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  (Source: RT.com)
It exploded around 9:20 a.m. local Moscow time

A meteor exploded in the sky above Russia early Friday morning, shattering the glass of thousands of windows and leaving many citizens injured.

The meteor, estimated to be about 10 tons, entered the Earth's atmosphere traveling at 33,000 MPH and exploded around 9:20 a.m. local Moscow time. The explosion occurred over Russia's Urals region about 18-32 miles above the ground.

According to Chelyabinsk health chief Marina Moskvicheva, about 985 people in the city of Chelyabinsk alone required medical assistance. Approximately 110 of them have been hospitalized, and about 159 of the injured were children. This doesn't include other possibly injuries in other cities.

The Emergency Ministry said 20,000 rescue workers have been mobilized.

Vladimir Stepanov of the National Center for Emergency Situations at the Russian Interior Ministry said about 270 buildings have been damaged due to the explosion, where most of it consists of broken glass. Hospitals and schools are some of the buildings affected.

Another report from RT.com said 3,000 buildings alone were affected in Chelyabinsk, where shattered window glass measured 100,000 square meters.

The Russian space agency Roscosmos said that one meteroid entered the atmosphere and burned into meteorites that spread across three regions in Russia, including Chelyabinsk. Some were believed to be scattered in neighboring Kazakhstan as well.

Check out this video, which shows the meteor nearing the ground and exploding:

Sources: RT, Huffington Post



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By 91TTZ on 2/15/2013 12:36:39 PM , Rating: 4
The media is reporting that the meteor "exploded" because of the loud boom that was heard. However this is not correct.

The meteor entered the atmosphere and eventually broke into pieces and burned up. The loud boom that you heard was the sonic boom from the meteor traveling through the atmosphere at supersonic speeds. You also hear smaller sonic booms immediately afterwards caused by the shockwaves of the meteor fragments passing by. The damage that occurred was caused by the overpressure from the sound wave. It's no different than if a supersonic aircraft passed overhead.

Here is a video of the Concorde passing over the ocean:
https://www.youtube.com/watch?v=annkM6z1-FE

You'll notice that the Concorde passes overhead and you can't hear anything until the shockwave reaches the ground, with the characteristic "sonic boom". That's because it flies at up to 60,000 feet. If it was flying supersonic any lower it would shatter windows and damage buildings.

This is what happens when a smaller aircraft flies supersonic over buildings:

https://www.youtube.com/watch?v=podqKi-q04w

Watch it in HD. Notice how it blows out the windows in that building. These pilots made a mistake.

Judging by how long it took for the shockwave to reach the ground after this meteor passed overhead gives you a pretty good idea of how far away it was. And seeing how much damage it caused should give you an idea of just how powerful it was and how much damage it could have caused if its trajectory caused it to travel at a lower altitude.




By 91TTZ on 2/15/2013 2:46:45 PM , Rating: 3
Traveling supersonic is exploding? So the Concorde exploded overhead in my video? Those Brazilian Mirages exploded?


By ChronoReverse on 2/15/2013 2:53:02 PM , Rating: 2
The meteor broke up and maybe astronomers call that "exploding" but the point made here was that the "boom" wasn't the sound of the breakup/explosion but rather just the sonic boom of a large massively hypersonic object.


By geddarkstorm on 2/15/2013 5:10:07 PM , Rating: 2
Yes, the meteor breaking into fragments like that is called exploding in astronomy, that is the correct term/description for the event.

Gotta get used to jargon and not over think jargon vs. common usage of words.


By johnsmith9875 on 2/16/2013 4:19:10 PM , Rating: 2
Well if the meteor was made of a mix of carbon dioxide snow, ice and rock, then definitely it would explode because the internal pressures from the heated steam would make it literally explode.


By augiem on 2/15/2013 5:07:42 PM , Rating: 2
The news reports I read all mentioned the sonic boom. I didn't see any attribute the shattered glass to the shockwave of an explosion.


By ChronoReverse on 2/15/2013 5:13:19 PM , Rating: 2
Perhaps it's been corrected but most news sources this morning attributed the boom to the explosion rather than the sonic boom (e.g., CNN, National Post)


By augiem on 2/15/2013 7:45:07 PM , Rating: 3
Hmm... Just found this:

quote:
The blast released energy comparable to a 300- to 500-kiloton nuclear warhead, says Bill Cooke, who heads the meteoroid environment office at NASA's Marshall Space Flight Center in Hunstville, Ala. By Comparison, the Nagasaki nuclear bomb had a yield of 20 to 22 kilotons.


Source: http://www.csmonitor.com/Science/2013/0215/Russian...


By augiem on 2/15/2013 8:14:28 PM , Rating: 3
After reading more about the meteor, I don't think your analysis is correct.

This explosion had 20-33 times the energy of the Little Boy dropped on Hiroshima (300-500 kilotons vs 15). According to estimates, the major exlposion/breakup occurred at an altitiude anywhere between 12 and 32 miles high (Nasa said 12-15, Russia said 19-32), compared to 1,968 ft at Hiroshima. At the low end of the estimate, that's 63,360 ft high -- 3,000 feet higher than the Concorde's maximum cruising altitude. At the high end of the esitmate, that's 168,960 ft -- the top edge of the stratosphere.

Had this thing broken up closer to earth, we could have seen some major damage.

Now if the articles I read are misinterpreting NASA's words and and the total energy of the object was 300-500 KT, then maybe I'm wrong.


By augiem on 2/15/2013 8:15:36 PM , Rating: 2
Forgot the point: That kind of explosion is going to make one heck of a shockwave and sound.


By 91TTZ on 2/17/2013 1:16:31 PM , Rating: 2
What you're seeing is the media incorrectly reporting what they've heard scientists saying.

The figure they gave for the "explosion" is actually the figure for the kinetic energy of the meteor. Basically it's just mass x velocity. Since it obviously came to a stop it had to dissipate all that kinetic energy in the atmosphere. It doesn't mean that it exploded.


By tng on 2/15/2013 10:01:31 PM , Rating: 2
I grew up in an area that was near a Air Force training range and we got sonic booms practically everyday. It would rattle windows and as kids we thought it was cool.

I think that most of what we heard was from F-102s, that were pretty long in the tooth even then. We rarely saw them in the sky, but the booms would give them away even though we could not hear the engines.

This meteor was a completely different aerodynamic profile (if you can call it that) than a plane, moving at literally Mach 40+, so I could imagine that the sonic boom was much more forceful for that reason.


tut tut tut
By Amiga500 on 2/15/2013 12:12:40 PM , Rating: 2
Harry Stamper didn't push the frekkin button early enough.




RE: tut tut tut
By Reclaimer77 on 2/15/2013 12:13:52 PM , Rating: 2
Liar! Harry Stamper doesn't know how to fail!


RE: tut tut tut
By gnac on 2/15/2013 12:20:36 PM , Rating: 2
apparently he was past the zero point when he hit the button.....


RE: tut tut tut
By Brandon Hill (blog) on 2/15/2013 12:45:34 PM , Rating: 2
Liv Tyler wants some more animal crackers


RE: tut tut tut
By Amiga500 on 2/15/2013 12:21:28 PM , Rating: 6
It seems there actually was a job that Mr-all-go-no-quit big nuts Harry Stamper couldn't handle...


RE: tut tut tut
By Reclaimer77 on 2/15/2013 12:23:28 PM , Rating: 2
lol I better stop playing this game with you, lest it become apparent how many times I've watched that guilty pleasure :)


RE: tut tut tut
By Brandon Hill (blog) on 2/15/2013 12:36:38 PM , Rating: 4
"United States government just asked us to save the world. Anybody wanna say no? Well, except you Reclaimer."

;-)


RE: tut tut tut
By Amiga500 on 2/15/2013 12:46:03 PM , Rating: 5
Reclaimer:

"The bloody government are already getting involved in too many things without wanting to rule the roost on asteroids.

It should be Space-X destroying that meteorite. Grrr"

:-D


...
By heffeque on 2/15/2013 12:05:47 PM , Rating: 5
There are quite a few videos on YouTube and... FFFFFck. Also... they seem to be pretty calm about it. If it were the States people would be yelling their lungs out saying "Wow! WTF! Look at that! SoooOOOoo awesome!".




RE: ...
By DPigs on 2/15/13, Rating: 0
RE: ...
By Reclaimer77 on 2/15/13, Rating: -1
RE: ...
By iamezza on 2/15/2013 12:33:02 PM , Rating: 3
I think there should be a ban on stupid comments that try to bring up a political agenda on a completely unrelated topic!


RE: ...
By ClownPuncher on 2/15/2013 2:12:09 PM , Rating: 1
Just like you Democrats, trying to ban free speech.

:)


RE: ...
By Cheesew1z69 on 2/15/2013 2:27:00 PM , Rating: 1
Should just be a ban on stupid comments period..


RE: ...
By Motoman on 2/15/13, Rating: -1
RE: ...
By kamiller422 on 2/15/13, Rating: -1
RE: ...
By foolsgambit11 on 2/15/2013 2:38:54 PM , Rating: 5
Either that, or they'd declare a War on Space, and launch a shock and awe campaign against the asteroid belt, which has been harboring meteors for years.


RE: ...
By arazok on 2/15/2013 3:58:12 PM , Rating: 3
That’s pretty funny.

I also heard that N Korea claimed it was their newest weapon. Iran photoshopped it with their flag on it, and Putin said he destroyed it with his mind.


RE: ...
By Mitch101 on 2/15/2013 10:10:44 PM , Rating: 2
Ancient alien theorists believe the meteor story was a cover up for destroying an alien space ship over russian soil.


RE: ...
By spamreader1 on 2/15/2013 2:54:53 PM , Rating: 2
or banning windows...


RE: ...
By Donkey2008 on 2/16/2013 4:54:17 PM , Rating: 1
quote:
If it were in the States, Democrats would already be exploiting the injured trying to pass a law banning meteors.


Says the nerd who has probably never fired, let alone held, a gun in his life.


RE: ...
By ClownPuncher on 2/15/2013 12:38:33 PM , Rating: 2
That's because Russians are Russian.


RE: ...
By CaedenV on 2/15/2013 2:43:50 PM , Rating: 2
In soviet Russia the people explode meteors. Russians are not afraid of large explosives.


RE: ...
By MrBlastman on 2/15/13, Rating: 0
It's a good thing...
By MZperX on 2/15/2013 12:51:52 PM , Rating: 4
... it wasn't Tunguska part 2.




RE: It's a good thing...
By geddarkstorm on 2/15/2013 5:24:03 PM , Rating: 2
Seriously. When I saw the headline, I was afraid of just that. The meteor passing by today is a size big enough to be a second Tunguska event. I guess this littler meteor was riding along near it.

A good warning shot across our bow. While we've mapped most of the Earth Crushing asteroids in our orbit, we have barely scratched the surface of mapping the medium weights, which can devastate and obliterate cities. Hopefully NASA continues to get the funding it needs to finish up the sky survey, even if as it is there are little options available at the moment for deflecting/destroying an incoming object. If we see it soon enough, we can invent a way.


RE: It's a good thing...
By Amiga500 on 2/15/2013 7:04:11 PM , Rating: 2
Who gives a sh!t if we can just track it.

It is actually being able to do something about it that counts!


RE: It's a good thing...
By Reclaimer77 on 2/15/2013 7:09:40 PM , Rating: 2
Wouldn't it be awesome if we were the only ones who could do something about it?

Think about it!

"Oh you want to keep testing nukes North Korea? Okay sure, fine. Oh by the way a 3 mile wide asteroid is going to impact your nation in six months. Unfortunately our Orbital Defense Grid will be down for ummm maintenance, yeah maintenance, that week. Have a good life!"


RE: It's a good thing...
By drycrust3 on 2/16/2013 1:32:07 PM , Rating: 2
quote:
Oh by the way a 3 mile wide asteroid is going to impact your nation in six months.

This does raise a moral issue, which is we now, for the first time in recorded history, have the ability to determine where an asteroid might hit, so if the area of impact was calculated to be a major population centre, say New York, Tehran, Calcutta, etc, would the rest of the world put in some effort to evacuate the population from that city and accommodate them? Or say the area of impact was larger, say it was quarter of the earth's surface e.g. the whole of North America, or the whole of Europe, or the whole of Africa, would we just shrug our shoulders and say "Not my problem" or actually do something other than help just the rich and powerful escape the immediate blast?


RE: It's a good thing...
By Skywalker123 on 2/16/2013 5:41:11 PM , Rating: 1
an impact crater of only a few hundred miles, much less a continent size crater would destroy much if not all life on the planet, so, no worries there.


Mammals
By BioHazardous on 2/15/2013 3:02:58 PM , Rating: 2
Too bad...
By johnsmith9875 on 2/16/2013 4:05:42 PM , Rating: 2
This is being treated as a curiosity. It won't inspire congress to fund more meteor monitoring or create an official agency tasked with doing so. Right now its just a bunch of volunteers tracking NEO's.




a
By russki on 2/15/2013 2:19:03 PM , Rating: 1
Yob tvou mat, polniy pizdez!




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