How far would 2km high wave go inland?

Answer 1

I read the one in Indonesia got up to 30 meters high and went as far as 3km inland. this means for every 10 meters in height the wave can travel 1km inland.

Using the above formula, a 2km high wave (2000 meters), could travel 200km inland (2000/10=200).

This may be incorrect tho as the waves energy may grow exponentially with height. If this is true it could travel a LOT further inland.

Obviously terrain height and natural geographical resistances such as, hills, valleys, forests etc. will use up more of the waves energy and shorten the distance it can travel.

In Conclusion:

If you were 300km inland and there was a mountain range in between you and the ocean you should be 99.99% safe :)

Keep in mind you also need to make sure your not near a fault line or extinct volcano if 2012 becomes real.