陕西数字地震台网子台测定震级的研究
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摘要
使用陕西数字地震台网1998～2003年间的地震记录,以台网平均震级为标准震级,分析了各子台的测定震级。结果表明,各子台测定震级的偏差存在地域分布特征,震级随方位角显示趋势性变化。台址位于平原和山区交界处的台站,对于山区发生的地震测定震级偏大,对于平原地区发生的地震测定震级偏小。最后对震级偏差成因进行了探讨。
On the Basis of 1998-2003 digital seismic data from the Shaanxi Digital Seismic Network, we analyzed the magnitudes determined by the substations of the network. The result shows that if taking average network magnitude as a standard magnitude, the magnitude deviation would have a regional distribution. For the substation located at the plain-mountain boundaries, the observed magnitude will be bigger than standard magnitude when the shock occurs in the mountain, but smaller when it occurs in the plain. We discussed the reason for magnitude deviation in the end of the paper.
On the Basis of 1998-2003 digital seismic data from the Shaanxi Digital Seismic Network, we analyzed the magnitudes determined by the substations of the network. The result shows that if taking average network magnitude as a standard magnitude, the magnitude deviation would have a regional distribution. For the substation located at the plain-mountain boundaries, the observed magnitude will be bigger than standard magnitude when the shock occurs in the mountain, but smaller when it occurs in the plain. We discussed the reason for magnitude deviation in the end of the paper.
引文
陕西省地震综合队.陕西省关中盆地地震构造与地震活动关系研究报告.1980.
陕西省地质局综合研究队.1:50万陕西省构造体系图说明书.1978.
[1]孟智民,王卫东,李大伟.陕西数字地震台网的监测能力[J].西北地震学报,2002,24(2):178-182.
[2]中国地震局.地震及前兆数字观测技术规范[M].北京:地震出版社,2001.
[3]陈培善,秦嘉政.量规函数、台站方位、台基及不同测量方法对近震震级ML的影响[J].地震学报,1983,5(1):87-98.
[4]薛峰,赵永.DK1地震仪的面波震级起算函数研究[J].地震学报,1997,19(3):235-240.
[5]孟晓春,陈阵阳,候玉昆.地震观测与分析技术[M].北京:地震出版社,1998.
陕西省地质局综合研究队.1:50万陕西省构造体系图说明书.1978.
[1]孟智民,王卫东,李大伟.陕西数字地震台网的监测能力[J].西北地震学报,2002,24(2):178-182.
[2]中国地震局.地震及前兆数字观测技术规范[M].北京:地震出版社,2001.
[3]陈培善,秦嘉政.量规函数、台站方位、台基及不同测量方法对近震震级ML的影响[J].地震学报,1983,5(1):87-98.
[4]薛峰,赵永.DK1地震仪的面波震级起算函数研究[J].地震学报,1997,19(3):235-240.
[5]孟晓春,陈阵阳,候玉昆.地震观测与分析技术[M].北京:地震出版社,1998.
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