Meteorite explosion over Russia injures hundreds. - Page 1
Forum section: electronics / general

author: firewalker
author_rank: Super Contributor
timestamp: February 15, 2013, 10:13:49 am
content: http://www.guardian.co.uk/science/2013/feb/15/meteorite-explosion-shakes-russianAlexander.?!

author: ecat
author_rank: Frequent Contributor
timestamp: February 15, 2013, 10:24:08 am
content: Hopefully no serious injuries, for what an amazing sight.These Russians are so cool about it too. I'd be pointing and shouting and full of excitement.

author: Unknown
author_rank: Unknown
timestamp: February 15, 2013, 10:35:29 am
content: 0:25 WTF?0:26 Is this a bombardment?0:27 Maybe an exercise ?I am so glad that the Russians are not trigger hippes....

author: firewalker
author_rank: Super Contributor
timestamp: February 15, 2013, 02:29:40 pm
content: Is a vehicle camera standard in Russia?Alexander.

author: AlfBaz
author_rank: Super Contributor
timestamp: February 15, 2013, 02:44:58 pm
content: The one video that's available doesn't make sense. He's showing the trail in the sky, which looks as though its been up there for quite some time, especially if you consider the fact that the trail is not being swept away by strong winds. Then there's a bang and the windows break but the power lines are completly still and then there are more bangs in the distance...

author: firewalker
author_rank: Super Contributor
timestamp: February 15, 2013, 02:53:07 pm
content: The shock wave speed is relatively low. It could take up to couple minutes to reach an area. The power lines have an aerodynamic shape (cylinder) and small surface area for the shock wave to have an impact. The secondary explosions could be other pieces exploding or echoed shock wave.Alexander.

author: AlfBaz
author_rank: Super Contributor
timestamp: February 15, 2013, 03:03:02 pm
content: Yeah I guess that's pssible.Have a look at this other one here. Pay particular attention to what the start of the cloud streak looks like. Each streak starts as a ball then a curly bit. If you llsten closely to the guy filming I think I can hear him say a word that sounds like military

author: MikeK
author_rank: Super Contributor
timestamp: February 15, 2013, 04:13:37 pm
content: Quote from: firewalker on February 15, 2013, 02:29:40 pmI wondered the same thing. I asked the Russian guy I work with and he said that many expensive cars in Russia have this "security cam" feature...so that in cases of accidents they can provide video to the police.

author: tom66
author_rank: Super Contributor
timestamp: February 15, 2013, 04:17:59 pm
content: It's apparently due to idiots like this:Insurance fraud is rife in Russia. A dash cam provides easy evidence against the claim.

author: Mechatrommer
author_rank: Super Contributor
timestamp: February 15, 2013, 04:31:59 pm
content: the first video got deleted why?

author: BillyD
author_rank: Regular Contributor
timestamp: February 15, 2013, 04:39:02 pm
content: Yes, apparently they don't trust the police, and insurance fraud is a bit problem.And absolutelyanythingcan happen on the roads there, from a kids buggy trundling across the road in front of you, to getting your roof almost grazed by a low flying helicopter. And these things seem to happen on a daily basis, it's literally jaw dropping. Not sure if I can link directly to it from here but my fav is Claudio Paskuale on youtube, well worth a look -www.youtube.com/user/claudiopaskuale

author: Frantone
author_rank: Regular Contributor
timestamp: February 15, 2013, 04:39:52 pm
content: I saw this footage when the story broke early this morning (USA) and my impressions are that due to the intense in-atmosphere explosion that this would not have been a meteor (which are primarily rocky bodies, many with solid iron cores) but in fact a very small cometary fragment. A cometary fragment caused the Tunguska event in 1908, and this one that hit today would have been very small - too small to be seen by ground based telescopes - but comet shards contain immense amounts of energy.

author: firewalker
author_rank: Super Contributor
timestamp: February 15, 2013, 04:40:53 pm
content: The first video. Nothing special. Don't know why the user took it down.Just search for "asteroid explosion Russia" on YouTube.Alexander.

author: firewalker
author_rank: Super Contributor
timestamp: February 15, 2013, 04:47:21 pm
content: Quote from: Frantone on February 15, 2013, 04:39:52 pmI believe the official name for that kind of objects is "Bolides" (from the Greek Bolida which means a small object moving really fast. Eg, a bullet).Alexander.

author: MikeK
author_rank: Super Contributor
timestamp: February 15, 2013, 04:52:28 pm
content: Quote from: firewalker on February 15, 2013, 04:47:21 pmApparently too fast for someone to stick an Arduino on it.

author: Mechatrommer
author_rank: Super Contributor
timestamp: February 15, 2013, 04:55:09 pm
content: woa!. caught live... (4:35)??if that thing hit inhabitants fresh, nothing will survive.

author: MikeK
author_rank: Super Contributor
timestamp: February 15, 2013, 05:08:33 pm
content: They found three impact sites. Left quite a small crater.lake crater:article:http://rt.com/news/meteorite-crash-urals-chelyabinsk-283/

author: Mechatrommer
author_rank: Super Contributor
timestamp: February 15, 2013, 05:14:11 pm
content: yup luckily they hit water. if they hit metal or concrete, that will be more fun.

author: Unknown
author_rank: Unknown
timestamp: February 15, 2013, 06:11:39 pm
content: Quote from: Mechatrommer on February 15, 2013, 04:31:59 pmHe was being asked in the comments by the CNN for the rights of the video. Probably sold it to them.

author: free_electron
author_rank: Super Contributor
timestamp: February 15, 2013, 06:41:40 pm
content: Quote from: AlfBaz on February 15, 2013, 03:03:02 pmwhy are there two parallel trails ?

author: G7PSK
author_rank: Super Contributor
timestamp: February 15, 2013, 06:53:20 pm
content: Is there a whole bunch of these objects coming around every 105 years. Perhaps the big one will hit in another 105 years after its orbit gets nudged this time around.

author: ecat
author_rank: Frequent Contributor
timestamp: February 15, 2013, 07:04:27 pm
content: I'd totally forgotten about this until nowhttp://neo.jpl.nasa.gov/news/news174.html... it was foretold. Or may just be co-incidental

author: SeanB
author_rank: Super Contributor
timestamp: February 15, 2013, 07:24:38 pm
content: Quote from: free_electron on February 15, 2013, 06:41:40 pmIt broke into 2 large parts when it got into denser air and this gave rise to the 2 trails as they slowly diverged. It probably mostly burned up and evaporated as it slowed down.We are raising our eyes and looking as the fireball bears down, rather like our avian ancestors did 65 million years ago.

author: Mechatrommer
author_rank: Super Contributor
timestamp: February 15, 2013, 07:51:56 pm
content: Quote from: SeanB on February 15, 2013, 07:24:38 pmin the video i linked, it can be clearly seen 2 entities flying at different velocities. maybe due to their geometry and density, they probably merged back together in the trail. and then later it can be heard several shockwaves, not just two but many smaller shocks, probably suggesting meteors shower?

author: firewalker
author_rank: Super Contributor
timestamp: February 15, 2013, 08:31:44 pm
content: Quote from: free_electron on February 15, 2013, 06:41:40 pmMaybe the object got split at contact with the upper layers of the atmosphere in a non catastrophic way. The two pieces followed an identical trajectory after that.Alexander.

author: Frantone
author_rank: Regular Contributor
timestamp: February 15, 2013, 09:56:26 pm
content: Quote from: Mechatrommer on February 15, 2013, 04:55:09 pmThe time from the flash to the bang was 140 seconds in this video, the speed of sound in cold air about .34Km/second give or take, so that explosion was about 47.5 kilometers away line of sight, still shattering glass. Amazing.

author: MikeK
author_rank: Super Contributor
timestamp: February 16, 2013, 01:10:33 am
content: Nice animation of the meteor strike: