Analysis on the Seismic Data of the Lanzhou Meteorite Falling in Dec. 11, 2004
RONG Dai-lu,ZHANG Yuan-sheng,LI Ya-rong (The Earthquake Institute of Lanzhou, CEA, Lanzhou 730000,China)
The falling process of Lanzhou meteorite in Dec. 11, 2004 is conversed and analyzed using the seismic data recorded by the Lanzhou temporal digital network set by Seismological Bureau of Gansu Province. The results show that the meteorite came into the sky above Lanzhou through 26 km high at 23:36:23 in Dec. 11, 2004, and a small explosion occurred, then the fireball fell down towards to the north-east direction, arrived its endpoint and exploded and disjointed into small ones at 23:36:42 at 13 km high. No big ones fell down to the ground.