Fault movement (afterslip) following the Guatemala earthquake of February 4, 1976
Fault movement (afterslip) following the Guatemala earthquake of February 4, 1976
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1976 年 2 月 4 日危地马拉地震后的断层运动（后滑）
DOI：
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发表时间：
1978
期刊：
影响因子：
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通讯作者：
R. V. Sharp
中科院分区：
文献类型：
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作者：
R. Bucknam;G. Plafker;R. V. Sharp
与1976年2月4日危地马拉地震有关的地表断层的实地研究已经证明，在沿沿着230公里的地表破裂的七个位置发生了后滑。1976年4月测量的断层总位移平均为110厘米。其中一个位置的位移从1976年2月8日的60厘米增加到1977年10月6日的91厘米。在三个地点确定的后滑时间历程表明，后滑成比例的时间的对数，因为地震，后滑的速率是成反比的位移量在一个网站。总滑动量和后滑动量沿着约50 km的断层轨迹的规律性变化表明，后滑动不受局部近地表地质因素（如冲积层）的控制。
Field studies of surface faulting associated with the Guatemala earthquake of February 4, 1976, have documented the occurrence of afterslip at seven locations along the 230 km of surface rupture. The total displacement across the fault as measured in April 1976 averaged 110 cm. Displacement at one location increased from 60 cm on February 8, 1976, to 91 cm on October 6, 1977. Afterslip time histories determined at three sites show the afterslip to be proportional to the logarithm of time since the earthquake, and that the rate of afterslip is inversely related to the amount of displacement at a site. The regular variation in total slip and afterslip along about 50 km of the fault trace suggests that the afterslip is not controlled by local, near-surface geologic factors such as alluvial cover.