地表流体变化对跨断层形变观测的影响
Influence of Surface Fluid Changes on Cross-Fault Deformation Observations

对易县台2007—2012年跨断层形变观测资料分析表明，降雨量及地下水位变化等引起的地表流体变化会引起点位的上升或下沉，这种影响表现出一定的季节性，并且与降雨量的多少（或地下水位变化）有关。当降雨量呈季节性变化时，水准观测值变化也会表现出相应的季节性变化；当地表流体呈现低值或不规律时，断层变形行为也会失去周期性，因此认为地表流体变化会引起断层变形。
The cross-fault deformation observation data from the Yixian seismic station from 2007 to 2012 show that the surface fluid changes caused by rainfall and underground water level change will cause the subsidence and rise of point positions. This effect is seasonal and related to the amount of rainfall (or change in the underground water level). When the rainfall changes seasonally, the leveling observation values show corresponding seasonal changes. When the surface fluid shows low or irregular values, the fault deformation behavior will not exhibit cyclical change. As such, changes in the surface fluid will cause fault deformation behavior. The qualitative and quantitative analyses of these shallow layer anomalies are important for the determination of impending anomalies.