Actually:
Your Inputs:
Distance from Impact:
8500.00 km = 5278.50 miles
Projectile Diameter:
2000000.00 m = 6560000.00 ft = 1242.00 miles
Projectile Density:
3000 kg/m³
Impact Velocity:
18.00 km/s = 11.18 miles/s
Impact Angle:
90 degrees
Target Density:
1000 kg/m³
Target Type: Liquid Water of depth 1500.00 meters, over typical rock.
Energy:
Energy before atmospheric entry:
2.04 x 10^30 Joules =
4.86 x 10^14 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.
1.65 percent of the Earth is melted
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?
The crater opened in the water has a diameter of
7300 km = 4530 miles
For the crater formed in the seafloor:
Transient Crater Diameter:
4460 km = 2770 miles
Transient Crater Depth:
1580 km = 979 miles
Final Crater Diameter:
13400 km = 8300 miles
Final Crater Depth:
5.17 km = 3.21 miles
The final crater is replaced by a large, circular melt province.
The volume of the target melted or vaporized is 1.81e+10 km³ = 4.34e+09 miles³
Melt volume = 1.56 times the crater volume
At this size, the crater forms in its own melt pool.
Thermal Radiation:
What does this mean?
Time for maximum radiation:
1410 seconds after impact
Your position is inside the fireball.
The fireball appears
547 times larger than the sun
Thermal Exposure:
1.02 x 1013 Joules/m²
Duration of Irradiation:
329000 seconds
Radiant flux (relative to the sun):
30900
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
1700 seconds.
Richter Scale Magnitude:
14.4 (This is greater than any earthquake in recorded history)
Mercalli Scale Intensity at a distance of 8500 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
2870 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:
5750 m = 18800 ft
Air Blast:
What does this mean?
The air blast will arrive at approximately
25800 seconds.
Peak Overpressure:
1.09e+08 Pa = 1090 bars = 15500 psi
Max wind velocity:
8410 m/s = 18800 mph
Sound Intensity:
161 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.
Tell me more...
Click here for a pdf document that details the observations, assumptions, and equations upon which this program is based. It describes our approach to quantifying the important impact processes that might affect the people, buildings, and landscape in the vicinity of an impact event and discusses the uncertainty in our predictions. The processes included are: atmospheric entry, impact crater formation, fireball expansion and thermal radiation, ejecta deposition, seismic shaking, and the propagation of the atmospheric blast wave.
Look who's laughing now.
