(meteorobs) Question on the characteristics of the 811 Fireball.

[stange34 at sbcglobal.net]

That has not been determined accurately & made public yet.

----- Original Message ----- 
From: "Debbe Smith" <dripingpink at yahoo.com>
To: "Global Meteor Observing Forum" <meteorobs at meteorobs.org>
Sent: 2007/08/16 21:53
Subject: Re: (meteorobs) Question on the characteristics of the 811 
Fireball.


> thank you for your reply. Where was the actual landing because it sure 
> seemed to land in my creek bed but can find nothing
>
> stange34 at sbcglobal.net wrote:  811 seems to be an appropriate way to 
> describe that fireball.
>
> This fireball exhibited two massive flares or "bursts" of light as it went 
> behind my distant horizon of small trees. A core of light was visible 
> behind the tree bases throughout that period of partial light shielding by 
> the trees.
>
> I was fortunate to be actually looking at the all-sky (real-time) TV 
> monitor as the Fireball first appeared and began its visible approach to 
> the earth. To the eye, the fireball had TWO massive light explosions or 
> flare ups by the end of the event.
>
> Going over the frames of the video (3194 to 3224) that had captured the 
> same event, frame number 3217 shows the fireball between TWO explosive 
> points that are located between frame 3216 & 3218.
>
> The frame period is closely 1/30th second. The beginning period between 
> the the two explosions is 1/15th second.... which is the shortest time 
> period before the eye integrates light pulses into a steady state. This 
> corrobrates what was seen with what was recorded on the .avi video.
>
> QUESTION: -Are TWO aerial explosions characteristic of low level 
> fireballs? Or do we have the possibility of a small impact too?
>
> Most, if not all, of the Seismographs located near Sacramento & the 
> Sierra's are strong-motion types designed to measure structure flexure vs 
> ground mount references.
>
> YCSentinel
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