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什么是等震线图？What are isoseismal maps?

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。Earthquake isoseismal is usually determined based on the macroscopic earthquake affection and damages observed in the field.

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本文利用山东省及其邻区14个地震的37条等震线拟合山东地区地震烈度衰减公式。The formula of seismic intensity attenuation fitted by using 37 isoseismal lines of 14 earthquakes in Shandong and near area.

地震风险模型是非常有用的地图发展其烈度分布地区的地震数据仅部分可用。Seismic risk models are especially useful to develop isoseismal maps in areas where the earthquake data are only partially available.

等震线图是以在同一地震中由不同烈度的等震线构成的图样。Isoseismal maps are maps that show the distribution of intensities from the shaking of an earthquake with contours of equal intensity.

其共轭破裂特征在地震形变带展布、烈度等震线形态、前震和余震分布等方面表现明显。Their characteristics are shown clearly on the seismic deformation belts, isoseismal shapes, foreshocks and aftershocks distributions.

本文在考虑地震烈度评定和预测的不确定性的基础上，提出建立烈度衰减概率模型的方法。A method is presented for use in establishing probability model of seismic intensity attenuation in regions with abundant data of isoseismal maps.

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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。Such maps are often referred to as isoseismal or zoning maps and depict acceleration levels predicted for different location in an earthquake zone.

本文提出了利用等震线测定地震断层面的走向、倾向、倾角和破裂长度等震源参数的宏观方法。In this paper, a method is proposed such that the strike, dip, dipping direction and fracture length of a fault plane can be determined using of isoseismal lines.

其中1969年渤海地震正交破裂模式的结果与宏观等震线及小震分布图像更接近。Furthermore, the image of contour picture of maximum shear stress change on orthographically rupture mode of Bohai earthquake in 1966 is closer with the macroscopic isoseismal picture.