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地震仪对地震波的影响是由仪器的频率特性决定的。由于不同频率特性的仪器,对地震波的响应是不同的。测定震级所使用的频率范围依赖于所使用的仪器。短周期DD-1地震仪整机频在0.1—1.0秒这段频带范围内,动态放大曲线几乎是平坦的,超过1秒,曲线急剧下降,因此DD-1只适应一秒以内地震波的震级计算。中长周期SK地震仪的通频带基本上落在0.1—10秒范围,在其通频带范围内,动态放大倍数基本稳定。长周期763地震仪,它的频率
The influence of the seismometer on the seismic wave is determined by the frequency characteristics of the instrument. Due to the different frequency characteristics of the instrument, the response to the seismic wave is different. The frequency range used to determine the magnitudes depends on the instrumentation used. Short-cycle DD-1 seismograph machine frequency in the 0.1-1.0 seconds this band, the dynamic amplification curve is almost flat, more than 1 second, the sharp decline in the curve, DD-1 only to adapt to the earthquake within one second the magnitude of the earthquake . The long-period SK seismograph passband basically falls in the 0.1-10 second range, in the pass band range, the dynamic amplification is basically stable. Long period 763 seismograph, its frequency