[meteorite-list] Chelyabinsk at White House today

From: Pict <pict_at_meteoritecentral.com>
Date: Mon, 25 Mar 2013 21:24:20 -0700
Message-ID: <CD766EF0.15B20%pict_at_pict.co.uk>

With the shot of the corridor 3 minutes in on the video at
http://www.youtube.com/watch?v=RznHQKjWBSA there is an interval of around
2 Min 24 sec according to the video time signature. Note there is footage
edited out between the flash and the bang. Assuming an average speed of
sound as around 320 m/sec that would be 46 km distant.
I'd guess you'd need similar data from 2 other locations to triangulate an
altitude estimate for the explosion.
An analysis of the shadow tracks is likely a more accurate route to the
answer.
Regards,
John

On 25/03/2013 21:31, "Don Merchant" <dmerchan at rochester.rr.com> wrote:

>Really interesting video. I did notice that when the major
>flashes/bursts/explosions of the meteorite ends, it takes aproxamentally
>11
>seconds for the shock wave to hit. Any geniuses out there able to get a
>rough idea how far or high in the sky the meteorite was when it exploded?
>Sincerely
>Don Merchant
>----- Original Message -----
>From: "Galactic Stone & Ironworks" <meteoritemike at gmail.com>
>To: "Michael Farmer" <mike at meteoriteguy.com>
>Cc: <meteorite-list at meteoritecentral.com>
>Sent: Monday, March 25, 2013 9:11 PM
>Subject: Re: [meteorite-list] Chelyabinsk at White House today
>
>
>> Has there been any update on the woman who suffered a broken back from
>> the event?
>>
>>
>>
>> On 3/25/13, Michael Farmer <mike at meteoriteguy.com> wrote:
>>> I was just in Chelyabinsk, a city under emergency for the last month,
>>>-20
>>> and tens of thousands of windows blown out, not only glass, but entire
>>> walls
>>> of many buildings caved in, entire buildings collapsed, and more than
>>> 1500
>>> wounded, some still in the hospital, and that was just a meteorite
>>> passing
>>> overhead 30 miles high.
>>> Are you telling me that those hundreds of thousands of stones,
>>>doubtless
>>> many weighing tons, would not have killed thousands or destroyed
>>>hundreds
>>> of
>>> buildings if it had directly impacted the city at a high angle? I
>>>think
>>> the
>>> damage would have been catastrophic and the death toll in the
>>>thousands.
>>>
>>>
>>> Michael Farmer
>>>
>>> Sent from my iPad
>>>
>>> On Mar 25, 2013, at 6:08 PM, Chris Peterson <clp at alumni.caltech.edu>
>>> wrote:
>>>
>>>> It's extremely doubtful that this body could have done all that much
>>>> more
>>>> damage. It simply wasn't big enough, or strong enough. A little
>>>>steeper
>>>> (or just as likely, as little shallower), a little earlier or later,
>>>> probably wouldn't have made much difference.
>>>>
>>>> While I'd love to see a constellation of IR space telescopes looking
>>>>for
>>>> asteroids in this size range, realistically there's probably nothing
>>>>we
>>>> could do if we found one, and as a matter of public policy, the money
>>>> might well be considered poorly spent.
>>>>
>>>> The reality is that the actual risk to human life and property from
>>>> small
>>>> asteroids is absurdly small compared to a large number of other things
>>>> that we actually have some control over.
>>>>
>>>> Chris
>>>>
>>>> *******************************
>>>> Chris L Peterson
>>>> Cloudbait Observatory
>>>> http://www.cloudbait.com
>>>>
>>>> On 3/25/2013 3:15 PM, Michael Farmer wrote:
>>>>> Congratulations to Dante Lauretta of UOfA Lunar and Planetary
>>>>> Laboratory
>>>>> and Osiris-Rex mission, who presented a piece of Chelyabinsk that I
>>>>> donated, to President Obama and Congress today while there to
>>>>>discuss
>>>>> the
>>>>> threat of asteroid impact.
>>>>>
>>>>> Chelyabinsk was almost a "City Killer" as Richard Kowalski told me
>>>>> yesterday, had it come in a few second earlier and steeper angle, a
>>>>> million people in Chelyabinsk would likely be dead today.
>>>>> Time to take meteorites serious.
>>>>>
>>>>> Michael Farmer
>>>>
>>>> ______________________________________________
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>>
>>
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Received on Tue 26 Mar 2013 12:24:20 AM PDT