The shortest period between the flash and the shock wave in the video is 89 seconds. Based on the height of the explosion is 0.305x89=27.15 km
perhaps Russian citizens would be wondering why one of the World's most capable space nations allowed a City to be destroyed.
I would also be very interested in eyewitness reports of electrophonic sound PRIOR to the acoustic shock -- that is, during the brightest flaring of the fireball. This is a at-long-last well-established effect of plasma-generated radio noise coupling into near-observer physical objects and creating a hissing or whooshing sound. It occurs simo with the visual flares, seems to come from 'all around' [not from above], has been reported for centuries by some bright fireball witnesses and pooh-poohed by scientists until work by Colin Keay and others established its validity.
Can you post a link to that video? The shortest I've seen yet was still over 2 minutes.
... 'Метеорит. Коркино.' Car DVR recording was made. Recording been mounting. But the gap can be calculated from the timestamp in the bottom left corner. 43:05 flash, 44:34 shock wave.
And amazingly - the shock effect is quite mild
Quote from: 360-180 on 02/17/2013 01:51 pm... 'Метеорит. Коркино.' Car DVR recording was made. Recording been mounting. But the gap can be calculated from the timestamp in the bottom left corner. 43:05 flash, 44:34 shock wave. Thanks a lot!! This looks authentic. Moreover, from shades movement it was VERY close to epicenter, the source of light is moving right overhead. And amazingly - the shock effect is quite mild, it was barely able to shake off some show from roofs and no damage at all. I'll pass this video to my students, we will look more into this.Thanks.
Quote from: JimO on 02/17/2013 01:28 pmI would also be very interested in eyewitness reports of electrophonic sound PRIOR to the acoustic shock -- that is, during the brightest flaring of the fireball. This is a at-long-last well-established effect of plasma-generated radio noise coupling into near-observer physical objects and creating a hissing or whooshing sound. It occurs simo with the visual flares, seems to come from 'all around' [not from above], has been reported for centuries by some bright fireball witnesses and pooh-poohed by scientists until work by Colin Keay and others established its validity. Thanks for the "learn something new every day" comment. I had not known of this.
Quote from: ugordan on 02/17/2013 01:42 pm Can you post a link to that video? The shortest I've seen yet was still over 2 minutes. 'Метеорит. Коркино.' Car DVR recording was made. Recording been mounting. But the gap can be calculated from the timestamp in the bottom left corner. 43:05 flash, 44:34 shock wave.
...What difference would it have made if it was made of iron? Might have not fragmented as easily and hence carried more of its energy downrange...
The meteorite that caused devastation in the Urals on Friday could have struck Britain if it had entered the atmosphere at only a slightly different time of day, astronomers revealed yesterday.The region around Chelyabinsk hit by the meteorite impact is 55 degrees north, the same latitude as northern England. Had the meteorite's timing been only few hours different, it could have caused widespread damage in the British Isles, astronomers at the University of Hawaii said yesterday.
Many videos seem to show that there was twin contrail from the beginning of reentry. Weird?