大气电场异常作为地震短临预报标志研究进展

通过对华北地地区进行震前大气电场异常观测研究的较为全面分析和总结，验证和论述了震前大气电场异常的基本特征，用大量的震例证实了在每次较大的近场地震发生前都能观测到该类异常现象，以及当较长一段时间内观测不到该类异常时，近场近期也不会有较大地震发生的可能。

ADVANCEMENT OF THE STUDY ON TAKING THE ANOMALIESOF STATIC ATMOSPHERIC FIELD AS INDEX OF SHORT- TERM AND IMMINENT EARTHQUAKE PREDICTION

The basic characteristics of anomaly of quasi-static atmospheric electric field before local earthquakes are expounded and proved based on systematic analysis.Observational research on anomalies of static atmospheric field in northern China was summed up for2 0 years.It is confirmed that these anomalies are always observed before every bigger local earthquake.There will be no large local shock in the nearfuture ifthere is no big negative amplitude anomaly recorded.Some quantitative and qualitative judgement indexes are set forward and proved wtih anomaly and occurrence time,epicenter location and magnitude of the shock.The further summation of earthquake examples,the result of longer and continuous observation and practice are applied to describe the possible internal relation between anomaly information and earthquake occurrence.Based on the theory of physics, the existing mechanism and transmission regularity of electric field of earthquakes are studies.Very obvious negative anomalies of atmospheric electric field that observed have been well explained.At last,the superiority and the consequence of static atmospheric field in observational research of the earthquake electric field are pointed outby comparing and analysing the observational method of static and general electric field.