destroyed all on the East coast USA. Waters were to reach 600 miles inland.
What the writers neglected was: with such forces active people would be killed by the shock wave advancing in front of the tsunami.
Oh! Bug... er it. Its only fiction. I rate it as watchable on a cloudy night.
Cheers