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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".
------------------------------------------------------------------------
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
-------------------------------------------------------------------------

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 Х end S end W end EE R Observatories
?ю - 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
шbcg ?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
Х>2 1.9х+7 7.1E+7 1.1E+8 3.2х+7 6.9х+7 5.4х+6 1.6E+7 GOES
Nm% THULE
Ap 11 6 5 11 8 9 13 св
Dst ыIOTO
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.