Science. 1981 Jan 2;211(4477):56-8. doi: 10.1126/science.211.4477.56.
Frequently repeated strain measurements near Palmdale, California, during the period from 1971 through 1980 indicate that, in addition to a uniform accumulation of right-lateral shear strain (engineering shear, 0.35 microradian per year) across the San Andreas fault, a 1-microstrain contraction perpendicular to the fault that accumulated gradually during the interval 1974 through 1978 was aseismically released between February and November 1979. Subsequently (November 1979 to March 1980), about half of the contraction was recovered. This sequence of strain changes can be explained in terms of south-southwestward migration of a slip event consisting of the south-southwestward movement of the upper crust on a horizontal detachment surface at a depth of 10 to 30 kilometers. The large strain change in 1979 corresponds to the passage of the slip event beneath the San Andreas fault.
在加利福尼亚州帕姆代尔附近，1971 年至 1980 年期间频繁进行的应变测量表明，除了圣安德烈亚斯断层上的右旋剪切应变（工程剪切，每年 0.35 微弧度）均匀累积之外，1974 年至 1978 年期间逐渐累积的垂直于断层的 1 微应变收缩在 1979 年 2 月至 11 月期间无震释放。随后（1979 年 11 月至 1980 年 3 月），大约一半的收缩得到了恢复。这种应变变化序列可以用一个由水平滑脱面（深度为 10 至 30 公里）上的地壳向南西南方向运动组成的滑动事件的向南西南方向迁移来解释。1979 年的大应变变化对应于滑动事件通过圣安德烈亚斯断层下方。
