Comparison of Location Parameters from Two Systems of the 9th and 10th Five-year Plans of Shanxi Digital Seismic Network

496 earthquakes which can be located and part of ML≥3 earthquakes in 2002-2006,simultaneously recorded by both systems of the 9th and10th five-year plans of Shanxi Digital Seismic Network,are relocated.Statistic and contrast of five location parameters of the two systems,including origin time,longitude and latitude of epicenter,magnitude and focal depth,are made.The results show that deviation of origin time is small,which are basically satisfy the demand of quick report and catalogue.Focal depths are usually in the range of 8～10 km,not suitable for further study.For magnitude,the whole difference of average magnitude of two systems for the same seismic event is small,but they are usually 0.2～0.4 larger than the results determined by systems of adjacent provinces.