INCOMING!: метеорита в Челябинске, Russian Meteor - February 2013 |
INCOMING!: метеорита в Челябинске, Russian Meteor - February 2013 |
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![]() Senior Member ![]() ![]() ![]() ![]() Group: Moderator Posts: 3234 Joined: 11-February 04 From: Tucson, AZ Member No.: 23 ![]() |
Looks like a small meteoroid decided to spoil 2012 DA14's big day by exploding over Russia...
http://zyalt.livejournal.com/722930.html?nojs=1 -------------------- &@^^!% Jim! I'm a geologist, not a physicist!
The Gish Bar Times - A Blog all about Jupiter's Moon Io |
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Senior Member ![]() ![]() ![]() ![]() Group: Members Posts: 2998 Joined: 30-October 04 Member No.: 105 ![]() |
Do we have any scale information on the cameras used to photograph the Russian bolide? Do we have any idea of the physical dimensions of the dust trail/debris trail (I don't think it's technically a contrail) I've looked at a lot of photographs and videos and I can't get a handle on how to scale the trail. My TLAR sense tells me that it's huge.
--Bill -------------------- |
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![]() Member ![]() ![]() ![]() Group: Members Posts: 404 Joined: 5-January 10 Member No.: 5161 ![]() |
...I've looked at a lot of photographs and videos and I can't get a handle on how to scale the trail. My TLAR sense tells me that it's huge. Check out this page for its scale: http://attivissimo.blogspot.ch/2013/02/rus...-in-google.htmlI attempted to scale it here. For what it's worth, I did a quick extraction of 6 sonic boom soundtracks of the meteor from YouTube to see if I could find some similarity between them, at least in the timing of the biggest booms. But nothing stood out as a clear match between any two of them, except for the initial boom, of course! Maybe if a bit more time were spent some similarities could be extracted. But no similarity in the timing and sequence of the booms stands out between any of them with a quick listening or when looking at first 11 seconds of their waveforms: Of course, there's some glass shattering or car alarms at the beginning of some of them, but some were taken with minimal background noise with the booms standing out. But no pattern. It sounds really different from each location. When all soundtracks play at once, it's a calamity – for the ears! Something that does stand out is that recordings made closest to the vapor trail almost sound like gunfire or quick and snappy fireworks booms; more distant ones sounded like thunder, "muffled" but still loud. |
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![]() Member ![]() ![]() ![]() Group: Members Posts: 723 Joined: 13-June 04 Member No.: 82 ![]() |
For what it's worth, I did a quick extraction of 6 sonic boom soundtracks of the meteor from YouTube to see if I could find some similarity between them, at least in the timing of the biggest booms. But nothing stood out as a clear match between any two of them, except for the initial boom, of course! Maybe if a bit more time were spent some similarities could be extracted. But no similarity in the timing and sequence of the booms stands out between any of them with a quick listening or when looking at first 11 seconds of their waveforms: This does not surprise me. Each individual explosion would have happened at a different location in the air, and hence would be a different distance from the listener, with the distance to each explosion varying with the listener's location. A given shock wave would change its time of arrival relative to that produced by a different explosion, even changing from being earlier to being later than the second shock wave, depending on the location of the listener. So the sequence of bangs and booms would be different at each location on the ground. |
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