Abstract:

During 22:00UT,Jan.25 to 10:00UT,Jan.28,1997,a 60 hour continuous stable disturbance was recorded by Lacoste & Romberg earth tide gravity meter (ET21) installed at Zhongshan Station,Antarctica.Its maximum amplitude is ±3μgal.After removing the possibility of malfunction of the instrument and any interference from outside,they determined this is a rare,integral and characteristic “geophysical event”. Since Jan.25,The “event” subsequently occurred on Feb.9,19,23,Mar.29,May.8 After analyzing and studying these data,I tentatively concluded the event was caused by the abnormal disturbance of the matter inside the earth's core. They temporally called the phenomenon which firstly discover at Antarctica FDEC(Free Disturbance of the Earth's Core).