Meteor shower hits Russia

[NRG-Vampire]

You could not have said it better !! :)

 

http://www.nasa.gov/mission_pages/asteroids/news/asteroid20130215.html

 

news:

...55 feet (17 meters), and its estimated mass has increased from 7,000 to 10,000 tons. Also, the estimate for energy released during the event has increased by 30 kilotons to nearly 500 kilotons of energy released :fear:

[BIGNEWY]

What really happened. :)

 

[Pilotasso]

[Speed]

;1677026']Wow... yesterday they were reporting it to be 10 tons!

 

That escalated quickly!

 

@Pilotasso .. Brilliant mate! :thumbup:

 

Yea, I tend to think that whoever said 10 tons was either misquoted, misspoke, or was not an actual scientist... a simple calculation can show that it is impossible for a 10 ton asteroid to cause an event like this.

[Sierra99]

They said most if not all damage was due to the shock wave which caused seismic activity.

 

 

Overpressure is a serious issue. It takes very little pressure to have a dramatic effect on a building. Expecially the way we build structures today. I would guess an airburst like that created a pressure wave on the order of several TONS from directions buildings are not designed to resist force from.

 

( Anyone here ever take a building construction class? :smilewink: )

 

Sierra

[Suchacz]

news:

...55 feet (17 meters), and its estimated mass has increased from 7,000 to 10,000 tons. Also, the estimate for energy released during the event has increased by 30 kilotons to nearly 500 kilotons of energy released :fear:

If they use the formula for kinetic energy and velocity is the same, than the new amount of energy will be smaller. But maybe the velocity was revised also. And maybe they are counting with other influences.

[Sierra99]

Yea, I tend to think that whoever said 10 tons was either misquoted, misspoke, or was not an actual scientist... a simple calculation can show that it is impossible for a 10 ton asteroid to cause an event like this.

 

 

Hey Speed, Don't forget, these are the same scientests who gorked a Mars landing over a simple Metric to English math error. :doh:

 

:D

[Cali]

Yea, I tend to think that whoever said 10 tons was either misquoted, misspoke, or was not an actual scientist... a simple calculation can show that it is impossible for a 10 ton asteroid to cause an event like this.

 

Nothing is impossible in this crazy world we live in.

[SUBS17]

HOLY CRAP!

That was one heck of a sonic boom. I imagine other videos will eventually surface that show the object during entry.

 

http://www.space.com/19801-possible-meteor-blast-russia.html

 

And this comes the same day as the closest recorded pass of a hazardous asteroid in history.

http://www.space.com/19646-asteroid-2012-da14-earth-flyby-complete-coverage.html

(We mentioned this object last year in this forum, http://forums.eagle.ru/showthread.php?t=86030 )

 

What an incredible coincidence.

 

An even bigger coincidence was in NZ Deep Impact was on TV the night before lol.

[Speed]

Nothing is impossible in this crazy world we live in.

 

Well, I would disagree... from very the beginning, it was pretty clear that the explosion had to have carried well in excess of 25 kilotons explosive power. 25 kilotons = 2.5e4*4.2e9 J = 1.05e14 J. Just using 1.05e14 = (1e4)*v^2/2, you can see that a 10 metric ton asteroid (m = 1e4 kg) would have to be travelling at 145 km/s- an impossibly fast speed- to deliver just 25 kt of explosive power (besides, the video clearly showed it was going much slower than that). At typical entry velocities (15 km/s) a 10 metric ton asteroid only carries like a quarter kiloton TNT explosive power.

Edited February 17, 2013 by Speed

[asparagin]

I would guess an airburst like that created a pressure wave on the order of several TONS

( Anyone here ever take a building construction class? :smilewink: )

 

--if there are buildings constructors here, I sure hope for out sake, they they can match the correct units for pressure..

[asparagin]

Yea, I tend to think that whoever said ..

 

Nothing is impossible in this crazy world we live in.

 

Well, I would disagree...

 

..so you disagree with your other self? :juggle:

[Speed]

..so you disagree with your other self? :juggle:

 

Yea, when I am so badly taken out of context :D

[asparagin]

Thought I save some webspace. Quoting the whole posts still don´t make it logical.

 

ps: you forgot to start your discourse by honestly admitting your own fallibility :D

[Pilotasso]

:cry:

 

[Kevlon]

how did you get that scar? " I got injured by a meteorite " .. Now, that is Russia for you..

Edited February 17, 2013 by Kevlon

[Speed]

Thought I save some webspace. Quoting the whole posts still don´t make it logical.

 

ps: you forgot to start your discourse by honestly admitting your own fallibility :D

 

I think we're interpreting Cali's post in opposite ways. To me, after I said it would be impossible for a 10 ton asteroid to cause this, he said "nothing's impossible". So I did the quick calculation I referred to.

[Cali]

Well, I would disagree... from very the beginning, it was pretty clear that the explosion had to have carried well in excess of 25 kilotons explosive power. 25 kilotons = 2.5e4*4.2e9 J = 1.05e14 J. Just using 1.05e14 = (1e4)*v^2/2, you can see that a 10 metric ton asteroid (m = 1e4 kg) would have to be travelling at 145 km/s- an impossibly fast speed- to deliver just 25 kt of explosive power (besides, the video clearly showed it was going much slower than that). At typical entry velocities (15 km/s) a 10 metric ton asteroid only carries like a quarter kiloton TNT explosive power.

 

All those numbers you posted are good, but that doesn't mean that things out of the norm can't and don't happen. Look at how many things happen that can't be explained?

[SkateZilla]

all i hear in the one video is a club remix of bleeding love...

[Speed]

All those numbers you posted are good, but that doesn't mean that things out of the norm can't and don't happen. Look at how many things happen that can't be explained?

Well, I can't really argue with that- who would have thought that the biggest known/confirmed meteor explosion in over 100 years would occur within hours of the closest recorded pass of hazardous asteroid in history?

 

However though, you don't want to give any credence to wildly unlikely explanations if there is a far more likely, mundane explanation. Most people agree with this, but a lot of folks have a hard time telling the wildly unlikely explanations from the more likely ones... probably because the wildly unlikely explanations are a lot more fun to believe in.

[Namenlos Ein]

Korkino, 42 km south of Chelyabinsk.

 

02/15/2013, somewhere in California…

Edited February 18, 2013 by Namenlos Ein

[leafer]

The mythbusters should have used a meteor instead of an F/A-18 on that "can a sonic boom break windows" episode huh? :D

[GUMAR]

In any case that was awesome.

[Speed]

In any case that was awesome.

 

Then I suppose you agree with this Onion news satire?

http://www.theonion.com/articles/more-than-1000-russians-injured-in-freaking-cooles,31321/

 

So far, maybe it's OK to joke about it because no one was killed (even if that wasn't the case, the Onion wouldn't care though, I'm sure :D). However, I was worried that with so many windows broken, some people could die from exposure to the cold. Do you know if everyone warm enough? If not, it could be that this meteor DID in fact kill somebody, albeit, indirectly.

[Hamblue]

The mythbusters should have used a meteor instead of an F/A-18 on that "can a sonic boom break windows" episode huh? :D

I think they determined that it was an explosion and not just a sonic boom.