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A possible impact crater for the 1908 Tunguska Event
Terra Nova ^ | 7/01/2007 | Terra Nova

Posted on 06/22/2007 11:46:00 AM PDT by Mike Darancette

The so-called ‘Tunguska Event’ refers to a major explosion that occurred on 30 June 1908 in the Tunguska region of Siberia, causing the destruction of over 2000 km2 of taiga, globally detected pressure and seismic waves, and bright luminescence in the night skies of Europe and Central Asia, combined with other unusual phenomena. The ‘Tunguska Event’ may be related to the impact with the Earth of a cosmic body that exploded about 5–10 km above ground, releasing in the atmosphere 10–15 Mton of energy. Fragments of the impacting body have never been found, and its nature (comet or asteroid) is still a matter of debate. We report results from the investigation of Lake Cheko, located 8 km NNW of the inferred explosion epicenter. Its funnel-like bottom morphology and the structure of its sedimentary deposits, revealed by acoustic imagery and direct sampling, all suggest that the lake fills an impact crater. Lake Cheko may have formed due to a secondary impact onto alluvial swampy ground; the size and shape of the crater may have been affected by the nature of the ground and by impact-related melting and degassing of a permafrost layer. -snip-

(Excerpt) Read more at blackwell-synergy.com ...


TOPICS: News/Current Events
KEYWORDS: bfr; catastrophism; comets; lakecheko; russia; siberia; tunguska
Looking at the picture I'm surprised that this was not hypothesized sooner.
1 posted on 06/22/2007 11:46:01 AM PDT by Mike Darancette
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To: blam

PING


2 posted on 06/22/2007 11:46:34 AM PDT by Mike Darancette (Democrat Happens!)
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To: Mike Darancette


3 posted on 06/22/2007 11:49:28 AM PDT by Virginia Ridgerunner ("Si vis pacem para bellum")
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To: Mike Darancette

Coooool.


4 posted on 06/22/2007 11:51:10 AM PDT by El Sordo
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To: Mike Darancette

” Lake Cheko may have formed due to a secondary impact onto alluvial swampy ground “

Aha! Now we know where the Golgafrinchians landed.

http://www.nostalgiacentral.com/tv/comedy/hitchhikers.htm


5 posted on 06/22/2007 11:52:48 AM PDT by Redcitizen (Grond! Grond! Grond!)
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To: Mike Darancette
It has, one of the science channels did a show on it, they hypothesized about that lake and took samples from it years ago. I think the majority consensus was a comet made up of smaller stones and ice that exploded, causing a huge bang but not a lot of large debris laying around.
6 posted on 06/22/2007 11:53:10 AM PDT by Abathar (Proudly catching hell for posting without reading the article since 2004)
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To: Mike Darancette; SunkenCiv

Catastrophism ping?


7 posted on 06/22/2007 11:54:39 AM PDT by BJClinton (Jimmy Carter: the Renaissance Man of incompetence)
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To: Mike Darancette
There was a Russian geologist who theorized something very close, believing that the remains of the asteroid or meteor broke up into several pieces, drove into the earth, and that permafrost etc melted enough to create swamps in an already swampy land. He was researching for several years, but volunteered when Germany invaded, and was captured and died in a prison camp.
Learned that on History channel, but i forget his name.
8 posted on 06/22/2007 11:57:20 AM PDT by theDentist (Qwerty ergo typo : I type, therefore I misspelll.)
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To: Mike Darancette
an artist's rendition of what may have caused the impact...


9 posted on 06/22/2007 12:00:03 PM PDT by Andonius_99 (There are two sides to every issue. One is right, the other is wrong; but the middle is always evil.)
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To: Mike Darancette
I get a "cookie error" when I click on link. I'll try IE. Same absent cookie.

Oh well, I guess it has been there for almost 100 years. It'll still be there later.

10 posted on 06/22/2007 12:05:38 PM PDT by BallyBill (Serial Hit-N-Run poster)
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To: Mike Darancette

11 posted on 06/22/2007 12:07:17 PM PDT by JRios1968 (Faith is not believing that God can. It is knowing that God will. - Ben Stein)
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To: BallyBill

Not so sure I’d recommend eating it, tho.


12 posted on 06/22/2007 12:07:51 PM PDT by Cletus.D.Yokel (Mustard, in all its forms, is the true "ground meat" condiment.)
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To: BJClinton; 75thOVI; AFPhys; Alice in Wonderland; AndrewC; aristotleman; Avoiding_Sulla; ...
Thanks BJClinton for the ping.
 
Catastrophism
 
· join · view topics · view or post blog · bookmark · post new topic ·

13 posted on 06/22/2007 12:24:37 PM PDT by SunkenCiv (Time heals all wounds, particularly when they're not yours. Profile updated June 20, 2007.)
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To: BallyBill

http://www.blackwell-synergy.com/doi/full/10.1111/j.1365-3121.2007.00742.x?prevSearch=allfield%3A%28Tunguska%29


14 posted on 06/22/2007 12:59:46 PM PDT by faq
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To: SunkenCiv

There is growing evidence that electrical activity in the cosmos is more important than gravity in defining how bodies in space interact. The Tsunguska meteor/comet may well have accumulated enough charge in its route to Siberia to cause an electrical discharge (lightning bolt) immense enough to nearly vaporize the puppy, knock down a lot of trees and create a crater with discharge rilles, probably much closer to the ground than the 10 or so kilometers high that is usually quoted.

Why astronomers still refer to comets as “dirty snowballs” is beyond reason. It has been definitively shown via satellite photographs and impact experiments, that comets are very solid with almost zero water content. Orthodox astronomers invented the snowball canard in order to explain comet tails as the evaporation of ice, basically a steam trail.

Now that it is known that comets are in fact meteors, a new theory of comet tail propagation is necessary, one that includes electrical arcing and cratering of the meteor’s surface as its charge potential is changed while moving closer to the Sun’s and through the Sun’s electro-magnetic field.

Ref: www.holoscience.com , www.thunderbolts.info , www.knowledge.co.uk/sis/silver/thornhll.htm , http://video.google.com/videoplay?docid=4773590301316220374 , http://www.plasmacosmology.net/electric.html

Yollopoliuhqui


15 posted on 06/22/2007 1:02:55 PM PDT by Yollopoliuhqui (Enough with the "Dirty Snowball" Canard)
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To: Mike Darancette

First time I’ve hear this, and it may solve a long-time mystery. This should get more geological studies to the area funded.


16 posted on 06/22/2007 1:16:28 PM PDT by KingLiberty (As 12th Imam I declare 'Give me liberty or give me. . . twins would be nice.')
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To: Mike Darancette
"You just have been a participant in the biggest interdimensional cross-rip since the Tunguska blast of 1909!"


17 posted on 06/22/2007 1:26:42 PM PDT by NYFreeper
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To: Andonius_99

a huge kinetic bomb of explosive adiposity..


18 posted on 06/22/2007 1:29:38 PM PDT by sheik yerbouty ( Make America and the world a jihad free zone!)
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To: BallyBill
I get a "cookie error" when I click on link. I'll try IE. Same absent cookie.

Try this

19 posted on 06/22/2007 1:59:21 PM PDT by Grut
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To: Mike Darancette
"Cheko, a small lake located 8 km from the alleged epicentre of the 1908 Tunguska Event, has an unusual funnel-like bottom morphology, with ~50 m maximum water-depth near the center and a 0.16 depth-to-diameter ratio.

...A prominent reflector observed in seismic reflection profiles ~10 m below the bottom at the center of the lake indicates a sharp density/velocity contrast, compatible with either the presence of a fragment of the body, or of material compacted by the impact. Drilling could solve this dilemma."

Nice summary.

20 posted on 06/22/2007 2:03:23 PM PDT by the final gentleman
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To: Yollopoliuhqui

Not a lot of progress in that discipline. If they can link it to Global Warming they might electrically attract Algore.


21 posted on 06/22/2007 2:07:03 PM PDT by RightWhale (Repeal the Treaty)
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To: Andonius_99

now that is sicko


22 posted on 06/22/2007 2:22:54 PM PDT by reefdiver (The sheriff of Nottingham collected taxes on behalf of the common good)
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To: Yollopoliuhqui

This is just a layman’s notion, but if the Tunguska projectile were a comet consisting mainly of frozen water, could the explosion that occurred be the result of air friction bringing that mass of water to a sudden, violent boil?


23 posted on 06/22/2007 2:51:39 PM PDT by elcid1970
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To: elcid1970

Actually scientific belief at the moment is it was a stony asteroid that exploded in midair, not a comet.


24 posted on 06/22/2007 3:57:01 PM PDT by Strategerist
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To: Yollopoliuhqui; Swordmaker; Fred Nerks

Thanks Yollopoliuhqui.

http://www.freerepublic.com/focus/f-news/1854726/posts?page=15#15


25 posted on 06/23/2007 7:31:57 AM PDT by SunkenCiv (Time heals all wounds, particularly when they're not yours. Profile updated June 20, 2007.)
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To: SunkenCiv; Yollopoliuhqui
Google Earth:

60.963978 101.860021

Beautiful, once you realize you’re zooming in on ice, not cloud cover...but about 20 degrees too far north for my tastes.

And also about 180 degrees wrong both politically & longitudinally.

26 posted on 06/23/2007 9:29:23 PM PDT by ApplegateRanch (Islam: a Satanically Transmitted Disease, spread by unprotected intimate contact with the Koranus.)
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