` Insert such values as size, speed, & composition of your very own "world-ender", how far away you'd be from hypothetical point of impact, and prepare for pain !!! Earth Impact Effects Program Mine: Your Inputs: Distance from Impact: 1000.00 km = 621.00 miles Projectile Diameter: 120700.50 m = 395897.64 ft = 74.96 miles Projectile Density: 8000 kg/m3 Impact Velocity: 50.00 km/s = 31.05 miles/s Impact Angle: 75 degrees Target Density: 2750 kg/m3 Target Type: Crystalline Rock Energy: Energy before atmospheric entry: 9.21 x 1027 Joules = 2.20 x 1012 MegaTons TNT The average interval between impacts of this size is longer than the Earth's age. Such impacts could only occur during the accumulation of the Earth, between 4.5 and 4 billion years ago. Major Global Changes: The Earth is not strongly disturbed by the impact and loses negligible mass. The impact does not make a noticeable change in the Earth's rotation period or the tilt of its axis. The impact does not shift the Earth's orbit noticeably. Crater Dimensions: What does this mean? Transient Crater Diameter: 1070 km = 662 miles Transient Crater Depth: 377 km = 234 miles Final Crater Diameter: 2650 km = 1650 miles Final Crater Depth: 3.18 km = 1.97 miles The crater formed is a complex crater. The volume of the target melted or vaporized is 7.91e+07 km3 = 1.9e+07 miles3 Roughly half the melt remains in the crater , where its average thickness is 88.7 km = 55.1 miles Thermal Radiation: What does this mean? Time for maximum radiation: 83.8 seconds after impact Your position is inside the fireball. The fireball appears 935 times larger than the sun Thermal Exposure: 4.29 x 1012 Joules/m2 Duration of Irradiation: 54500 seconds Radiant flux (relative to the sun): 78800 Effects of Thermal Radiation: Clothing ignites Much of the body suffers third degree burns Newspaper ignites Plywood flames Deciduous trees ignite Grass ignites Seismic Effects: What does this mean? The major seismic shaking will arrive at approximately 200 seconds. Richter Scale Magnitude: 12.9 (This is greater than any earthquake in recorded history) Mercalli Scale Intensity at a distance of 1000 km: IX. General panic. Damage considerable in specially designed structures; well-designed frame structures thrown out of plumb. Damage great in substantial buildings, with partial collapse. Buildings shifted off foundations. Serious damage to reservoirs. Underground pipes broken. Conspicuous cracks in ground. In alluviated areas sand and mud ejected, earthquake fountains, sand craters. X. Most masonry and frame structures destroyed with their foundations. Some well-built wooden structures and bridges destroyed. Serious damage to dams, dikes, embankments. Large landslides. Water thrown on banks of canals, rivers, lakes, etc. Sand and mud shifted horizontally on beaches and flat land. Rails bent slightly. Ejecta: What does this mean? The ejecta will arrive approximately 494 seconds after the impact. Your position is beneath the continuous ejecta deposit. Average Ejecta Thickness: 11500 m = 37800 ft Air Blast: What does this mean? The air blast will arrive at approximately 3030 seconds. Peak Overpressure: 2.38e+08 Pa = 2380 bars = 33900 psi Max wind velocity: 12400 m/s = 27800 mph Sound Intensity: 168 dB (Dangerously Loud) Damage Description: Multistory wall-bearing buildings will collapse. Wood frame buildings will almost completely collapse. Multistory steel-framed office-type buildings will suffer extreme frame distortion, incipient collapse. Highway truss bridges will collapse. Highway girder bridges will collapse. Glass windows will shatter. Cars and trucks will be largely displaced and grossly distorted and will require rebuilding before use. Up to 90 percent of trees blown down; remainder stripped of branches and leaves. Yow !!!! :bawl:
Yeah I also like such programmes http://www.users.globalnet.co.uk/~mfogg/simul.htm CO2= 231.3 millibars N2/O2= 50.85 CFC= 0.1 mean global temp -19°C polar min -50°C max trop 6.3°C Okay it's not that much the global pressure would only be 1/5th like on earth But a 1 bar atmosphere on mars would weight 4 x 10-15 tons in this is my inpression of what would happen if a large nitrogen rich asteroid 2X10-13 tons (abouth 1/100 the mass of mars smallest moon deimos). And melts most of the CO2 south pole and some of the permafrost. Please Register or Log in to view the hidden image!
