关于活断层和断层所谓活断层,是指不久以前多次活动而且在最近的将来仍有可能活动的断层。这一命题的后半部分就是活断层的定义(旨在把活断层从一般断层中区分开来)。尽管应把前半部分即在不久前曾活动过说成是确定活断层的标准,但无论是在日本还是在美国,都有很多以此为定义的书。活断层的先驱研究者华莱士(R.E.Wallace)最近也主张不应把定义和准则混同起来。尽管在定义中使用了“不久以前”、“最近的将来”、“有可能”等不妥当的词汇,但深究其含义就会漫无止境,所以在此不追根问底。一言以蔽之,所谓活断层原是实用性用 About active faults and faults The so-called active fault is a fault that has been active many times before and may still be active in the near future. The second half of this proposition is the definition of an active fault (designed to distinguish the active fault from the general fault). Although the first half, that is, the activity not long ago, should be used as a criterion for determining the active fault, there are many such books defined in Japan and the United States. R.E. Wallace, a pioneer of active faults, recently argued that definitions and norms should not be confused. Although improper terms such as “not long ago”, “the nearest future” and “possible” are used in the definition, it is endless to find out what the meaning is and we will not go back to the bottom here. In short, the so-called active fault was originally used