长周期地震观测中的环境干扰

THE ENVIRONMENTAL INTERFERENCE TO THE OBSERVATION WITH LONGPERIOD SEISMOGRAPHS

文章根据长周期地震观测的理论和我国763长周期台网的观测实践,分析了长周期观测中的环境干扰。认为长周期观测对环境干扰(主要指温、湿度)敏感,但影响长周期仪器正常工作的关键是潮湿,尤其是记录室的潮湿。文章以763台网优秀台站的观测实践为例,认为只要掌握了环境干扰的规律,在防潮问题上采取有效措施,长周期地震观测是完全可以做到仪器工作稳定,管理得心应手。

In this paper, the environmental interference to the observation with longperiod seismographs is analysed on the basis of the theory of long-period observation and the practice of the network of 763 long-period seismographs of China. It is realized that the long-period seismograph is sensitive to environmental interferece, chiefly the variations in temperature and humidity. After all, moisture, especially the moisture in the recording room, is the main factor which affects the normal operation of the instrument. By the way of introducing the pratice of some advanced stations, the article shows that it is possible to make the long-period seismograph work steadily and easy to handle, so long as the laws of the environmental interference is clearly understood and effective measures to prevent dampness is adopted.