Impact: Earth A meteor/comet impact simulator

In summary, Impact: Earth! provides a simulation of a meteor/comet impact, with a variety of settings to play with. The more interesting impacts are the ones with a distance from the impact of 950 km (Ceres!), with a maximum wind velocity of 3200 mph. For those within 1 km, the impact is said to be boring, but at 1000 km, the wind speeds are dangerous. The average interval between impacts of this size is longer than the Earth's age, which means that this event will only happen during the accumulation of the Earth. All in all, it's an interesting tool, for the future, when the media gets all woo-wooey with doom and gloom.
  • #1
OmCheeto
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Impact: Earth!

A meteor/comet impact simulator(text only) provided by Purdue University.

Lots of fun. :smile:

You can smash things into the Earth varying the diameter, density, velocity, angle, land or water entry, and your distance from impact.

1 meter: very boring. happens every 1.1 year. Even if you are within 1 km, they claim you can't hear it.
950 km(Ceres!): also kind of boring, but I had the speed set at minimum. Though at 1000 km, you'll be hit by 50,000 mph winds, and be covered by 36 miles of "ejecta".

The middling things are more interesting.
And you can chose from a list.

Apophis!: 260 meters
My settings: 72 m/s, 90° entry, impacting sedimentary rock
At 10km from impact:
Max wind velocity: 1430 m/s = 3200 mph
Duration of Irradiation: 1.39 minutes
Radiant flux (relative to the sun): 1880
Sound Intensity: 130 dB (Dangerously Loud)​

Ha! Dangerously loud, so cover your ears, before you're hit by 3200 mph winds, and burst spontaneously into flames. Ha!

Anyways, it's something to play with, if you're bored.

ps. This came across on Facebook today. There was a related video apparently put together by the Discovery Channel, that lasts about 5 minutes.
It's a simulation of a 500 km asteroid striking somewhere in the Pacific ocean.
The music is very nice: The Great Gig In The Sky, from Dark Side of the Moon.
 
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  • #3
Greg Bernhardt said:
oh boy this is devilishly fun! Anyone will some interesting numbers?
If you skip the moon like a rock on a pond, at zero degrees, nothing happens. (any speed)
If you change the angle of entry to 1°, all hell breaks loose: Richter Scale Magnitude: 14.6 (This is greater than any earthquake in recorded history)
At 90° and full speed: 100 percent of the Earth is melted. And FYI, the average depth of the Pacific is about 4300 meters. Tsunamis are fun too. But the asteroids have to be pretty big. A 10 meter iron asteroid disintegrates between 1/2 and 10 miles above the surface of the earth, depending on it's initial velocity.

100 meter asteroids make good tsunamis.
150 - 300 ft high. (minimum entry speed)
740 - 1480 ft high (maximum entry speed)​
 
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  • #4
Greg Bernhardt said:
oh boy this is devilishly fun! Anyone will some interesting numbers?
It's more scary than fun. Especially the video :eek:
 
  • #5
zoki85 said:
It's more scary than fun. Especially the video :eek:

The video is mostly Hollywood.
According to "Impact: Earth!", regarding an asteroid of that size:

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.

I think this will be a useful tool, for the future, when the media gets all woo-wooey with doom and gloom, and their scary numbers.

For instance:

Asteroid that raced past Earth at 33,000mph last night came closer than the MOON
4-March-2014
Asteroid's 2014 DX110 closest approach will be at 21:07 GMT (16:07 EST)
It is 98ft (30m) across and will get within 217,000 miles (350,000km) of Earth
Asteroid is traveling at 33,000 mph and is not expected to hit the planet
...

Now we have a tool to plug the numbers into, and can see what happens.

The average interval between impacts of this size somewhere on Earth is 523 years

Final Crater Diameter: 1.05 km ( = 0.651 miles )
Final Crater Depth: 223 meters ( = 732 feet )


Quite impressive crater!
If it were to impact the heart of my city, it would kill tens of thousands.
But I live 8 km away, and would feel only a minor earthquake (4.7).
And the air blast is still quite impressive at such a distance:
Max wind velocity: 33.7 m/s = 75.4 mph
Sound Intensity: 84 dB (Loud as heavy traffic)
Damage Description:
Glass windows will shatter.

But diddling with the numbers, you can see that most of my friends would probably die!
2 km from the epicenter:
Peak Overpressure: 211000 Pa = 2.11 bars = 30 psi
Max wind velocity: 297 m/s = 665 mph
[= dead, imho]​
3 km:
Max wind velocity: 162 m/s = 362 mph [= probably dead]​
But, in the bigger scheme of things, based on PF's x-axis picture limit, the crater would be as big as a single pixel in the below image.

New game. Find the crater!

pf.2015.03.02.1747.one.pixel.asteroid.crater.find.it.jpg
 
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  • #6
Any idea how to make a really deep crater? At best while leaving most of the planet more or less intact.

(Even if I crash 300 km of iron at 72 km/s, almost perpendicular, I get underwhelming 4.3 km deep crater)
 
  • #7
Czcibor said:
Any idea how to make a really deep crater? At best while leaving most of the planet more or less intact.

(Even if I crash 300 km of iron at 72 km/s, almost perpendicular, I get underwhelming 4.3 km deep crater)

ya nic nie wiem.:rolleyes:
 

1. How accurate is the impact simulator?

The impact simulator, Impact: Earth, uses complex mathematical models and data from real meteor/comet impacts to provide accurate simulations. However, it is important to note that the results are still estimates and may vary depending on the specific conditions of the impact.

2. Can I choose the location and size of the impact?

Yes, the impact simulator allows users to input the location, angle, and size of the impact. You can also adjust other variables such as the density, strength, and velocity of the impactor to customize the simulation.

3. What kind of damage can I expect from a meteor/comet impact?

The impact simulator provides information on the potential effects of an impact, including the size of the crater, the amount of energy released, and the magnitude of seismic activity. It also estimates the potential for secondary effects such as tsunamis, wildfires, and climate change.

4. How can I use the impact simulator for research purposes?

Impact: Earth is a valuable tool for researchers studying the effects of meteor/comet impacts on Earth. The simulator allows for various scenarios to be tested, providing insights into potential mitigation strategies and the long-term consequences of impacts.

5. Is there a way to share or save my simulation results?

Yes, the impact simulator allows users to save their simulation results in a text file and share them with others. This feature is useful for educational purposes or for further analysis by researchers.

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