Welcome to DU!
The truly grassroots left-of-center political community where regular people, not algorithms, drive the discussions and set the standards.
Join the community:
Create a free account
Support DU (and get rid of ads!):
Become a Star Member
Latest Breaking News
General Discussion
The DU Lounge
All Forums
Issue Forums
Culture Forums
Alliance Forums
Region Forums
Support Forums
Help & Search
General Discussion
In reply to the discussion: Chelyabinsk Meteor Shines Light on What May Be the Most Contaminated Place on Earth [View all]Octafish
(55,745 posts)34. The last time something similar happened was just down the road in Tunguska...
Meteor Is Not Siberia's First Brush With Objects Falling From Space
By HENRY FOUNTAIN
The New York Times
Published: February 15, 2013
The apparent explosion of a small meteor over Siberia early on Friday was not the first time that that part of the world has had a too-close encounter with a space rock. The region was the scene of what is believed to be the largest space-related explosion in human history, 105 years ago.
The Tunguska Event, as it is known, occurred the morning of June 30, 1908, in a largely uninhabited forested area near the Podkamennaya Tunguska River in central Siberia. The site is about 1,200 miles northeast of Chelyabinsk, the Siberian city where some of the damage and injuries occurred Friday.
Scientists believe that an asteroid was the culprit, traveling in a northwesterly direction and exploding at the altitude of a jetliner, about five miles. Various estimates of the size of the object have been calculated over the years; recent calculations suggest it was relatively small, perhaps less than 100 feet in diameter. It's been estimated that the explosion was as powerful as a medium-sized hydrogen bomb, and at least several hundred times more powerful than the atomic bomb that was dropped on Hiroshima.
The airburst flattened tens of millions of trees over an area of about 800 square miles. Among the few eyewitness accounts there were reports of windows breaking and trees snapping 40 miles away. There are no accounts of injuries.
Field expeditions in the remote area in the 1950s and '60s determined from the direction of tree falls the precise location of the blast. The pattern of destruction on the ground was irregular, with fewer trees flattened in front of the blast site and more to the sides. Experiments in the 1960s showed that this was due to the interaction of two shock waves: one caused by the flight of the object, the other by the explosion itself.
CONTINUED...
http://mobile.nytimes.com/2013/02/15/science/meteor-not-siberias-first-brush-with-falling-space.xml
By HENRY FOUNTAIN
The New York Times
Published: February 15, 2013
The apparent explosion of a small meteor over Siberia early on Friday was not the first time that that part of the world has had a too-close encounter with a space rock. The region was the scene of what is believed to be the largest space-related explosion in human history, 105 years ago.
The Tunguska Event, as it is known, occurred the morning of June 30, 1908, in a largely uninhabited forested area near the Podkamennaya Tunguska River in central Siberia. The site is about 1,200 miles northeast of Chelyabinsk, the Siberian city where some of the damage and injuries occurred Friday.
Scientists believe that an asteroid was the culprit, traveling in a northwesterly direction and exploding at the altitude of a jetliner, about five miles. Various estimates of the size of the object have been calculated over the years; recent calculations suggest it was relatively small, perhaps less than 100 feet in diameter. It's been estimated that the explosion was as powerful as a medium-sized hydrogen bomb, and at least several hundred times more powerful than the atomic bomb that was dropped on Hiroshima.
The airburst flattened tens of millions of trees over an area of about 800 square miles. Among the few eyewitness accounts there were reports of windows breaking and trees snapping 40 miles away. There are no accounts of injuries.
Field expeditions in the remote area in the 1950s and '60s determined from the direction of tree falls the precise location of the blast. The pattern of destruction on the ground was irregular, with fewer trees flattened in front of the blast site and more to the sides. Experiments in the 1960s showed that this was due to the interaction of two shock waves: one caused by the flight of the object, the other by the explosion itself.
CONTINUED...
http://mobile.nytimes.com/2013/02/15/science/meteor-not-siberias-first-brush-with-falling-space.xml
Edit history
Please sign in to view edit histories.
50 replies
= new reply since forum marked as read
Highlight:
NoneDon't highlight anything
5 newestHighlight 5 most recent replies
RecommendedHighlight replies with 5 or more recommendations
Chelyabinsk Meteor Shines Light on What May Be the Most Contaminated Place on Earth [View all]
Octafish
Feb 2013
OP
I used to think callousness towards citizens was limited to Communist counties.
dixiegrrrrl
Feb 2013
#18
The Golden Rule got warped by the Have-Mores into 'He Who Owns the Gold, Rules.'
Octafish
Feb 2013
#26
The last time something similar happened was just down the road in Tunguska...
Octafish
Feb 2013
#34
"The earth is an organism, and that organism has a skin; that skin has diseases...
alterfurz
Feb 2013
#31
Oliver Stone covers this in his "Untold History of the United States" series on HBO...
AntiFascist
Feb 2013
#25
They would have wanted to wear every ounce of extra-lead shielding they had on board.
Octafish
Feb 2013
#47
The oversight by the Soviet government was so extreme, doctors were not allowed to cite cancer as a
Mnemosyne
Feb 2013
#43
This information chills me to the bone. I never realized this property of plutonium, holy cow! I am
Mnemosyne
Feb 2013
#46