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仪器地震小区划以在不同土质条件下记录到的地震图的比较分析为基础。通常,选择硬土作为标准土。无论在时间上还是在频率范围上都可对地震图进行比较。谱的概念之所以最受欢迎,是因为依据一定频率的谱密度水平进行土振动的比较可以得出单解的结果。但是,谱分析在实际运用和资料解释时也有一系列的困难,所以在进行大量的资料处理时,往往运用较为简单的地震图特性曲线:最大振幅 A 和相应周期 T。
The instrument seismic zoning is based on the comparative analysis of seismograms recorded under different soil conditions. Normally, hard soil is chosen as the standard soil. Seismic plots can be compared both in time and over the frequency range. The reason why the concept of spectrum is the most popular is that the comparison between the soil vibrations based on the spectral density at a certain frequency can lead to the solution of the solution. However, spectrum analysis has a series of difficulties in practical application and data interpretation. Therefore, when processing a large amount of data, the simpler seismogram characteristic curve is often used: the maximum amplitude A and the corresponding period T.