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论述了由数字化地震记录测定震级谱、频谱的特征方法：将天文学上对天体星等色指数的办法移植到地震学中，用模拟地震记录测算４种震级标度所定义的震级，进而计算“震级色指数”，并用以判别地震系列的类型：ａ）红地震；ｂ）蓝地震；ｃ）前震型；ｄ）混合震群型；ｅ）单主余震型；ｆ）孤立型地震的频谱特征及其频谱成分标志。结合中国地区基准台和ＣＤＳＮ台网的记录，对汉堡大学杜达教授（Ｓ·Ｊ·Ｄｕｄａ）按地震系列中谱震级的高频成分和低频成分的比例划分为蓝地震和红地震的方法有所发展，提出了较为明确的判别指标。指出这将有助于识别前震与前震系列。
The method of measuring magnitude and frequency spectrum by digital seismogram is discussed. The method of transplanting the equal-color index of celestial star into seismology is transplanted astronomically, and the magnitudes defined by four kinds of magnitude scales are calculated by using simulated seismograms. Magnitude index of magnitude "and used to determine the type of seismic series: a) red earthquakes; b) blue earthquakes; c) foreshock patterns; d) mixed earthquake swarm patterns; e) single main aftershocks patterns; f) spectral characteristics of isolated earthquakes And its spectral composition of the logo. Based on the records of datum stations and CDSN stations in China, the method of dividing blue-earthquakes and red-earthquakes by SD Duffy of the University of Hamburg according to the ratio of high-frequency and low-frequency components of spectral magnitude in the earthquake series Developed, made a more clear indicators of discrimination. Pointed out that this will help identify the pre-earthquake and foreshock series.