Weekly Bulletin on Solar and Geomagnetic Activity
Highlights on 12 - 18.12.2011,
Forecast on 19 - 26.12.2011,
Carrington Rotations 2017, 2118 (16,30.11, 13,61.12.2011)

SOLAR SUNSPOT ACTIVITY OF THE LAST PERIOD  WAS ON AVERAGE, AND 
15.11 ON LOW LEVELS. ESTIMATED,  RATING, WEEKLY AVERAGE OF SUN-
SPOT NUMBER IN THE INTERNATIONAL SYSTEM FOR THE PERIOD  WAS MA-
DE W=044+18/-18. ON THE VISIBLE DISK OF THE SUN CONSTANTLY THE-
RE ARE FROM 7 TO 3 SMALL AND QUIET SUNSPOT GROUPS. 

 NEXT WEEK THE LEVEL OF SUNSPOT ACTIVITY  IS EXPECTED TO BE THE 
AVERAGE. THE CALCULATED MOST LIKELY WEEKLY AVERAGE VALUE OF SUN-
SPOT NUMBER IN THE INTERNATIONAL SYSTEM FOR THE NEXT PERIOD W=
050+10/-20.

 FLARE ACTIVITY WAS ON A LOW AND VERY LOW (16.12) LEVELS ALL DAYS. 
SOHO CORONOGRAPH HAVE REGISTRED 43 CME FROM WHICH WAS 4 WERE TYPE 
"PARTIAL HALO" II.

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      to   tm    te    localiz.   Class  E(1-8A)  AR   RII/IV  CME
                                  X/opt. J/m-2             

DSF     to      te     c/p localiz. l in deg.  Fl  AR        CME
c/p localiz. - central part localization 
---------------------------------------------------------------------

NEXT WEEK FLARE ACTIVITY IS EXPECTED ON LOW AND VERY LOW LEVELS.
 
ON THE VISIBLE SOLAR DISK DURING THE LAST WEEK THE FOLLOWING CORONAL 
HOLES WERE OBSERVED :
---------------------------------------------------------------------
  sign N end   Å end   S end   W end     EE    R   Observatories
CH -  S19L022 S26L014 S28L017 S22L021   14.12   1  SDO, SOHO, ....
R - solar rotations; KP - KITT PEAK solar observatory;
EE-date of possible geomag. disturbation in the Earth's environment.
---------------------------------------------------------------------

WITH 8.12/19 ON 17/11 UT THE EARTH WAS IN "-" SECTOR OF THE INTERPLA-
NETARY MAGNETIC FIELD. POSSIBLY IT IS SIMPLE THE ISLAND "+" SECTOR AS 
ALREADY 19.12 IN 04 UT THERE IS A HINT ON RETURNING IN "-" SECTOR. THE 
FOLLOWING SECTOR BOOUNDERY - /+ THE EARTH SHOULD PASS ON 26.12.

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DECEMBER  12     13     14     15    16     17     18    DECEMBER
Wus      070    077    065    044    060    095    103     
F10.7    132    133    132    124    121    120    128     
èbcg    ÷5.0   ÷5.1   ÷8.3   ÷3.2   ÷2.5   ÷2.3    ÷3.2  GOES
Sp       530    280    280    280    250    250    270 
Nnew      0      1      1             1      2      2             
IMF       -      -      -      -      -      -      +    ACE
Å>2   3.8å+6 3.2å+6 3.8å+6 4.4E+6 4.8å+6 5.1å+6 3.6å+6   GOES
Nm%                                                      THULE
Ap       3      2       4      0      0      0      1    áÒ
Dst                                                      KIOTO
Amsc     11     9       8      7      7      7      7    IZMIRAN
---------------------------------------------------------------

THE GREATER THAN 2 MeV ELECTRON FLUX AT GEOSYNCHRONOUS ORBIT VERY 
HIGH LEVEL OF FLUX WAS NOT OBSERVED.

THE GREATER THAN 2 MeV ELECTRON FLUX AT HIGH LEVEL IS NOT EXPECTED. 

ALL PERIOD GEOMAGNETIC CONDITIONS WERE UNSETTLED AND QUIET.

NEXT WEEK GEOMAGNETIC CONDITIONS IS EXPECTED REMAINED QUIET AND 
UNSETTLED. 


HIGHLIGHT AND FORECAST COMPOSED FROM DATA
OF NOAA SWPC            http://www.sec.noaa.gov,
OF THE SOLAR INFLUENCES DATA ANALYSIS CENTER - 
SIDC, BELGIUM           http://sidc.oma.be/index.php3, 
OF THE IZMIRAN, RUSSIA  http://www.izmiran.ru