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So, here is Phobos standing over my town Grenoble in the Alpes (eastern France). Phobos' dimensions are 26,8 x 18,4 km. If you carefully look at the center of the picture, you'll see 2 helicopters, still quite far from the "big rock".
Originally posted by AaronWilson
Would that be a MEV? Or just kill alot on that particular continent?
I wonder how many megatons of explosive energy would be released by that impact? But would need to know impact veleocity.
Originally posted by cranspace
If you look carefully at the centre of the image you can see two helicopters its hard to make out but i think they are the two white dots under the dark crater
Originally posted by Phage
reply to post by AaronWilson
I wonder how many megatons of explosive energy would be released by that impact
I think you've moved into the realm of teratons.
Projectile diameter: 22.20 km ( = 13.80 miles )
Projectile Density: 1876 kg/m3
Impact Velocity: 24.00 km per second ( = 14.90 miles per second )
Impact Angle: 45 degrees
Target Density: 2500 kg/m3
Target Type: Sedimentary Rock
Energy before atmospheric entry: 3.10 x 10,000,000,000,000,000,000,000,000 Joules = 7.39 x 1,000,000,000 MegaTons TNT
The average interval between impacts of this size somewhere on Earth during the last 4 billion years is 7.4 x 1,000,000,000years