摘要
本文从震源应力场、岩石膨胀性和水的扩散作用来研究和解释1974年5月11日云南省永善7.1级地震的震源及其前兆的孕育发展过程,研究以水平错动为主的地震在孕育发展过程中所伴生的地震活动、前兆异常现象在空间分布上的特点,以及随时间变化的过程,探讨了多种前兆现象之间的内在联系和余震发生的可能原因。从上述观点出发对地震预报提出了一些新的途径和方法。
The earthquake source of magnitude 7.1 occurred in Yong Shan on May 11,1974 and the process of development of its precursory phenomena have been examin-ed and interpreted from the point of view of the actions of focal stress field,rock dilatability and water diffusion.The earthquake is assumed to be mainly of the horizontal slip type,this study concerns with the characters of the space distributions of seismic activity and the precursory phenomena accompanying the development of the earthquake source as well as their variation with time.The interrelationship be-tween a variety of precursory phenomena and the possible cause of aftershock occurrence have been investigated.In conclusion,basing on the above-mentioned points,some new approaches for earthquake prediction have been suggested.
作者
蜀水
SHU SHUI(The Seismological Brigade of Chengdu,National Seismological Bureau)
出处
《地球物理学报》
1976年第2期74-94,共21页
Chinese Journal of Geophysics
