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Meteorite crash in Russia

rt.com

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Re: Meteorite crash in Russia

#161

Post by [deleted] »

creamyhorror wrote: post #64
mmastrac wrote: post #31

Here's a collection of insane videos of the event, some with the enormous sonic boom: http://www.youtube.com/watch?v=XIAm5hq8WWc http://www.youtube.com/watch?v=b0cRHsApzt8 http://www.youtube.com/watch?v=Np_mpGYSBSA Can anyone translate what they are saying in the first one? You can get a good idea of the new videos being posted using YouTube's "last hour" filter: http://www.youtube.com/results?search_query=%D0%BC%D0%…

Here's a great dashcam video that captures the meteor arcing across its field of vision and lighting up the scene more brightly than the sun like a nuclear blast (first submitted to HN by dennisgorelik). I almost thought it was a hoax, and even tried to examine the video for signs that it was CGI. http://www.youtube.com/watch?v=tJOJ6B2XOyA The guy doesn't even say anything for a long while, just starts speeding up. e…

[deleted]

Re: Meteorite crash in Russia

#163

Post by lampooned »

spitx wrote: post #104

8:10 GMT: Oleg Malkov, an aerospace scientist at Moscow State University, told Komsomolskaya Pravda newspaper that the meteorite went undetected by space scanners, likely because it was coming from the direction of the Sun. "We can only register stones coming from the direction of the night sky," he explained. Malkov confirmed that the meteor shower in the Urals was not connected to the 2012DA14 asteroid that will ap…

That is terrifiying.

Re: Meteorite crash in Russia

#164

Post by Udo »

InclinedPlane wrote: post #152
InclinedPlane wrote: post #56

Earlier quoted context omitted.

I'm almost certain that's a sonic boom. The upper atmosphere is several miles high and it would take the better part of a minute for the sound from a sonic boom to reach the ground from the stratosphere.

I'm going to change my mind on this. The more I watch videos the more I'm convinced that the loud bangs are actually the sound of the meteor exploding in an air burst, although I think there are some sonic booms mixed in. Edit: OK, I'm going back to it being a sonic boom. The sounds are too sharp and too similar to other sonic booms. That's what I get for not trusting my gut the first time.

I think your original impression was correct. The first big bang is most likely a sonic boom that occurred shortly after entering the atmosphere. There are several smaller bangs and some crackling noise after that. Some of these I suspect are echoes, but party it would also be the sound of the thing passing through the air, and then possibly breaking up. I doubt the burst from the breakup was that loud (it looked more like a relatively gentle split), especially compared to the massive energy that the entry interface boom must have released.

Damn that thing was fast! Tore through the whole atmosphere in just a few seconds...

Re: Meteorite crash in Russia

#165

Post by laumars »

InclinedPlane wrote: post #156
pacomerh wrote: post #148

Earlier quoted context omitted.

I don't understand why some of the people are still listening to the radio and so uninterested.

The number 1 most important factor in dealing with emergencies is recognizing that an emergency is happening in the first place. It's easy to get mislead by movies and tv and the way things happen and the way people react. In reality things don't work that way. It can sometimes be difficult to tell when an emergency is happening, and a lot of people won't pay enough attention. How often do people ignore fire alarms,…

Good post

Getting back to this specific topic, there's also the issue that, when driving, your own safety is still paramount.

Even if this was recognised as an emergency, there's very little a driver can do to react while he's inside a moving vehicle on a busy road.

Re: Meteorite crash in Russia

#166

Post by madaxe »

creamyhorror wrote: post #64
mmastrac wrote: post #31

Here's a collection of insane videos of the event, some with the enormous sonic boom: http://www.youtube.com/watch?v=XIAm5hq8WWc http://www.youtube.com/watch?v=b0cRHsApzt8 http://www.youtube.com/watch?v=Np_mpGYSBSA Can anyone translate what they are saying in the first one? You can get a good idea of the new videos being posted using YouTube's "last hour" filter: http://www.youtube.com/results?search_query=%D0%BC%D0%…

Here's a great dashcam video that captures the meteor arcing across its field of vision and lighting up the scene more brightly than the sun like a nuclear blast (first submitted to HN by dennisgorelik). I almost thought it was a hoax, and even tried to examine the video for signs that it was CGI. http://www.youtube.com/watch?v=tJOJ6B2XOyA The guy doesn't even say anything for a long while, just starts speeding up. e…

There probably is a nuclear blast in that mix. They stated that anti-missile systems intercepted it - the only thing with a hope in hell of reaching and destroying/breaking a meteor is the 53T6 Gazelle, which has a 10kt warhead.

Re: Meteorite crash in Russia

#167

Post by madaxe »

abcd_f wrote: post #136
creamyhorror wrote: post #64

Earlier quoted context omitted.

Here's a great dashcam video that captures the meteor arcing across its field of vision and lighting up the scene more brightly than the sun like a nuclear blast (first submitted to HN by dennisgorelik). I almost thought it was a hoax, and even tried to examine the video for signs that it was CGI. http://www.youtube.com/watch?v=tJOJ6B2XOyA The guy doesn't even say anything for a long while, just starts speeding up. e…

The RT article quote local (military) newspaper as saying "A missile salvo blew the meteorite to pieces at an altitude of 20 kilometers". I wonder if it's true.

If it is true, they've been lobbing nukes - their principal ABM for ICBMs/fast re-entry is the Gazelle - 10kt warhead.

Re: Meteorite crash in Russia

#168

Post by dredmorbius »

InclinedPlane wrote: post #156
pacomerh wrote: post #148

Earlier quoted context omitted.

I don't understand why some of the people are still listening to the radio and so uninterested.

The number 1 most important factor in dealing with emergencies is recognizing that an emergency is happening in the first place. It's easy to get mislead by movies and tv and the way things happen and the way people react. In reality things don't work that way. It can sometimes be difficult to tell when an emergency is happening, and a lot of people won't pay enough attention. How often do people ignore fire alarms,…

This in spades. Emergencies aren't announced as they are in Hollywood movies with dramatic music and leading actors. The most striking thing about many disasters is how mundane they are, and how slow people, even those aware of the situation and its gravity, are to respond. Spend some time watching videos of the 2011 Tōhoku earthquake and tsunami and what I'm most struck with is how long people act as if things are normal. Granted it took several tens of minutes for the tsunami waves to reach shore after the earthquake, and even then several minutes for the tsunami to reach full strength.

Technological, fiscal, and other crises are similar. Often your first real sign of trouble isn't a sense of impending doom as just a very strong sense that things are wrong -- your perception of the world isn't adding up. I've trained myself (or tried) to recognize such situations and respond more quickly to them, but it's still easy to miss things. Especially as it's not clear until later (and often much, much later) just what has gone wrong and what's the best way to address it. In military it's called "fog of war", but a similar condition pervades most complex situations.

Re: Meteorite crash in Russia

#169

Post by InclinedPlane »

laumars wrote: post #165
InclinedPlane wrote: post #156

Earlier quoted context omitted.

The number 1 most important factor in dealing with emergencies is recognizing that an emergency is happening in the first place. It's easy to get mislead by movies and tv and the way things happen and the way people react. In reality things don't work that way. It can sometimes be difficult to tell when an emergency is happening, and a lot of people won't pay enough attention. How often do people ignore fire alarms,…

Good post Getting back to this specific topic, there's also the issue that, when driving, your own safety is still paramount. Even if this was recognised as an emergency, there's very little a driver can do to react while he's inside a moving vehicle on a busy road.

Indeed. Also, when driving, what are your options? Unless you think you need to stop the car and seek shelter immediately the best option might just be to head home as soon as possible.

Re: Meteorite crash in Russia

#170

Post by colkassad »

DeepDuh wrote: post #57
mmastrac wrote: post #31

Here's a collection of insane videos of the event, some with the enormous sonic boom: http://www.youtube.com/watch?v=XIAm5hq8WWc http://www.youtube.com/watch?v=b0cRHsApzt8 http://www.youtube.com/watch?v=Np_mpGYSBSA Can anyone translate what they are saying in the first one? You can get a good idea of the new videos being posted using YouTube's "last hour" filter: http://www.youtube.com/results?search_query=%D0%BC%D0%…

This one is much better, it actually shows the incoming meteor: http://www.youtube.com/watch?v=1wUqmS35REY

You can see the blast wave as well
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