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How Observer Conditions Impact Earthquake Perception

机译：观察员条件如何影响地震知觉

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Intensity scales define the criteria used to determine different levels of shaking in relation to environmental effects. Objective evaluations of low-intensity degrees based on transient effects may be difficult. In particular, estimations for the number of people feeling an earthquake are critical and are qualitatively described by words such as "few," "many," and "most" for determining various intensity levels. In general, such qualitative amounts are converted into specific percentages for each macroseismic scale. Additionally, estimations of macroseismic intensity are influenced by variables that are mentioned in macroseismic scale degree descriptions. For example, the Mercalli- Cancani-Sieberg (MCS; Sieberg, 1930) and the modified Mercalli intensity scales (Wood and Neumann, 1931) describe intensity II as a vibration felt only by a few people, extremely susceptible, almost always on the upper floors of buildings. Another example is the European Macroseismic Scale (EMS) (Grünthal, 1998), which describes the intensity V as "felt indoors by most, outdoors by few. Many sleeping people awake."
机译：强度标度定义了用于确定与环境影响有关的不同级别震动的标准。基于瞬态效应对低强度度进行客观评估可能很困难。特别地，对于地震感觉的人数的估计是关键的，并且用诸如“很少”，“很多”和“最多”的词语定性地描述，以确定各种强度水平。通常，将这种定性量转换为每种宏观地震标度的特定百分比。另外，宏观地震烈度的估计受宏观地震规模描述中提到的变量影响。例如，Mercalli-Cancani-Sieberg（MCS; Sieberg，1930）和修正的Mercalli强度标度（Wood和Neumann，1931）将强度II描述为只有少数几个人感觉到的振动，极易受影响，几乎总是在上层建筑物的楼层。另一个例子是欧洲宏观震级（EMS）（Grünthal，1998），它描述的强度V“在室内感觉最多，在室外感觉很少，许多熟睡的人醒着”。

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