I honestly don't know where to put this but I found a neat little app called Impact Earth.
You can change the angle and size and then see the destruction reports after.
I warn you it is not great however and the results seem odd sometimes.
pretty cool....however the data i put in....when i went to siesmic it says a 10'5 earthquake wud happen and its the largest ever earthquake known to
man...and in the box below it says dishes will rattle and pendulum clocks may stop..lol er yea? perhaps my whole building will collapse!!?..no?