Abstract: Using the method of multi-parametric moving maximum probability, we try to quantitatively identify and extract precursory anomalies from multi-parametric seismic data for the west section of southern Tianshan, Xinjiang. Through temporal-spatial scanning of spatial evolution process of multi-parametric moving maximum probability we obtained the spatial chracteristics of multi-parametric precursory anomalies before moderate-to-strong earthquakes in this region. It is found that for 10 (or group) moderate-to-strong earthquakes since 1980 in the region, there are great changes of multi-parametric moving maximum probabilty 1 to 2 years before the earthquakes in the epicentral area, and high anomaly areas gradually dissipate, decrease or disappear about 1 year after the earthquakes. Generally, there are no high anomaly area of moving maximum probabilty in quiet periods.

Key words: Earthquake Corresponding Probability Spectrum, Multi-parametric moving maximum probability, Integrated Anomaly, Anomaly spatial Characteristics