1996年12月16日高丽营地震的磁效应
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摘要
以1996年12月16日发生在北京高丽营的Ms4．0地震为例，运用空间相关对该震中周围地磁台的Z分量空间相关系数RZ随时间变化及空间变化进行研究，发现震前3个月高丽营附近地区的RZ开始下降，表明该地区地磁场的线性关系已被破坏，而这一破坏逐渐增大直至能量释放（地震发生），并于震后迅速恢复正常，表明地磁场的线性关系已恢复。通过对Z分量加权差分后，发现震前异常沿断裂带从震中向远处传播的空间传播方式。
In this paper, we studied the Gaoliying earthquake with Ms 4. 0 occurred on 16 December 1996, Beijing. First , by using the spatial correlation method we analyze the verticalcomponent Z of proton magnetometer records near the epicenter, and have found that thecoefficient of correlation Rz goes down 3 months before the earthquake. It shows that thelinearity of the local geomagnetic field has been damaged, and the damage became strongeruntil the energy released (the earthquake occurred), and the anomaly quickly recovered after the event, indicating that linearity of geomagnetic field has been recovered before theearthquake. Meanwhile, by using the weighted difference method we revealed the immigration of the anomaly before the earthquake.
In this paper, we studied the Gaoliying earthquake with Ms 4. 0 occurred on 16 December 1996, Beijing. First , by using the spatial correlation method we analyze the verticalcomponent Z of proton magnetometer records near the epicenter, and have found that thecoefficient of correlation Rz goes down 3 months before the earthquake. It shows that thelinearity of the local geomagnetic field has been damaged, and the damage became strongeruntil the energy released (the earthquake occurred), and the anomaly quickly recovered after the event, indicating that linearity of geomagnetic field has been recovered before theearthquake. Meanwhile, by using the weighted difference method we revealed the immigration of the anomaly before the earthquake.
引文
1 赵明,林云芳,曾小苹,等.地磁方法对1996年11月9日长江口地震的预报.地震地磁观测与研究,1998,19(增刊):87～91.
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