论文部分内容阅读
短基线测量是定点地壳水平形变测量的一种手段。《地震台站观测规范》(试行)载称:台站基线的布设,分为“断裂位移型”和不跨断裂的“应变型”两种,前者作用在于监视断裂的水平位移,后者则以观测地面的水平应变为目的。按观测方法分,短基线测量又可分为不定期测量的“流动基线观测”和每天进行测量的台站短基线。从1968年在邢台地区建立形变台以来,各台陆续布设过一些“应变型”基线场地,试图取得地震前应变变化的前兆,但十多年来收效甚微,许多人对这种手段提出了质疑。 从理论上来说,观测了三个不同方向的长度变化(线应变)就可以计算出这一地区内主应
Short baseline measurements are a measure of horizontal crustal deformation measurements at the fixed point. The Seismic Station Observations Specification (Trial) states that the base station layout is divided into two types: “fracture displacement type” and “strain type” that do not cross fracture. The former functions to monitor the horizontal displacement of faults and the latter To observe the ground level of strain for the purpose. According to the observation method, short baseline measurement can be divided into non-periodic measurement of the “flow baseline observation” and daily measurement of the station short baseline. Since the establishment of the deformable station in Xingtai in 1968, Taiwan has successively set aside some “strained” baseline sites to try to obtain the precursors of the change in response to the earthquake. However, it has been ineffective for more than a decade and many people have put forward such measures question. Theoretically speaking, observing the change of length in three different directions (line strain) can calculate the main response