AN EFFECTIVE DEVICE AGAINST THUNDER-BOLT

The ways of thunder and light destroying seismostations are summarized.There was a light rod at Changping station, but it did not work well in protecting the station from thunder and light.The principle and advantages of a new device against thunder bolt with capacity earth connection is introduced.The devices were installed at 42 stations in Beijing City and Fujian, Zhejiang, Sichuan, Liaoning, Guangxi, Guangdong, Hainan, Shaanxi, Hebei Provinces.Facts have proved that the devices are satisfactory.