Abstract: Systematic research of ground fluid precursory anomalies in Yunnan before Burma M_S7.2 earthquake on March 2011 was done. The study results show that 17 items of anomalies in 14 observation stations appeared before the earthquake within 540 km from the epicenter. Temporal and spatial characteristics of anomalies show that the anomaly evolution displays obvious stage. Anomalies gradually increase five months before the earthquake and seem to concentrate to the epicenter.

Key words: Yunnan region, Ground fluid, Anomaly characteristics, Tendency anomaly, Burma M_S7.2 earthquake