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For the first time, a double impact crater was found on Earth

The craters in western Sweden were created as a result of the impact of two meteorites at the same time 458 million years ago * At that time, the Earth suffered many meteorite impacts from fragments created by the collision of two large asteroids

Illustration of the meteorite impact that caused the unique double crater in Sweden. Credit: Don Dixon/Erik Sturkell/University of Gothenburg
Illustration of the meteorite impact that caused the unique double crater in Sweden. Credit: Don Dixon/Erik Sturkell/University of Gothenburg

 

Researchers from the University of Gothenburg in Sweden discovered traces of two meteorite impact craters in northern Sweden. The double impact of the rocks from space happened 458 million years ago. This is the impact of a particularly large rock that created a crater with a diameter of 7.5 kilometers, while the second impact created a much smaller crater.

"The two impacts occurred simultaneously 458 million years ago and created the two craters" says Eric Sturkel, professor of geophysics at the University of Gothenburg. "Such a double impact is not a common phenomenon, in fact this is the first time that a double impact has been proven on Earth." Storkel said.

The craters are near the town of Brunsflo, which is about 20 kilometers south of the city of Östersund in northern Sweden. It is a huge crater with a diameter of 7.5 kilometers while the second crater is 16 kilometers away from the first and has a diameter of 700 meters.

Jumatland was at the time under sea water, at a depth of 500 meters at the point where the two meteorites hit at the same time.
"The data from excavations we performed showed that the same soil sequence is found in both craters and the sediments above the impact layer are of the same age. In other words, this is proof that it is a simultaneous injury" says Storkel.

The impact caused the area to be emptied of the sea water that covered it at the time of the impact, and for 100 seconds these pits were completely dry. After that, the sea water came back and covered the area, and swept away with them additional fragments of the meteorites mixed with material emitted during the explosion and material torn from the sea floor by the huge tsunami waves.

 

The age of meteorites

The two meteorites that hit the earth about 458 million years ago are not the only ones that hit at that time. "About 470 million years ago, two large asteroids in the asteroid belt between Mars and Jupiter collided with each other and many pieces of them were thrown into new orbits. Many of them have crashed on Earth like the two discovered in Bitaland, Sturkel says.

to the notice of the researchers

 

More of the topic in Hayadan:

6 תגובות

  1. Rami If the craters were created by a meteor impact, then all that is needed is not to write a scientific thesis, it is simply to look for the center of the impact and find stones or materials that match the materials found in meteors

    The problem with your theory is that the shape does not correspond to the impact of a meteor, one is a circle and the other is an oval, so if it was the same meteor that disintegrated we should have seen the same shape

  2. In my opinion (and contrary to the accepted opinion) this is how the craters were initially formed in our country in Jordan, Ein El Basha and Sinai. The same angle of impact of a comet or a disintegrated meteorite. In Jordan it is a little to the north due to the movement of the Arabian Plate to the left. I wrote a thesis at the time about not being accepted. The day will come that my opinion will be accepted, maybe not even in my time....Happy New Year

  3. Indeed, Shoemaker Levi 9 broke up into at least nine parts and these hit Jupiter one after the other in 1994.
    Presumably this asteroid also broke up near Earth. The researchers claim that this asteroid was a fragment blown off by an asteroid collision in the asteroid belt. Apparently there are additional strikes dating back to that period. They also claim that the site of the strike was 500 meters below sea level - and that the astronauts completely "dried" the signal of the area at the time of the strike. It is definitely a spectacle that was worth seeing - but not too close.

  4. Maybe this is one asteroid that disintegrated shortly before the impact into two separate blocks? It doesn't sound like such a rare event to me, I remember that the famous asteroid that collided with Mars at the time also disintegrated shortly before the impact into several lumps.

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