环境条件分类第2-6部分：自然界中出现的环境条件地震振动和冲击

[中文适用范围]： IEC 60721-2-6:2022 涉及自然界中与地震振动和冲击相关的环境条件。其目的是定义一些用于表征地震的基本属性和数量，作为产品在储存和使用过程中可能遭受的严重程度的背景材料。给出的加速度仅适用于地面条件。与结构相关的条件被提及但仅限于一般情况描述。第二版取消并取代了 1990 年出版的第一版。该版本构成了技术修订。与前一版本相比，本版本包括以下重大技术变化： 本次修订的主要目的是将设备安装区域的地震活动级别划分为有限数量的等级；由于严格定义这种相关性的科学不确定性，强度尺度、震级尺度和峰值地面加速度之间的相关性被删除；强度和震级都给出了更新的尺度；实际中无法使用的地震区地图被附件所取代，其中提供了有关如何检索世界各地一致的峰值地面加速度分布的信息；关于确定可安装设备的区域的峰值地面地震加速度，用户应了解可以适用国家标准和法律。 [外文原描述]： IEC 60721-2-6:2022 deals with environmental conditions appearing in nature related to earthquake vibrations and shocks. Its object is to define some fundamental properties and quantities for characterization of earthquakes as background material for the severities to which products are liable to be exposed during storage and use. The accelerations given are for ground surface conditions only. Conditions related to structures are referred to but restricted to general case descriptions. This second edition cancels and replaces the first edition published in 1990. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition: the main aim of this revision is to classify in a limited number of classes the seismic activity level of the zone where the equipment could be installed; the correlation between intensity scales, magnitude scales and peak ground acceleration is deleted due to the scientific uncertainty to define such a correlation in a rigorous way; updated scales are given both for intensity and for magnitude; the earthquake zone map, which was not usable in practice, is replaced by an annex giving information about how to retrieve consistent peak ground acceleration distribution all over the world; with regard to identification of the peak ground seismic acceleration of the zone, where the equipment could be installed, the user is made aware that national standards and laws can apply. The contents of the corrigendum of October 2023 have been included in this copy.