Earthquake isoseismal is usually determined based on the macroscopic earthquake affection and damages observed in the field.
地震烈度包络线通常用地面调查宏观地震影响和破坏现象来划分。
The first isoseismal lines were drawn by Liu Jichen of the earthquake of Anhui, in 1917 (Liu Jichen, 1917).
刘季辰对1917年安徽地震第一次绘制出了等震线图(刘季辰，1917)。
Such maps are often referred to as isoseismal or zoning maps and depict acceleration levels predicted for different location in an earthquake zone.
这种地图通常被称为其烈度分布或分区图以及包含加速度各级预言为不同的地点在一个地震灾区。
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