摘要
该文深入分析了塔吉克斯坦伽马地区在遭受高能电磁脉冲辐射以及塞米巴拉金斯克核爆炸后的地震活动变化情况.研究结果表明,电磁脉冲以及核爆炸均使得该地区地震活动性显著提高,加速了地震能量的释放.此外,在该地区内发现了两个呈“花瓣”状的与活动断层相邻的地震能量异常增加区域,两个区域分别位于活动断层两侧,其中一个出现在电磁脉冲辐射后,一个出现在核爆炸之后.与此同时,上述两个地震能量异常区使得该区域存在较高的地质构造应力.另外,该文也分析了核爆炸对该区域地震活动情况的影响,结果表明,在距离核爆中心50~70 km范围内,均未观测到高应力区.此外,高能辐射作用使得约3500 km2的区域构造应力得到释放.由东北偏西南缘和东南缘的地震活动趋势明显增加可知,辐射区周围区域的构造应力呈现出持续增加的现象.
The change in seismicity of the Garm region in Tajikistan after an irradiation of its crust with high energy electromagnetic pulses(EP)and after the Semipalatinsk nuclear explosions(NE)is considered.It’s shown that the influence of EP,as well as NE,causes a statistically significant increase in the seismic activity and speed up the seismic energy release.Two areas of anomalous increase in seismic energy after irradiation and explosions adjoined to active faults were identified within the region.Both have a complex configuration in the form of two“petals”located in different sides of those faults.In both cases,one of the“petals”appears after EP,and the second after NE.It is shown that each of these“butterflies”constitutes as a whole anomalous area in which there are high tectonic stresses.The impact of NE has also been studied before beginning and after completion of these experiments.In both cases,those anomalous areas were not observed.Moreover after those experiments were completed,on distances of 50~70 km from the EP source no high stresses areas were observed at all.Consequently,the irradiation of the crust caused their relaxation on the area of about 3500 km2.However,judging by the appreciable rise in seismicity caused by NE on the southwestern and southeastern margins,stresses had been increasing on periphery of the irradiated area.
作者
Tarasov NT
Tarasova NV
Tarasov NT;Tarasova NV(Schmidt Institute of Physics of the Earth of the Russian Academy of Sciences,Moscow,Russia 101733)
出处
《湘潭大学学报（自然科学版）》
CAS
2020年第4期94-103,共10页
Journal of Xiangtan University(Natural Science Edition)
关键词
潜在地震
地震诱发
电磁脉冲
potential earthquake
earthquake initiated
electromagnetic pulse
