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建立了一个从哈萨克斯坦东部到五个地震台阵的远震波路径的高频(0.5—8赫)P波减衰模型,四个UKAEA台阵分别设在苏格兰(EKA),加拿大(YKA),印度(GBA)和澳大利亚(WRA),对波路径的衰减影响以前曾有过研究(Bache,Marshall和Bache)。目前又增加一条到挪威地震台阵(NORSAR(挪威东部)的路径,并引入震源谱显校正值以扩大本文的研究。选用的事件为苏联塞米巴拉金斯克(Semipalatinsk)试验场地的地下爆破,取米勒和黑菲(Mueller和Murphy)模型的震源修正值。该模型用美国经验进行归一化。由许多台阵中的子台及大量爆破中获得的平均频谱推导出数条平滑曲线,基本上显示了在每条路径上的衰减影响。有三个主要特征,第一,五条波路径上衰减影响在0.5—3赫时几乎一致,表明对频率的强依赖关系。第二,3—8赫时,四个UKAEA台阵的波路径其衰减影响基本相同,挪威地震台的波路径则恰好相反。其校正震源谱几乎是平缓的。这说明该频带的路径平均Q值与频率成正比。第三,频率在7—8赫以上时,从挪威地震台阵波路径上获得的资料中发现了一些附加的衰减影响。因而,对于远震P波路径,其信噪比(signal/noise)在7赫或8赫时最大。0.5—8赫时的衰减影响可用吸收频带模型表示。UKAEA台阵波路径的参考模型其t_o(走时/长周期中的Q值)约为0.6秒。τm约?
A high-frequency (0.5-8 Hz) P-wave attenuation model for telepathic wave paths from eastern Kazakhstan to five seismic arrays was established. Four UKAEA arrays were located in EKA, YKA, India (GBA) and Australia (WRA), had previously studied the effects of attenuation on wave paths (Bache, Marshall and Bache). An additional route to the Norwegian Seismic Array (NORSAR) is now being added to expand the study in this paper by introducing source-specific spectral corrections, selected for underground explosions at the Semipalatinsk test site in the USSR , The source corrections for the Mueller and Murphy models are normalized by the United States’ experience and the number of smoothing curves derived from the sub-stations in many arrays and the average spectrum obtained in a large number of explosions , Basically shows the effect of attenuation on each path.There are three main features of the first and fifth wave paths are almost the same when the attenuation effect of 0.5-3 Hz, indicating a strong dependence on the frequency.Second, 3- At 8 Hz, the wave paths of the four UKAEA arrays have basically the same attenuation effect, but the Norwegian waveforms of the seismostatics are exactly the opposite, and the corrected source spectrum is almost flat, which shows that the average path Q value of the band is proportional to the frequency Thirdly, some additional attenuation effects were found in the data obtained from Norwegian Seismic Waves at frequencies above 7-8 Hz, and therefore for signal teleseismic P wave paths, ) At 7 hertz Or the maximum at 8 Hz. The decay effect at 0.5-8 Hz can be represented by the absorption band model. The reference model for the UKAEA array wave path has a t_o (Q in travel time / long period) of about 0.6 second.