[meteorite-list] More exact information about the norwegian fall

From: Bjorn Sorheim <astrogeo_at_meteoritecentral.com>
Date: Wed Jun 14 17:27:37 2006
Message-ID: <6.2.1.2.2.20060614231503.043fc1f8_at_pop.online.no>

Hello Chris,
I just checked some weather charts from that day and time.
It seems at ground level there would be not much more than
5 m/s from southwest blowing at the outskirts of a Low
near Jan Mayen in the Northermost Atlantic.

With winds aloft I have no experience. Any easy way to come up
with a wind profile for that location and time, that is up to 30 k m?

I see on the best meteor photos of this event, that there is a thin line
going completly straight out forward of the big event. Meaning those
particles that
survived continued without retardation. (There seems also to be a small event
forward of the big one.)
Wouldn't that mean in this and in the general case that some travel (forward
(would like to know the average) is the norm?

Bj?rn S?rheim

At 20:51 14.06.2006, you wrote:
>Hi Bjorn-
>
>A strewn field need not be forward of the retardation point at all. You
>need to look at the wind conditions, since that is very important in
>determining the fall zone. In the absence of other information, the best
>place to start searching is directly under the retardation point (or under
>any disruption events). Reports of sound are very useful- when you have
>found an area with many witnesses to sound, there's a good chance you are
>also near any possible fall zone.
>
>Chris
>
>*****************************************
>Chris L Peterson
>Cloudbait Observatory
>http://www.cloudbait.com
>
>
>----- Original Message ----- From: "Bjorn Sorheim" <astrogeo_at_online.no>
>To: <meteorite-list_at_meteoritecentral.com>
>Sent: Wednesday, June 14, 2006 8:29 AM
>Subject: [meteorite-list] More exact information about the norwegian fall
>
>
>List,
>I have tried getting more exact information on this fall.
>In Norway any more exact info has not come out in the last days as far
>as I know. Partly this is because the first sensational rush has died down,
>and there is no reason to believe a Hiroshima explosion or anything
>aproximating
>that took place. Neither, as I write in another post, is an impact point or
>crater/scar
>found. The astromomers/scientist involved is not letting out more
>information right know. They are probably considering what to do, or maybe
>considereing just waiting to see if anything more pops up.
>
>Personally I have been gathering information about this event using the
>best info I can find.
>
>I will put out some preliminary results, just to get this case in a more
>sensible
>direction:
>
>I have found an endpoint height using the local witness information and photos
> (this is all my work):
>
>Endpoint (Hemmungspunkt): 27.8 km (quite certain)
>Inclination (quite uncertain) : near 45 degrees
>Coming from direction : W through N to E
>
>Visible in an area of over 400 km.
>Sounds (explosions etc.) for about 100 km , possibly more.
>Sounded like a canon, rifle shot, thunder. As known, many was awaken
>by the sounds, hypersonic bang/explosion in the North Reisadalen area.
>Light phenomena: Even though there was a midnight sun low in the north, the
>meteor lit up the mountains and landscape, it was like a white lightning.
>The fireball was red in color and was fragmenting.
>Only two persons has come out in the media with photos.
>There seems to be no video. A bit unfortunately these two persons
>are placed just a few km from each other and around 60 to 80 km
>from the explosion.
>
>So I wonder what the list make out of these more precise facts?
>
>One question I have: How much further from the retardation point (end
>point) in km
>would the pieces travel given the numbers above?
>
>Bj?rn S?rheim,
>in Norway
>
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Received on Wed 14 Jun 2006 05:27:16 PM PDT