Weekly Bulletin on Solar and Geomagnetic Activity
       Highlights on 20 - 26.08.2012,
        Forecast on 27.08 - 03.09.2012,
    Carrington Rotation 2127 (15,04.08.2012)

SUNSPOT ACTIVITY OF THE SUN REMAINED AT THE AVERAGE LEVEL. WEEKLY, THE 
AVERAGE OF SUNSPOT NUMBER  IN  THE INTERNATIONAL SYSTEM FOR THE PERIOD 
WAS MADE W=038+09/-09. ON THE VISIBLE SOLAR DISK CONSTANTLY THERE WERE 
4-5 SUNSPOT GROUPS  ONE OF WHICH, APPEARING  ON THE VISIBLE SOLAR DISK 
ON AUGUST 25, AVERAGE SIZES.

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

 FLARE ACTIVITY  WAS ON THE LOW LEVEL IN ALL DAYS. BY DATA OF SOHO AND 
STEREO CORONOGRAPHS FOR THE PERIOD IT WAS OBSERVED 63 CME AMONG WHICH 
ONE WAS TYPE "PARTIAL HALO III" AND 7 WERE "PARTIAL HALO II".
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FLARES  to   tm    te   c/p local. Class  E(1-8A)  AR   RII/IV  CME
                                  X / opt. J/m-2
DSF     to         te   c/p local.  l in deg.   Fl     AR      CME
22.08 >0851      <2310   N15E23L231       7              
22.08      1012         ~S18W72L326                     11549  
c/p local. - central part localization 
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ON THE FOLLOWING WEEK FLARE ACTIVITY IS EXPECTED ON THE LOW AND IN THE 
SECOND-HALF OF PERIOD, POSSIBLY, ON THE AVERAGE 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
óî -  N25L216 N20L216 S11L231 N03L239  26-27.08   5  KP, SDO, SOHO...
R - solar rotations; KP - KITT PEAK solar observatory;
EE-date of possible geomag. disturbation in the Earth's environment.
---------------------------------------------------------------------
 
 AFTER 24.08/1230 UT  EARTH IS IN "-" SECTOR INTERPLANETARY MAGNETIC 
FIELDS. THE FOLLOWING SECTOR BOUNDARY -/ + EARTH SHOULD PASS 02.09.

AUGUST    20     21     22     23     24     25     26    AUGUST
Wus      052    064    065    049    069    070    078 
F10.7    096    094    095    097    104    106    113 
èbcg    ÷1.9   ÷1.6   B1.4   ÷1.4   ÷1.5   ÷2.0   ÷2.7    GOES
Sp       090    140    110    230    200    520    590   
N                3             1      1      1            
IMF     + /-    -/+     +      +    + /-     -      -     ACE
Å>2   1.9å+7 7.1E+7 1.1E+8 3.2å+7 6.9å+7 5.4å+6 1.6E+7    GOES
Nm%                                                       THULE
Ap       11      6      5      11     8      9      13    áÒ
Dst                                                       ëIOTO
Amsc     12      7      9      12     10     11     13    IZMIRAN
--------------------------------------------------------------------

THE GREATER THAN 2 MeV ELECTRON FLUX AT GEOSTATIONARY ORBIT VERY HIGH 
LEVEL WAS OBSERVED 21 - 24 AUGUST.
 
THE GREATER THAN 2 MeV ELECTRON FLUX AT GEOSTATIONARY ORBIT VERY HIGH 
LEVEL IS EXPECTED 27 - 28 AUGUST.

GEOMAGNETIC ACTIVITY  WAS UNSETTLED AND QUIET.
   
NEXT WEEK THE GEOMAGNETIC CONDITIONS IS EXPECTED UNSETTLED AND QUIET.

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

P.S. The following highlight can publish on September 10.