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Tunguska   contributed by Herbert Raab   MetBul Link

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30 June 1908. See Contributor comments.


     
  Bark

Herbert writes:
110 years ago, a large meteoroid (probably around 50 to 100 meters in diameter) entered the Earth's atmosphere over Siberia, and exploded some 5 to 10 kilometers above the ground, with a force of 10 to 30 megatons of TNT. The resulting air burst flattened some 2.000 kmē of dense forest.

Shown here is a full slice from a tree that survived the Tunguska event, with some burn marks (red arrow). This particular specimen was collected during the first Tunguska expedition in 1927, probably by Leonid Kulik himself.
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Photo 1

Found at the arrow (green or red) on the map below

 


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Daniel
 7/1/2018 10:02:07 AM
Thanks, very nice
Jorg-Florian Jensch
 6/30/2018 1:03:27 PM
Interesting and exciting material. Thank you for showing us.
Joe Gianninoto
 6/30/2018 10:17:53 AM
Thank you Herbert! Very very interesting
Matthias
 6/30/2018 3:39:23 AM
Great and rare document, Herbert. For me it even seems there to be readable the characteristical anomaly in density of the growing-rings after the event, at the side of the tree which obviously had been exposed to the forces of the Tunguska event, close to the "burning marks" (really caused by fire or not, difficult to say).
 

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