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Impact Simulator said:"Humpback Whale - 13.7 m"
I, naturally, being a man's man put a moon-sized object with an iron core striking the Earth at a 90 degree angle at 72 km/sec. The distance from impact was 6,000 km away, but the report of the explosion was still 'dangerously loud' at 192 dB, with an overpressure wave of 56,000 PSI (moving air at 192,000 miles per hour). Not a good day for the dinosaurs.
So as long as it doesn't impact on land Apophis is really boring...
(unless you compare it to Scav's disaster. )
So you basically created a new asteroid belt?
I tried to simulate Apophis with its diameter of 270 meter, density of 3200 kg/m³, the angle is of course unsure, so I made it 60° (the 2029 kinda looks like that in the charts, dunno about 2036), velocity of 12 km/s and then the guessing started, there's a possible impact map on wikipedia, so I nailed Apophis into the North Pacific's 5400 meter deep water, 1800 kilometers away from Anchorage, my observing point.
I end up with 528 megatons :blink:, but due to its hit in the water there's basically no crater, no ejecta, an 0.9 earthquake (happens everyday in California), 48 dB of sound (conversation-like) and basically no tsunami at all (less than 1.22 meters).
So as long as it doesn't impact on land Apophis is really boring...
10 times the energy of the most powerful nuclear weapon ever set off on the face of the Earth is boring to you?
There's more than that... the splash the impact causes would throw water tens of kilometers in the air and as they fall back down, they'd cause another wave and that would continue for several cycles.