长春地震台大震速报震级偏差研究
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摘要
本次研究选用了本台 2 0 0 0年全年的速报地震资料 ,重新测算了DK 1地震仪各分向记录的面波震级 ,并以《中国地震速报台网观测报告》给出的震级为标准震级 ,进行了震级偏差统计分析。研究结果表明 ,以长春台DK 1地震仪水平向高倍档记录测算的面波震级平均偏低 0 1 1 ,标准误差为± 0 2 1 ;以水平向低倍档记录测算的面波震级平均偏高 0 1 0 ,标准误差为± 0 2 0 ;以垂直向记录测算的面波震级平均偏低 0 2 4,标准误差为± 0 2 6。通过对统计结果的全面分析 ,分别给出了长春台DK 1地震仪水平向高低倍档和垂直向记录测算面波震级的台站校正值。
By analyzing all of the seismic quick-reporting data of CSS in 2000,the surface wave magnitudes about all of the components of DK-1 are recalculated. In the meantime, according to the standard of "Standard Magnitude" presented by China Seismological Quick-reporting Network Observation Report, the statistical analysis of magnitude-aberration is made. It is shown that the surface wave magnitude from the recording of high power of magnification about the horizontal component of DK-1 at CSS is 0.11, below the normal value averagely; and the standard error is ±0.21. The surface wave magnitude from the recording of low power of magnification about the horizontal component is 0.024 ,also below the normal value averagely; and the standard error is ±0.26. The surface wave magnitude about the vertical component is 0.24, below the normal value averagely; and the standard error is ±0.26. By analyzing the statistical result, the rectified values of all the components related above are given.
By analyzing all of the seismic quick-reporting data of CSS in 2000,the surface wave magnitudes about all of the components of DK-1 are recalculated. In the meantime, according to the standard of "Standard Magnitude" presented by China Seismological Quick-reporting Network Observation Report, the statistical analysis of magnitude-aberration is made. It is shown that the surface wave magnitude from the recording of high power of magnification about the horizontal component of DK-1 at CSS is 0.11, below the normal value averagely; and the standard error is ±0.21. The surface wave magnitude from the recording of low power of magnification about the horizontal component is 0.024 ,also below the normal value averagely; and the standard error is ±0.26. The surface wave magnitude about the vertical component is 0.24, below the normal value averagely; and the standard error is ±0.26. By analyzing the statistical result, the rectified values of all the components related above are given.
引文
[1]张兴科长春台用多各持续时间测定的震级公式〔J〕地震地磁观测与研究,1990,11(2):18～22
[2]孟玉梅中国地震观测台网速报震级分析〔J〕地震地磁观测与研究,1987,8(1):18～24
[2]孟玉梅中国地震观测台网速报震级分析〔J〕地震地磁观测与研究,1987,8(1):18～24
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