Abstract: Using the previous re searches as reference, we analyzed the distribution of the seis-mic tectonic zones around Bohai Sea, regional tectonic background and its activity. Basedon the analysis, we studied the variation about the total members of the precursory anomalies, which have occurred in the north of North China before Zhangbei 6. 2 earthquake till now, and the distribution of the anomalies along the seismic tectonic zones. Finally, we conducted the re search on the tendency of seismicrisk along the major active tectonic zones.

Key words: Seismic tectonic zone, Distribution of precursory anomalies, Evaluation for the tendency of seismicrisk, Bohai Sea area