Chaosbutterfly

Impact Effects
Robert Marcus, H. Jay Melosh, and Gareth Collins

Your Inputs:
Distance from Impact: 161.00 km = 99.98 miles Projectile Diameter: 8046.70 m = 26393.18 ft = 5.00 miles Projectile Density: 1000 kg/m3 Impact Velocity: 51.00 km/s = 31.67 miles/s Impact Angle: 70 degrees Target Density: 1000 kg/m3 Target Type: Competent Rock or saturated soil

Energy:
3.55 x 1023 Joules = 8.48 x 107 MegaTons TNTThe average interval between impacts of this size somewhere on Earth is 1.4 x 108years

Crater Size:

Transient Crater Diameter: 90.28 km = 56.06 miles Final Crater Diameter: 163.05 km = 101.26 miles
The crater formed is a complex crater.
Thermal Radiation:

Time for maximum radiation: 2.78 seconds after impact
Visible fireball radius: 139.6 km = 86.7 miles The fireball appears 197.0 times larger than the sunThermal Exposure: 6.42 x 108 Joules/m2Duration of Irradiation: 184 secondsRadiant flux (relative to the sun): 3486.8
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:

The major seismic shaking will arrive at approximately 32.2 seconds.Richter Scale Magnitude: 9.9 (This is greater than any shaking in recorded history)Mercalli Scale Intensity at a distance of 161 km:

IX. General panic. Masonry D destroyed; masonry C heavily damaged, sometimes with complete collapse; masonry B seriously damaged. (General damage to foundations) Frame structures, if not bolted, shifted off foundations. Frames racked. 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.

Masonry B. Good workmanship and mortar; reinforced, but not designed in detail to resist lateral forces.
Masonry C. Ordinary workmanship and mortar; no extreme weaknesses like failing to tie in at corners, but neither reinforced nor designed against horizontal forces.
Masonry D. Weak materials, such as adobe; poor mortar; low standards of workmanship; weak horizontally.

Ejecta:

The ejecta will arrive approximately 184.0 seconds after the impact.Your position is in the region which collapses into the final crater.Your position is beneath the continuous ejecta deposit.Average Ejecta Thickness: 165.8 m = 543.99 ft

Air Blast:

The air blast will arrive at approximately 536.7 seconds.Peak Overpressure: 2593656.5 Pa = 25.9366 bars = 368.2992 psiMax wind velocity: 1153.1 m/s = 2579.4 mphSound Intensity: 128 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.

Earth Impact Effects Program Copyright 2004, Robert Marcus, H.J. Melosh, and G.S. Collins
These results come with ABSOLUTELY NO WARRANTY

http://www.lpl.arizona.edu/impacteffects/