Scientists puzzled by foreshock-less SW China earthquake BEIJING, May 20 (Xinhua) — Some scientists were puzzled by the unusual quiet period of quakes before the 8.0-magnitude earthquake struck southwest China. But others believe there had been precursors, which stood as warnings for a major quake. “There were no foreshocks and the activity level of minor … Continue reading Scientists puzzled by absence of foreshocks and other typical precursors prior to China Earthquake