The diminishing effects of terrestrial impacts over distance The fireball is below the horizon. There is no direct thermal radiation. projectile diameter projectile density impact velocity impact angle target density target type
2300m 2700kg/m^3 20 km/s 45 deg 2500 km/s sedimentary rock
distance from impact (km) thermal exposure (Joules/m2) 0 n/a 100 5.76 x 107 200 1.04 x 107 300 1.94 x 106 400 no direct thermal radiation 500 no direct thermal radiation 600 no direct thermal radiation 700 no direct thermal radiation 800 no direct thermal radiation 900 no direct thermal radiation 1000 no direct thermal radiation 1100 no direct thermal radiation 1200 no direct thermal radiation 1300 no direct thermal radiation 1400 no direct thermal radiation
9
wind velocity (m/s) n/a 303 105 54.3 34.5 24.6 18.9 15.2 12.7 10.9 9.48 8.41 7.55 6.84 6.26