INCOMING!: метеорита в Челябинске, Russian Meteor - February 2013 |
INCOMING!: метеорита в Челябинске, Russian Meteor - February 2013 |
Feb 15 2013, 07:01 AM
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Senior Member Group: Moderator Posts: 3241 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!
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Feb 18 2013, 09:25 PM
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Member Group: Members Posts: 198 Joined: 2-March 05 From: Richmond, VA USA Member No.: 181 |
What kind of confidence is reasonable with the infrasound estimates of the airburst? On a similar note, does anyone have a cold-war era air-burst calculator (such as http://calculating.wordpress.com/2012/05/0...computer-no-1/) to see what effects a 500kT explosion at ~85,000ft would have at various ranges?
Part of my reason for asking is that given the approximations from Collins et al (http://impact.ese.ic.ac.uk/ImpactEffects/effects.pdf), a larger blast seems necessary to produce the observed ground effects (assuming I am not making some bonehead mistake(s), which might not be a safe assumption ). Using the most recent published numbers, I get: http://impact.ese.ic.ac.uk/cgi-bin/crater....&tdens=2500 ... while the following seems to reproduce the knows better (using http://ogleearth.com/2013/02/reconstructin...gh-school-math/ and http://www.youtube.com/watch?v=gQ6Pa5Pv_io...player_embedded as references): http://impact.ese.ic.ac.uk/cgi-bin/crater....&tdens=2500 Thoughts? -- Pertinax |
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