NRO Heliograph Tohban's Report for Week 25 (15 June 1998 - 21 June 1998) Tohban : Y. Hanaoka 1. Solar Activity Activity was generally low, and only a C-class flare occurred during the Radioheliogrph's observing window on June 21. It was not remarkable at 17 GHz. 2. Remarkable Events found by NRH Two prominence eruptions were observed. The first one on June 15 occurred at the SW limb near the end of observation. The movie of LASCO images show a CME, which started at 06:55UT. Probably this CME is associated with the prominence eruption. Another small prominence eruption was observed on June 17.