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Today in Science: The Chelyabinsk Meteor | Human world



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Today, six years ago, a small asteroid with an estimated size of 20 meters penetrated the Earth's atmosphere. The asteroid on February 15, 2013 moved at a speed of 19 km / s (12 miles per second) as it hit the protective air blanket of our planet, which did its work and the asteroid exploded. The bright, hot explosion took place only about 30 km above the city of Chelyabinsk in Russia and contributed 20 to 30 times the energy of the atomic bomb Hiroshima. The shockwave broke windows and demolished parts of buildings in six Russian cities. Around 1

,500 people had to go to medical treatment for injuries mainly with flying glasses.

Large and small bodies from space are constantly impacting the Earth's atmosphere. The Nuclear Test Ban Treaty Organization, which operates a network of sensors that monitor the Earth 24/7 and pay attention to the infrasound signature of nuclear detonation, said it had measured 26 atomic-level asteroid impacts in the earth's atmosphere since 2014. 19659004] Nevertheless, the Russian Superbolid on 15 February 2013 was extremely powerful. It was later said that it was the strongest explosion caused by an asteroid since the Tunguska event, which in 1908 flattened a large forest area and killed reindeer in Siberia.

The Tunguska event took place in a sparsely populated part of Siberia. It remained a mystery to scientists at the beginning of the 20th century. In contrast, on February 15, 2013, dashboard cameras and amateur photographers took pictures of incoming meteors across much of Russia.

  Extremely bright ball in the sky with explosion behind the city street.

Bright fireball passing Russia on the morning of February 15, 2013. Scientists later said the meteor's light was brighter than the sun. It was visible up to a distance of 100 km.

  Long, bright cloud line over trees.

Chelyabinsk, Russia, left steam cloud trail conquered by M. Ahmetvaleev on February 15, 2013 Image via ESA.

After the explosion of the meteoro in 2013, residents and schoolchildren are said to have found meteorite fragments, many of which were in snowdrifts. An informal market was created for meteorite fragments.

Numerous small meteorites fell to areas west of Chelyabinsk, and within hours of the meteor's visual observation, a 6-m hole was discovered on the frozen surface of Chechesul Lake in the Russian Sea. Ural Federal University scientists collected 53 samples around the hole the same day.

In June 2013, Russian scientists reported further magnetic imaging studies below the location of the ice hole in Lake Chebarkul. They had identified a larger meteorite buried in sediments on the lake bed.

After several weeks of operation, on October 15, 2013, a large fragment of the meteorite was lifted from the bottom of Lake Chebarkul. It had a total mass of 1,642 pounds (654 kg) and is still the largest fragment found in the Chelyabinsk meteorite.

  People are standing around, two men are tugging at a large tarpaulin with a big black stone.

The most commonly discovered fragment of a Russian meteorite that was lifted via Voice of Russia from the bed of Lake Chebarkul in the Urals.

NASA satellites were also able to track the meteor cloud in the Earth's atmosphere. As the video below describes, they have been tracking and investigating the meteor cloud for months.

Conclusion: On February 15, 2013, a small asteroid produced a bright meteor over Russia that exploded over the city of Chelyabinsk.

Read more: Former Apollo astronaut Rusty Schweickart describes the meteor on 15 February 2013

  Deborah Byrd


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