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大震前的水氡突跳,是指震前某日测氡值明显高出相邻日期的观测值的异常现象。渤海地震、海城地震和松潘地震等大震前一些水氡观测点出现明显突跳,大都是每日一至两次取样进行观测的。这里简单介绍采用自记测氡仪在一些测点观测到的日变现象。图1是北京一喷气井(无线电研究所院内)的气氡观测值曲线,一天内有较大变化,但逐时值缓变无突跳。图2是福州水化站自流井(热水)水氡观测值曲线,傍晚至夜间有高
Sudden jump of water radon before large earthquake refers to the abnormal phenomenon that the measured radon value on one day before the earthquake is obviously higher than that of the adjacent date. Some water radon observation points before the great earthquakes such as the Bohai Sea Earthquake, the Haicheng Earthquake and the Songpan Earthquake experienced sudden jumps, most of which were observed once or twice daily. Here is a brief introduction to the use of self-recorded radon detector observed at some points of the daily change phenomenon. Figure 1 shows a curve of gas radon observations at a Beijing jet (Institute of Radio Institute) gas with large variations in one day, but no hiccups on a time-lapse basis. Figure 2 is Fuzhou hydration station artesian wells (hot water) water radon observation curve, evening to night high