Quote:
Originally Posted by ArmySGT.
Who has their 4th Edition handy?
What is the mass, velocity, and descent angle of the meteor impacts in the Pacific ocean in 4th edition?
I would like to plug them into this to calculate the Tsunami effects on the U.S. West Coast.
http://impact.ese.ic.ac.uk/ImpactEffects/ |
Sadly they do not provide information that specific. All we know about 2016 E3 is that is was over 5km in diameter and the resulting impact was 10 million megaton. The location is "northern Pacific". I use Impact! at
http://www.purdue.edu/impactearth/ for my calculation. If we assume it was dense rock, a 45° impact at 35 km/s with water depth of 3000m results in a 28.7 million megaton impact. So our asteroid is either less dense or slower. For the sake of simplicity, we will assume that it is dense rock since in the documentary Armageddon it was difficult to drill. Using all the same parameters for everything else and setting velocity to 20km/s gives energy of 9.38 million megatons. One more time at 21 km/s gives 10.3 million megatons. Close enough.
The effects from this impact are significant. The first effect is a thermal wave causing massive third degree burns and lighting most light wood on fire. Next comes the 9.1 earthquake. This is followed by a rain of ejecta that will end up about 38 ft deep with average particle size of 14 inches. Then come the arblast, providing a peak 570 psi overpressure. Finally the tsunami arrives, with a height between 975 and 1950m. Being this close to the impact pretty much makes this portion of the west coast a dead zone.