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一、地震信号特点及其量度地震是一种瞬变地球物理现象,地震信号是瞬时信号。因此如何量度地震强度实际上可归结为如何量度瞬变信号的强度。一个瞬时脉冲信号的强度既取决于脉冲幅度,也取决于脉冲宽度(脉冲持续时间)。强度不同的地震其震源体波脉冲不只是脉冲幅度不同,脉冲持续时间也可能不同。前者与震源释放的能量有关,后者与能量幅射的持续时间有关。持续时间有限的瞬时脉冲函数,不管其具体形式如何,理论上它的频谱是连续无限的.如果震源能量释放是在一瞬间内完成,震源时间函数就可用δ(t)函数来表示。这时,震源能
First, the characteristics and measurement of seismic signals Earthquake is a transient geophysical phenomenon, the seismic signal is an instantaneous signal. So how to measure seismic intensity can actually be attributed to how to measure the intensity of transient signals. The strength of an instantaneous pulse signal depends on the pulse amplitude and on the pulse width (pulse duration). Earthquake pulses of different intensities not only have different pulse amplitudes but also different pulse durations. The former is related to the energy released by the source, which is related to the duration of the energy radiation. The finite duration impulse function, regardless of its specific form, is theoretically infinite in frequency and can be expressed as a function of δ (t) if the source energy release is completed in a single moment. At this time, the source can