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A lot of slow fluctuations of water level have been observed in the original recording maps of subsurface fluid in Well Shuozhou, Shanxi Province. Some typical recording maps of the “precursors” are introduced in the paper and the features of the “precursors” recorded by the well are analyzed. The results show that 38% strong earthquakes possess this kind of record, which has a fluctuation period...
5 Conclusions 1) Ultrasonic laboratory measurements of ultrasonic elastic vP carried out on serpentinized pyroxenite at 1.0 GPa from room temperature to 960 °C in a multi-anvil pressure apparatus, and four quenched products were gotten. The velocity was from 6.4 km/s to 5.0 km/s at temperatures more than 500 °C, with a remarkable decrease of 22%. At the temperature from 660 °C to 800 °C, the vP...
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