The seismicsource USES the rotation of centrifugal quality to produce seismic energy. The produced sweep signals are recorded by clockwise and counter clockwise rotation at each source point.
这种地震震源采用离心质量旋转地震能量，在每个震源点记录下顺时针转动和逆时针转动所产生的扫描信号。
2
Why is prediction so difficult? This question cannot be answered conclusively, as we do not yet have a definitive theory of the seismicsource.
为什么地震预测那么困难？对这个问题不能做出最后的答复，因为我们至今没有对地震成因的一个确定的理论。
3
The author tries to investigate the force source causing the drastic crustal deformation and frequent seismic activities in southwest China.