摘要
本文运用安阳及邻区研究范围内,地震台网所能接收到的 S-P≤25.0 秒的所有台站记录到的ML≥2.0级地震的P波到时和 S 波到时进行了波速比计算,并对研究区域内 5 次中强地震前波速比变化作了空间演化图。从 2001年5月到现在波速比空间演化特征来看,明显出现了低值异常集中区和高低值异常交替区。从时间序列演化特征来看,波速比始终处于低于平均值1.70 以下。根据我们以往对研究区域内波速比的研究和对比分析,在未来24个月,研究区域存在发生 ML≥5.5 级±0.5 级地震的可能。
This paper calculates the velocity ratios of the P-waves and S-waves of earthquakes of MI≥2.0 recorded in all stations of S-P≤25.0S received in all seismological networks within Anyang and its adjacent regions, and constructs special evolution pattern of the variations in the velocity ratios before the 5 moderately strong earthquakes in the studied area. It has shown obvious low-values section and high-low values sections according to the analysis of special evolution characteristics since May, 2001. By time queue, the velocity ratios always vary below 1.70, a value lower than average. Based on our study and contrast analysis of velocity ratio in the studied area, we predict that there is possibility of earthquakes of ML≥5.5±0.5 in the coming 24 months.
出处
《防灾技术高等专科学校学报》
2005年第1期40-45,共6页
Journal of College of Disaster Prevention Techniques
关键词
安阳及邻区
波速比
研究分析
Anyang and its adjacent regions
velocity ratio
study and analysis
