河北历史地震模拟波形图纸数字化方法及初步研究

Digital Method and Preliminary Study of HebeiHistorical Simulated Seismograms

利用HSD软件对河北台网部分模拟图纸进行波形数字化,提取到9个地震27条SAC格式波形文件,利用软件对数字化波形进行震相到时、振幅、震级偏差等多方面校验。结果表明,所有可拾取的震相到时总体平均绝对偏差为0.31 s;振幅总体平均绝对偏差为0.04μm,与原振幅值基本相当;震级平均绝对偏差为0.08,整体偏差较小,精度较高。最终校验结果表明,数字化后的波形可较好地应用于数字化软件,为后续波形数字化以及历史数据的数字化应用提供较好的研究基础。

We use HSD software to digitize waveforms from some simulated seismograms of the Hebei station network,and extract 9 earthquakes and 27 SAC format waveforms,and verify the digitized waveform in various aspects such as phase arrival time,amplitude,magnitude deviation.The results show that the overall average absolute deviation of all the pick-up phases is 0.31 s,the overall average absolute deviation of amplitude is 0.04μm,which is basically equivalent to the original amplitude,the average absolute deviation of magnitude is 0.08,with a small overall deviation and high accuracy.The final calibration results show that the digitized waveforms can be better applied to the digitizing software,which provides a better research basis for the subsequent waveforms digitization and the digitizing application of historical data.