6 March 2013
New Details about Chelyabinsk Meteorite Research
Scientists of Ural Federal University announced the preliminary results of the magnetometer survey conducted at Lake Chebarkul
On 28 February the team of UrFU Quantum Magnetometry lab constructed a map of the magnetic field on the site where the meteorite had crashed at Lake Chebarkul, Chelyabinsk region. To build this map they used magnetometer survey data.
“The preliminary analysis has shown that there are several magnetic field anomalies which can be caused by large meteorite fragments. At the moment we are conducting data interpretation and analysis”, says Evgeny Narkhov, a researcher from the UrFU laboratory. In future the magnetic field anomaly map will help scientists identify the possible location of large meteorite fragments. “If you look at the map, you see that meteorite is likely to have broken into pieces and on the bottom of the lake there are not small pieces and a large one, as you might think, but several large fragments”, Evgeny Narkhov adds.
According to the founder and longstanding leader of the UrFU meteorite expedition Viktor Grokhovsky, the meteorite which fell in the lake was 60 cm long and weighed about 100 kg. When it fell into the lake, it broke into several fragments.
The measurements were conducted with the help of high-precision magnitometers MMPOS, produced at the laboratory.
The magnitometer station was collecting data on the changes in the earth magnetic field. During the day researchers read magnetic field data on the area of 60 x 100 meters. As a result, they got measurements at 6,000 points, located within 1 m of each other. The researchers report that they had to work in severe weather conditions: the temperature was -20 °C and the wind gusted to 20 m/s.
Previously there was a 16-meter ice-hole found on the surface of the lake which is assumed to be a trace from the bolide. Near the lake the scientists also collected a certain substance whose origin they later identified as meteorite.
<media 16695>See the magnetic map of meteorite zone!</media>