ANOMALIES OBSERVED BY ULTRA BROADBAND SEISMOMETER BEFORE WENCHUAN EARTHQUAKE
超宽频带地震计观测到的汶川地震震前异常

According to the observations of 16 ultra-broadband seismometers from 1st to 12th May 2008,it is demonstrated that there were obvious anomalies in 64-512 s ahead of the Wenchuan Ms8.0 earthquake in some frequency exclusively from the impact of the typhoon,this phenomena might be information related to the earthquake preparation.