The analysis of focal mechanism for 70 events in the SB coastal China indicates that the principal compression axes of the recent stress field is characterized by a fan-shaped distribution.
本文分析了东南沿海地区70个震源机制结果，得到本区现代构造应力场的主压应力轴具有扇形分布的特征。
The trace analysis for the anomaly showed that the catastrophic jumps may show the strengthening process of the stress field in North China, except that it related to the M 6 4 earthquake at Baotou.
异常追踪分析表明，此次突跳变化除与包头西6．4级地震有关外，可能还反应了华北地区应力场的增强过程。
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