The high-precision GPS data observed from the northeast margin of the Qinghai-Xizang (Tibet) block and the Sichuan-Yunnan GPS monitoring areas in 1991 (1993), 1
The underground fluid short-term anomalies of earthquake activity are studied. Two kinds of typical characteristies of precursors, the turn-around type and the
The results inferred from experiments with analogue models carried out previously have shown that two types of plastic-flow waves, 'fast-waves' and '