Thanks for the link, that site is great to play the “what if” game.
For those that have not played with the sim itself, here is one example simulation I ran:
Asteroid of Nickel and Iron
Approximately 1 mile across
Traveling at 25km/s
Lands off the coast of California in 1000m of water
Enters at a 60 degree angle
Results to someone a full 300 miles away:
Energy before atmospheric entry: 4.42 x 10^24 Joules = 1.06 x 10^9 MegaTons TNT
Depending on the direction and location of impact, the collision may cause a change in the length of the day of up to 13.8 milliseconds.
The crater opened in the water has a diameter of 245 km ( = 152 miles ).
For the crater formed in the seafloor:
Transient Crater Diameter: 149 km ( = 92.6 miles )
Transient Crater Depth: 52.7 km ( = 32.7 miles )
Final Crater Diameter: 287 km ( = 178 miles )
Final Crater Depth: 1.63 km ( = 1.01 miles )
The crater formed is a complex crater.
The volume of the target melted or vaporized is 33200 km^3 ( = 7960 miles^3 )
Roughly half the melt remains in the crater, where its average thickness is 1.9 km ( = 1.18 miles ).
Time for maximum radiation: 13.1 seconds after impact
Visible fireball radius: 310 km ( = 192 miles )
The fireball appears 146 times larger than the sun
Thermal Exposure: 8.4 x 10^9 Joules/m^2
Duration of Irradiation: 1.18 hours
Radiant flux (relative to the sun): 1970
Effects of Thermal Radiation:
Clothing ignites.
Much of the body suffers third degree burns.
Newspaper ignites.
Plywood flames.
Deciduous trees ignite.
Grass ignites.
The major seismic shaking will arrive approximately 1.61 minutes after impact.
Richter Scale Magnitude: 10.6 (This is greater than any earthquake in recorded history)
Mercalli Scale Intensity at a distance of 483 km:
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.
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.
The air blast will arrive approximately 24.4 minutes after impact.
Peak Overpressure: 3730000 Pa = 37.3 bars = 530 psi
Max wind velocity: 1530 m/s = 3430 mph
Sound Intensity: 131 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.
And my favorite part
The impact-generated tsunami wave arrives approximately 1.36 hours after impact.
Tsunami wave amplitude is between: 254 meters ( = 833 feet) and 508 meters ( = 1670 feet).
image an 833 foot wave 300 miles away… all from a 1 mile wide iron asteroid.