Here is an article about Australian researchers who no longer can get
government funding, and so are turning to crowdfunding to support their
expeditions. They claim to have found more than 20% of Australia's
recorded meteorites.
Here is a write-up of some interesting research.
- Robin
http://phys.org/news/2015-01-death-dynamo-hard-space.html
The researchers' magnetic measurements, supported by computer
simulations, demonstrate that the magnetic fields of these
asteroids were created by
Hi Bob,
You wrote, in part:
I also feel that the too-often-used phrase nothing made it to the
ground - it all burned-up is too ill-informed. How is it physically
possible for a cobble-pebble-sandgrain to continue traveling fast
enough to completely ablate down to total nothingness? It's my
Hi Ron,
Thanks for posting these most interesting articles:
http://www.culturekiosque.com/nouveau/news/permian_extinction_animal825.html
Meteorite Crater in Brazil Reveals Biggest Extinction In Earth History
By Culturekiosque Staff September 3, 2013
There is a site: The Cosmic Tusk - Abrupt climate change induced by
comets and asteroids during human history:
http://cosmictusk.com
which has some quotes from and discussion:
Here is a write-up:
http://phys.org/news/2013-08-evidence-cosmic-impact-younger-dryas.html
of an article:
Large Pt anomaly in the Greenland ice core points to a cataclysm at
the onset of Younger Dryas
Michail I. Petaeva, Shichun Huanga, Stein B. Jacobsena and
Alan Zindlera
The article:
http://www.nature.com/news/iron-in-egyptian-relics-came-from-space-1.13091
reports on an article behind a paywall:
Analysis of a prehistoric Egyptian iron bead with implications for
the use and perception of meteorite iron in ancient Egypt
Diane Johnson, Joyce Tyldesley,
Here are some press releases with photos:
http://www.uanews.org/story/ua-mars-camera-reveals-hundreds-of-impacts-each-year
http://www.jpl.nasa.gov/news/news.php?release=2013-162
The paper itself is behind a paywall:
http://www.sciencedirect.com/science/article/pii/S0019103513001693
Over
Hi Shawn,
Thanks very much for the videos. Here are my thoughts. I wish I could
be more enthusiastic about them. I stopped watching TV regularly in the
early 70s. With the exception of a handful of programs, not least The
Addams Family, I find it distractingly drawn out, full of extraneous
There's a detailed account of the second Japanese mission to visit an
asteroid and return samples:
http://www.spaceflightnow.com/news/n1303/27hayabusa2/
which will be similar to the first one:
http://en.wikipedia.org/wiki/Hayabusa
On 14th June 2010, my wife Tina and I happened to be
Hi Martin,
Thanks for this link:
source: http://rt.com/news/meteorite-rush-biggest-fragment-404/
in which someone commented:
Every 105 years? 1803 L'Aigle, 1908 Tungusta, 2013 Chelyabinsk, 2118?
Being a meteorite newbie I didn't recognise the first reference, but found:
Hi Steve,
A clearer view of the two main fireballs can be found at:
http://www.youtube.com/watch?v=gQ6Pa5Pv_io
I suggest switching to full-screen and starting the player at 4:30.
This is an animated GIF which goes back and forwards continually over
that part of the video, making the two
In addition to the article I mentioned in another message (Russian: A
preliminary reconstruction of the orbit of the Chelyabinsk Meteoroid
byJorge I. Zuluaga Ignacio Ferrin) here are some further updates of
interest from emails regarding Stefan Geens' site and other things I
found by following
Here is a video:
http://krasview.ru/video/342138-METEORIT_15_02_2013g_Chelyabinsk_Chel.obl._g.Emanjelinsk.
with the final part of entry clearly visible, and then with multiple
windows in a 5 storey building being blown in. This is taken with the
same dashboard camera. The 90 time delay can be
More from the email updates for Stefan Geens':
http://ogleearth.com/2013/02/reconstructing-the-chelyabinsk-meteors-path-with-google-earth-youtube-and-high-school-math/
followed by my rambling at the end.
People comment on the site but their comments are held in a moderation
queue and may only
Hi Bob,
Thanks for your appreciative message. I am just linking one from forum
to another, and writing about recent developments to the Columbian
researchers in case they haven't heard of them already.
Some folks called Serge and ssvilponis (presumably Sulev Svilponis in
Estonia) seem to be
From the email updates of Stefan Geens' site:
http://ogleearth.com/2013/02/reconstructing-the-chelyabinsk-meteors-path-with-google-earth-youtube-and-high-school-math
I learnt that a paper has been written regarding the entry path, working
back to possible orbits:
The researchers:
http://arxiv.org/abs/1302.5377
A preliminary reconstruction of the orbit of the Chelyabinsk
Meteoroid
Jorge I. Zuluaga, Ignacio Ferrin
Instituto de F´ısica - FCEN, Universidad de Antioquia,
Calle 67 No. 53-108, Medellın, Colombia
Did not know the precise
There's no mention of the exact location of this report:
http://www.bbc.co.uk/news/world-europe-21552923
Just look for the holes in the snow and start digging. The reporter
and crew found four fragments after just a few minutes digging in the
snow.
Boris Vasiliev holds an approximately 3 x 4
Here is my 3rd set of highlights from the emailed updates I get for:
http://ogleearth.com/2013/02/reconstructing-the-chelyabinsk-meteors-path-with-google-earth-youtube-and-high-school-math/
There's an extensive and apparently continually updated page:
Here are some more interesting items from the emailed updates I get for:
http://ogleearth.com/2013/02/reconstructing-the-chelyabinsk-meteors-path-with-google-earth-youtube-and-high-school-math/
Another view from the west, with exact coordinates:
http://www.youtube.com/watch?v=GiN1I2CK4gA
Hi Nick,
You may have found this list already. I haven't looked at it in detail:
http://www.webmasterworld.com/foo/4546400.htm
I learnt of this from email updates to the most interesting page:
From recent comments on this page, and responses by Stefan Geens:
http://ogleearth.com/2013/02/reconstructing-the-chelyabinsk-meteors-path-with-google-earth-youtube-and-high-school-math/
some Russians are on the case, using some additional videos:
Here are some of the more interesting updates for this page (I get them
by email):
http://ogleearth.com/2013/02/reconstructing-the-chelyabinsk-meteors-path-with-google-earth-youtube-and-high-school-math/
The Korkino video:
http://www.youtube.com/watch?v=odKjwrjIM-k
is taken from
The BBC article:
http://www.bbc.co.uk/news/world-europe-21494963
links to a Russian article:
http://en.rian.ru/russia/20130217/179531203/Meteorite-Fragments-Found-in-Icy-Urals-Lake---Scientists.html
We have just completed the study, we confirm that the
particulate matters, found by
A list member kindly pointed out that there was more than a few seconds
deleted from this video. I didn't look at the minutes figure.
The meteor is overhead at 43:06 and the shockwave arrives at 44.34.
So this puts the altitude about three times the 8.7km estimated by Bob
Matson. From:
88 seconds . . .
From:
http://en.wikipedia.org/wiki/Speed_of_sound#Altitude_variation_and_implications_for_atmospheric_acoustics
http://en.wikipedia.org/wiki/File:Comparison_US_standard_atmosphere_1962.svg
Sticking with the 310 metre/sec guesstimate of Bob Matson, 88 seconds
gives us 27.3
Following more links from the Wikipedia article:
http://en.wikipedia.org/wiki/2013_Russian_meteor_event
leads to an analysis of the trajectory of the meteor and how it differs
from that of 2012 DA14:
http://kaira.sgo.fi/2013/02/are-2012-da14-and-chelyabinsk-meteor.html
From a comment at
Here is a relatively little-watched video showing a 28 second time delay
after the meteor passes almost overhead, and slightly to the south:
http://www.youtube.com/watch?v=odKjwrjIM-k
I am not sure where this is located. With some work such as that of:
Looking at the comments at:
http://ogleearth.com/2013/02/reconstructing-the-chelyabinsk-meteors-path-with-google-earth-youtube-and-high-school-math/
This one is from Korkino, close to Rosa/Roza (54.890703,61.398983):
http://www.youtube.com/watch?v=odKjwrjIM-k
- Robin
Hi Rob,
Indeed 8.7km is low. I didn't do the calculations - I just wanted to
share with the folks on this list ASAP. This is about the elevation of
Mt Everest (Sagarmāthā). According to:
http://fiziknota.blogspot.com/2008/04/atmospheric-pressure-and-altitude.html
the air pressure there is
The Russia Today page has video of the light of the meteor throwing
moving shadows of buildings, in broad daylight.
http://rt.com/news/meteorite-crash-urals-chelyabinsk-283/
There is a report of 100 people being injured, none seriously, and two
photos of a zinc factory (maybe a galvanizing
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
Here is an interesting approach to calculating the trajectory by looking
at videos of moving shadows:
http://ogleearth.com/2013/02/reconstructing-the-chelyabinsk-meteors-path-with-google-earth-youtube-and-high-school-math/
These calculations by Stefan Geens (I am not a trained scientist) seem
to
According to:
http://www.bbc.co.uk/news/world-europe-21482252
Debris also reportedly fell on the west Siberian region of
Tyumen.
Governor Yurevich reported that a meteorite had landed in
a lake 1km outside Chebarkul, which has a population of 46,000.
A Russian army
Following on from my previous messages: a reference from the Wikipedia
article:
http://www.interfax-russia.ru/Ural/main.asp?id=381682
http://translate.google.com/translate?sl=rutl=enjs=nprev=_thl=enie=UTF-8eotf=1u=http%3A%2F%2Fwww.interfax-russia.ru%2FUral%2Fmain.asp%3Fid%3D381682
A 1,000 year-old ancient Buddhist statue which was first recovered by a
Nazi expedition in 1938 has been analysed by scientists and has been
found to be carved from a meteorite. The findings, published in
Meteoritics and Planetary Science, reveal the priceless statue to be a
rare ataxite class of
My wife Tina and I recently started our meteorite collection with an
inexpensive 12mg fragment of the 1950 Murray CM2 carbonaceous chondrite
meteorite, purchased from Peter Marmet via eBay:
http://myworld.ebay.com/pema9/ We have a Bausch Lomb stereo
microscope 7x to 30x, a good illuminator and a
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