Abstract

This paper reviews high precision measurements of distances by geodimeters and elevations by first-order leveling between permanent geodetic monuments in local strain measurement patches on the coast of the Avacha Bay in order to detect strain precursors of a probable large (М > 7.0) near earthquake and to obtain quantitative characteristics of coseismic strain. We report the results of all 1984–1995 measurements in tabular form. These data are necessary for future researchers, since the extant monuments (benchmarks) can be surveyed in the future using any precision methods, to compare with the past results to derive objective inferences. No significant changes (those in excess of the double uncertainty) in elevations and distances between geodetic monuments have occurred. The large (М = 6.8) earthquake of March 2, 1992 whose epicenter was in the Avacha Bay did not give rise to any strain; no coseismic strain has been observed either. They may still have occurred, but the sensitivity of the method and the considerable distance between the strain measurement patches and the earthquake epicenter prevented detection.

中文翻译：

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断层带上小片地表变形的观测：堪察加，1984年至1995年

摘要

本文综述了通过测高仪对距离的精确测量以及通过对阿瓦查湾沿岸局部应变测量斑块中的永久大地古迹之间的一级测地标进行的高程测量，以检测可能在附近发生大地震（М > 7.0）的应变前兆并获得同震应变的定量特征。我们以表格形式报告所有1984-1995年测量的结果。这些数据对于将来的研究人员而言是必需的，因为将来可以使用任何精确方法对现存的古迹（基准）进行调查，以与过去的结果进行比较以得出客观的推断。大地古迹之间的高程和距离没有发生重大变化（超过双重不确定性的变化）。大（М= 6.8）1992年3月2日地震的震中在阿瓦查湾（Avacha Bay），没有产生应变。也没有观察到同震应变。它们可能仍然发生过，但是该方法的敏感性以及应变测量补丁与地震震中之间的较大距离阻碍了检测。