倾斜和应变记录到同震阶跃，但持续时间相对较短。
The short coseismal step was recorded in tilt and strain data.
结果表明，区域垂直形变场分数维在地震前下降，同震时段降至最低。
The results show that the fractal reduces before an earthquake and is minimum during earthquake, according to which the criterion of dividing seismic risk is put forward.
钻孔应变观测记录的同震应变阶对于研究同震应力触发断层活动具有特殊的价值。
Strain steps recorded by borehole strainmeters are of special values in studies of coseismic stress triggered fault activities.
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