NRO Heliograph Tohban's Report for Week 48 (22 Nov 1999 - 28 Nov 1999)

                                                    Tohban : T. Yokoyama

1. Solar Activity

Radio solar activity was high. There were
3 strong (127, 62, 139 SFU @17GHz) events.
They were moderately well resolved with NoRH
and had intresting spectral structure.
Other than these, there were 10 weaker events (< 10 SFU).
Almost all these events occured in AR 8771 and its surrounding ARs.
Moreover huge prominence erupution was observed near the south polar.

2. Remarkable Events found by NoRH
   
------------------------------------------------------------------------
   DAY       START    MAX.TIME      END   Flux(SFU)    GOES   
              (UT)        (UT)      (UT)  17 /34GHz    class   Note
-------------------------------------------------------------------------
1999-11-22  02:54:08  02:54:39  03:06:49  127/ 38      C2.9    flare
1999-11-24  22:37:51  23:29:39  00:26:13   62/ 12              flare
1999-11-26  01:18:52  01:20:03  03:19:55  139/ 31      M5.7    flare
1999-11-28  00:40               03:20                          eruption
------------------------------------------------------------------------

* 1999-11-26 flare
   has long radio loop with nearly 100,000 km long,
   and shows maybe non-thermal sources at the both ends.

   (http://solar.nro.nao.ac.jp/~tohban/event/)


3. Observing log

   No trouble

4. Next tohban (week 49)

  Te. Watanabe