地震震级谱的研究及应用

该文从谱震级的概念引伸出震级谱,推导出计算震级谱的公式,并对实际资料进行了处理。震级谱比谱震级的优越性表现在它更全面地描述了一个地震波,计算迅速,且由震级谱对频率段取平均可以得到谱震级,由谱震级则不能得到震级谱。震级谱不仅与传统的震级标定有一定的衔接性,而且,它全面描述了地震波的能流密度或能量密度。由震级谱计算过程中所提供的位移谱、拐角频率等参数,可以在地震工程学中得到应用。

STUDY AND APPLICATION OF EARTHQUAKE MAGNITUDE SPECTRA

This paper gives a new conception about magnitude spectra based on the spectral magnitudes of German Prof. S. J. Duda. The writers present then caiculating formula of magnitude spectra and recount its computatinal method, and also show its applications in field data. Compared with spectral magnitudes, the magnitude spectra can describe a seismic wave more completly, and computate quiekly. Fuvlhermore, spectral magnitudes from averaging all frequency fragment's magnitude spectra can be derived. On the contrast, magnitude spectra from spectral magnitudes can not be derived. Compared with traditional magnitude definited methods the superiority of magnitude spectra shows, that it is not only compatible with traditional magnitude definited methods, but also can completly describe energy density of seismic wave. During calculating magnitude spectra, displaced spectra and corner frequency are obtained, these parameters can be applicated in seismic engineering.