A Sound Wave Followed As the Meteor Hits Russia, Say Researchers

RussiaScientists have received maiden clues over the greatest cosmic intruders when the meteor struck the south-western part of Russia.

When the explosion took place in steppes of Russia, especially over Chelyabinsk on February 15, it produced a sound which carried a frequency less than the range of human hearing. It hinted the presence of a new cosmic intruder. The wave was heard for approximately 32 seconds. Scientists measured the energy of the blast at between 450 and 500 kilotons. This is equivalent to the size of about 30 early nuclear bombs.

Bill Cooke, head of NASA's Meteoroid Environment Office said that the beginning of the object was on Mars and Jupiter. There were traces of nickel and iron in it.

The observations have come from the international agency that observes nuclear bomb tests. Even Comprehensive Test Ban Treaty Organization confirmed the presence of an intruder as it showed up on the detectors placed in the region between Greenland and Antarctica.

Margaret Campbell-Brown, an astronomer at Canada's University of Western Ontario explained that the sound obtained was used to measure the size of the asteroid that made a small shave with the earth. According to Brown, "In terms of things we have observed, this is the largest since Tunguska".

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