论文部分内容阅读
1976年11月7日,我国川滇两省交界处昀盐源、宁蒗一带发生6.7级走滑断层型地震。震前约一年,作者根据附近约2万平方公里范围内的波速比普查结果,对未来主震的震级和地点作了比较符合实际的预报。发震时间的预报是后来根据其它前兆观测结果的综合分析作出的。 本文可以作为走滑断层型地震前观测到波速变化的一个新的实例。根据剪切破裂和粘滑运动之间的差别以及膨胀造成的各向异性,对有关结果作了初步讨论。
On November 7, 1976, a 6.7-magnitude strike-slip fault earthquake occurred in Yunyan and Ninglang areas at the junction of Sichuan, Yunnan and Yunnan provinces. About one year before the earthquake, the author made a comparatively realistic forecast of the magnitude and location of the future mainshock according to the results of the census of wave velocities in the vicinity of about 20,000 square kilometers. The prediction of the onset time was later based on a comprehensive analysis of the other precursor observations. This paper can be used as a new example of the observed changes in wave velocity before a strike-slip fault. Based on the difference between shear fracture and stick-slip motion and the anisotropy due to swelling, the results are discussed initially.