SYNTHETIC OBSERVATION AND ANALYSES OF THE STRONG FLARE EVENTS OCCURRED IN AUGUST,1989

From 31, July to 9,Sep., 1989, VLF Omega signals have been received at Xinxiang, Lintong and Urumqi respectively. The chromospheric photograph and ionograms also have been obtained in Urumqi. The paper analyzes the ionosphere effect of these flare events by synthetically utilizing VLF observation data of the three sites, the chromosphere data,ionosphere surveyning data and X-ray data of satellite GOES-7 of U.S.A.