NRO Heliograph Tohban's Report for Week 30 (20 July 1998 - 26 July 1998)

                                                      Tohban : K. Shibasaki
1. Solar Activity

   Solar activity enhanced due to the appearance of AR8280 from the
   south east limb on July 21st.  It accompanies bright compact component
   with high degree of circular polarization which coincides with the 
   preceding large sunspot (gyroresonance emission).  The following plage
   area produced LDE type flares on July 22nd (near the east limb) and
   on July 24th.  

    -----------------------------------------------------
      DAY      START      END    MAX.TIME   DUR.   PEAK  
    -----------------------------------------------------
    98/07/22  04:37:41  04:37:57  04:37:43     16    165  
    98/07/22  04:42:40  04:52:50  04:44:55    610     80  
    98/07/24  03:15:11  03:16:26  03:15:13     75    133  
    98/07/26  05:42:36  05:43:37  05:42:42     61     91  

2. Remarkable Events found by NRH

   A LDE type flare ocurred on July 22 around 04:45 UT.  The location
   was near the sourth east limb (AR8280).  The flare was preceded by
   a plasma ejection from the south end of the active region.
   On July 24 at 03:15 UT, a point like flaring occurred on the south 
   west limb (AR 8274) and then LDE type flare similar to the one on
   July 22 followed in the following plage region.

3. Next tohban (week 31)
      H. Nakajima