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 Post subject: Russian meteor
PostPosted: Fri Feb 15, 2013 10:25 am 
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Did anyone see this?

http://www.youtube.com/watch?v=90Omh7_I8vI

And the shockwave:

http://www.youtube.com/watch?v=pFBtfR54Svk

:shock:

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 Post subject: Re: Russian meteor
PostPosted: Fri Feb 15, 2013 12:44 pm 
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Yes amazing ! :shock:

Here you can see an asteroid passing : http://www.ustream.tv/nasajpl2

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 Post subject: Re: Russian meteor
PostPosted: Fri Feb 15, 2013 12:47 pm 
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I heard about it on the radio at work and had just been looking for videos of it. Astonishing. I was assuming it was related to the asteroid that is doing a flyby this evening, but apparently they are coming from opposite directions and it is just pure coincidence. :shock:

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 Post subject: Re: Russian meteor
PostPosted: Fri Feb 15, 2013 12:53 pm 
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http://www.youtube.com/watch?feature=pl ... Gqmw#at=84


Last edited by retropuzzlecollector on Fri Feb 15, 2013 1:03 pm, edited 1 time in total.

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 Post subject: Re: Russian meteor
PostPosted: Fri Feb 15, 2013 1:02 pm 
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Based on the angle of the meteor and the fact that it disintegrated in the air (the loud bang) this video is probably fake.

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 Post subject: Re: Russian meteor
PostPosted: Fri Feb 15, 2013 1:04 pm 
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retropuzzlecollector wrote:
http://www.youtube.com/watch?feature=player_embedded&v=b7mLUIDGqmw#at=84


Wow god is that real?


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 Post subject: Re: Russian meteor
PostPosted: Fri Feb 15, 2013 5:59 pm 
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Gus wrote:
Based on the angle of the meteor and the fact that it disintegrated in the air (the loud bang) this video is probably fake.

Or not.

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 Post subject: Re: Russian meteor
PostPosted: Fri Feb 15, 2013 7:09 pm 
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Gus wrote:
Based on the angle of the meteor and the fact that it disintegrated in the air (the loud bang) this video is probably fake.

That would be one of the biggest, most well executed fakes I've ever seen.


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 Post subject: Re: Russian meteor
PostPosted: Fri Feb 15, 2013 7:18 pm 
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eye2eye wrote:
Gus wrote:
Based on the angle of the meteor and the fact that it disintegrated in the air (the loud bang) this video is probably fake.

That would be one of the biggest, most well executed fakes I've ever seen.

Plus, the timing seems right: from impact with the atmosphere 10km above the earth, the shock wave (sonic boom) traveling at the speed of sound (340 m/s) would take about 30 seconds to reach the ground, smashing all the windows and setting off car alarms as it did.

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 Post subject: Re: Russian meteor
PostPosted: Fri Feb 15, 2013 8:38 pm 
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This was a really cool event. Too bad so many people were hurt from flying debris.

If you want to play with the parameters to estimate the effect, there is a good calculator here:
http://impact.ese.ic.ac.uk/ImpactEffects/

The estimates seem to be that the meteor was around 15m in diameter and probably 7000 metric tons. That would imply it had a density of ice. If instead we assume they rounded up the diameter and it was actually around 13 meters then the density matches porous rock.

Edit: Oops, I was assuming a metric ton was 2000 kg. It's 1000 kg. 15m diameter is exactly 7000 mt if you assume a density of 4000 kg per m^3 which implies very dense rock or dense rock and some metal.

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Last edited by Brandon Enright on Fri Feb 15, 2013 9:01 pm, edited 1 time in total.

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 Post subject: Re: Russian meteor
PostPosted: Fri Feb 15, 2013 8:51 pm 
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Here's one of the impact sites: http://img.gawkerassets.com/img/18eqlep ... xlarge.jpg


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 Post subject: Re: Russian meteor
PostPosted: Sat Feb 16, 2013 7:01 am 
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Apparently it hit with the force of 30 Hiroshima bombs! :shock:

http://www.telegraph.co.uk/science/spac ... bombs.html

Amazing that more people weren't hurt or killed. Thank God for the earth's atmosphere and magnetic field which protects it from erosion by cosmic and solar radiation!

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 Post subject: Re: Russian meteor
PostPosted: Tue Feb 19, 2013 5:14 pm 
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KelvinS wrote:
Thank God for the earth's atmosphere

Indeed.

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