NRO Heliograph Tohban's Report for Week 51 (13 Dec 1999 - 19 Dec 1999)

                                                    Tohban : H. Nakajima

1. Solar Activity

The Sun was quiet during the whole week.

  NoRH event list of week 51
______________________________________________________________________
   Date      Start     Peak      End      Dur    Max Cor. / GOES NOAA  
              (UT)     (UT)      (UT)    (sec)  (x 10^-4) /           
1999-12-15 04:00:06  04:00:16  04:01:42     96          7 /                 
1999-12-15 04:18:56  04:18:59  04:20:32     96          7 /                 
1999-12-16 01:17:13  01:17:14  01:17:25     12          7 /                 
1999-12-16 03:11:39  03:11:43  03:22:56    677          8 / C2.5            
1999-12-16 06:03:36  06:04:20  06:05:04     88          7 /                 
1999-12-17 00:17:33  00:17:59  00:19:20    107         84 / C7.0            
1999-12-17 00:19:38  00:19:57  00:20:53     75         63 / C7.0            
1999-12-17 00:22:05  00:22:17  00:22:53     48         20 / C7.0            
1999-12-17 01:14:22  01:14:23  01:17:10    168         16 /                 
1999-12-17 05:36:10  05:36:29  05:41:26    316         71 / C6.8            
1999-12-18 01:28:16  01:28:23  01:29:20     64        118 / C9.4       

2. Remarkable Events found by NoRH
   
------------------------------------------------------------------------
   DATE      START    MAX.TIME    END    Max Cor.    GOES   
              (UT)        (UT)    (UT)  (x 10^-4)    class   Note
------------------------------------------------------------------------
1999-12-16 03:21                  03:51             Prominence eruption
1999-12-08 05:01                  05:51             Prominence eruption
------------------------------------------------------------------------

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

3. Observing log

   No trouble

4. Next tohban (week 52)

  Y. Hanaoka