Abstract: In recent years, electromagnetic disturbance observation method has attracted more and more attention of earthquake prediction experts. However, there are many kinds of observational instruments in our country, and they have different observation objects, bands, configuration, specification and environment, so it has great difficulty in sharing and analyzing the observation data as well as the studies on method and theory. Therefore it's realy necessary, important and urgent to normalize and standardize the electromagnetic disturbance observation. The experiments of electromagnetic disturbance observation at Jinghai earthquake station, Tianjin were carried out and the data were analyzed detailedly in this paper, which can provide the basic data and references of the normalization and standardization of electromagnetic disturbance observation. Thereby it can assure the scientific observation, enhance the role of this method in research of earthquake science and promote the development of earthquake prediction.

Key words: Electromagnetic disturbance, Electromagnetic event, Frequency spectrum, Electromagnetic disturbance receiver