Some scientists say a slow earthquake could be helping to release pressure of the earth, and able to prevent powerful quakes.
一些科学家称小地震可以帮助地球释放压力，并阻止强烈地震的发生。
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Fhe active earthpressure for hydraulic structures caused by earthquake is rather complicated. There are some defects in its calculation formula in current seismic design specification.
By analyses, a simplified calculation method of active earthpressure on back of abutment UN der earthquake condition has been put forward. Calculating results prove the reasonable of this method.