Weekly Bulletin on Solar and Geomagnetic Activity
       Highlights on 21 - 27.05.2012,
        Forecast on 28.05 - 04.06.2012,
Carrington Rotations 2123 2124 (28,19.04; 25,42.05.2012)
 
 SUNSPOT ACTIVITY OF THE SUN ENTIRE PERIOD OF LAST WEEK WAS AT THE 
AVERAGE LEVEL. WEEKLY, THE AVERAGE OF SUNSPOT NUMBER IN THE INTERNA-
TIONAL SYSTEM FOR THE PERIOD WAS MADE W=055+17/-13. ON THE VISIBLE 
DISK OF THE SUN WERE PRESENT 7-6 SMALL QUIET SUNSPOT GROUP.

 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 W=060+20/-10.

FLARE ACTIVITY  WAS AT LOW LEVEL ALL DAYS. BY DATA OF SOHO AND STEREO 
CORONOGRAPHS FOR THE PERIOD IT WAS OBSERVED 25 CME ON AMONG WHOM WERE 
ONE OF HALO TYPE (FROM BACKSIDE PROTON FLARE EVENT).

-------------------------------------------------------------------
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
22.05       0205             SW                           óíå/0609
c/p local. - central part localization 
--------------------------------------------------------------------

NEXT WEEK FLARE ACTIVITY IS EXPECTED ON 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
CH -  N30L028 N28L023 N15L033 N25L048   25.05   5   KP, SDO, SOHO...
CH +  N62L315 N35L272 N25L320 N42L355           1   KP, SDO, SOHO..
low latitude part CH          N25L325  30-31.05 
R - solar rotations; KP - KITT PEAK solar observatory;
EE-date of possible geomag. disturbation in the Earth's environment.
---------------------------------------------------------------------

AFTER 21.05/08 UT EARTH IS IN "-" SECTOR INTERPLANETARY MAGNETIC FIELDS, 
HOWEVER IN PERIOD 24/1235 - 26/10 UT IT WAS OBSERVED MAINLY "+" SECTOR. 
THE FOLLOWING SECTOR BOUNDERY + /- THE EARTH SHOULD PASS 29.05.

MAY       21     22     23     24     25     26     27    MAY
Wus      120    095    091    096    086    070    083
F10.7    125    121    117    116    117    110    111
èbcg    B3.1   ÷3.0   B3.1   ÷4.4   ÷4.4   ÷3.6   ÷2.8    GOES
Sp       870    780    650    500    530    410    400
Nnew             1      1             2               
IMF     +/ -     -      -     -/+  +/-/+    +/-     -     ACE
Å>2   7.6å+6 5.8E+6 4.4E+6 1.1å+8 6.1å+7 1.0å+8 1.3å+8    GOES
Nm%                                                       THULE
Ap       7       15     18     7      6      4      3     áÒ
Dst     -1      -23    -35    -18    -15    -10     1     ëIOTO
Amsc     11      20     16     8      7      7      7     IZMIRAN
--------------------------------------------------------------------

SOLAR PROTON EVENT S1 WAS OCCURED AFTER BACKSIDE FLARE EVENT:
Pr (E>10 MeV), to -27/0535; tmax - 27/1045 -14 p.f.u.; te-27/1235 UT;

THE GREATER THAN 2 MeV ELECTRON FLUX AT GEOSTATIONARY ORBIT VERY HIGH 
LEVEL WAS OBSERVED FROM 24.05/1235 UT 44 - 27.05.
 
THE GREATER THAN 2 MeV ELECTRON FLUX AT GEOSTATIONARY ORBIT VERY HIGH 
LEVEL IS EXPECTED 28 - 29.05.

LAST WEEK THE CONDITIONS OF MINOR MAGNETIC STORM (G1, Ams = 29, dur.=
15 h.) ACCORDING THE BOULDER CENTER DATA (G0, Ams=25, dur.= 21 h.) ON 
IZMIRAN DATA ARE NOTED 24 - 25.05. IN OTHER DAYS THE GEOMAGNETIC CON-
DITION 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