[meteorite-list] Small fragments of meteorite on ice in lake?

From: bandk chorus.net <bandk_at_meteoritecentral.com>
Date: Sat, 16 Feb 2013 00:08:12 -0600
Message-ID: <CAGCJ70TuBgdRiPzxHAF-oa4iAEDUqgQBZ6F6Gs6kaxc+QWwaYw_at_mail.gmail.com>

But---why would the hole in the ice be almost perfectly
circular----isn't that a bit strange---orn am I

On Sat, Feb 16, 2013 at 12:00 AM, Robin Whittle <rw at firstpr.com.au> wrote:
> This page:
>
> http://www.abc.net.au/news/2013-02-15/russians-panic-as-meteor-shower-rains-down/4521958
>
> http://www.abc.net.au/news/image/4522768-3x2-940x627.jpg
>
> has a photo of small black fragments ~12mm across on the ice, presumably
> near the hole in the lake: "A ruler is used to examine fragments said by
> the Interior Ministry to be from the meteor (Reuters: Chelyabinsk region
> Interior Ministry)".
>
> Using Google image search I haven't found any other source of this photo.
>
> I assume this is the same hole as depicted here:
>
> http://rt.com/news/scientists-explain-chelyabinsk-bolide-337/
>
> "A Russian policeman works near an ice hole, said by the Interior
> Ministry department for Chelyabinsk region to be the point of impact of
> a meteor seen earlier in the Urals region, at lake Chebarkul some 80
> kilometers (50 miles) west of Chelyabinsk February 15, 2013 (Reuters /
> Chelyabinsk region Interior Ministry)"
>
> This page also shows weather satellite images of the meteor.
>
> I haven't seen any more details about the zinc warehouse which was
> severely damaged. A widely circulated photo shows a cloud of grey smoke
> from inside the factory, which would not seem to be consistent with the
> idea that the wall was simply blown down by the shockwave from
> appoximately above. However, I think this was in Chelyabinsk, and I
> understand the main or only path of the meteor was many km above this
> area, so it seems unlikely that a fragment would have hit the ground there.
>
> Lake Chebarkul is about 70km west and a little south of Chelyabinsk:
>
> https://maps.google.com/maps?q=Lake+Chebarkul&hl=en&ll=55.044942,60.395622&spn=0.15205,0.271912&geocode=+&t=h&z=12
>
> I haven't yet seen a map of the trajectory.
>
> Here are two attempts at making such a map based on a weather satellite
> image, though it is not clear that they have corrected for parallax:
>
>
> http://attivissimo.blogspot.ch/2013/02/russian-meteor-path-plotted-in-google.html
>
> http://www.flickr.com/photos/hurizen/8475727383/
>
> I guess the image only shows the initial part of the smoke trail or
> light, since it seems the meteor went pretty much over the city of
> Chelyabinsk. If so, then this track would go roughly westwards and a
> little to the south, towards Miass, which would take it over the Lake
> Chebarkul area.
>
> - Robin
>
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Received on Sat 16 Feb 2013 01:08:12 AM PST