近地表大气电场异常与地震

自1977年以来,我们先后在白家疃、宝坻和北戴河等地震台设点对大气静电场进行了连续数年的观测和研究,通过与近场地震对比分析发现,大气电位梯度的负异常与近场地震有较好的对应关系。 也就是说,观测期间几乎所有的在测点附近100 km范围内ML4.0和250km范围內ML5.0的地震前均记录到了较大幅度的负电场异常,而在近场地震平静期则无该类异常出现,通过数年的观测和研究我们认为,对大气静电场与地震关系的进一步探讨,有可能找出可靠的地震前兆信息。

NEAR EARTH SURFACE ANOMALIES OF THE ATMOSPHERIC ELECTRIC FIELD AND EARTHQUAKES

A few years' continuous observation and investigation have been made of the static electric field in the atmosphere near ground surface at the Baijiatuan Seismic Station using different instruments since 1977. A relatively good correlation has been found between negative anomalies of the atmospheric electric potential gradient and local earthquakes through analysis and comparison. In other words, a relatively large negative anomaly of the electric field was recorded almost for each local quake of either ML4.0 with epicentral distance within 100 km or ML5.0 with epicentral distance within 250km, while no such anomaly appeared during earthquake-quiet periods. After the few years' observation and investigation we feel that it is possible to reveal a reliable precursor of earthquake through further study of the atmospheric static electric field.