Recent advances of research on Diexi earthquake

On August 25, 1933, an M7.5 earthquake occurred in Diexi of Maoxian County, Sichuan Province, China. The strong earthquake caused a lot of landslides and collapses. The Diexi town was destroyed completely, and casualties were heavy. After 45 days, the barrier lake made by the earthquake burst to cause serious secondary flood. Recent advances of research on the earthquake were shown, including discovery of photographs about the earthquake and its secondary flood, discovery of the related investigation literatures carried out by geologist Chang Longqing and teachers and students of Sichuan University, discovery of other historical document about this earthquake, recent research production in seismogeology and geophysics, general works about the Diexi earthquake and works of seismosociology. Suggestions about further research on the Diexi earthquake were proposed.