THE SIGNIFICANCE OF TUOKETUO M_S4.2 EARTHQUAKE THAT OCCURRED ON JUN.10, 2003

The occurrence of Tuoketuo M_S4.2 earthquake on Jun.10, 2003 ended the seismic quietness (M_L≥3.0) that lasted for 45 months from Helinger M_S4.2 earthquake (Sep.12, 1999) in Huhhot area.After the earthquake, the small and medium earthquake in Huhhot-Baotou Basin is clearly active, but is still week in the neighboring Linhe Basin.Through analysis to the seismicity in Yinshan seismic zone, we predicted that Tuoketuo earthquake has the character of marked earthquake before moderately strong earthquakes.