Weekly Bulletin on Solar and Geomagnetic Activity
                  Highlights on 19 - 25.10.2015,
                   Forecast on 26.10 - 02.11.2015,
            Carrington Rotation 2169 (04,57.10.2015) 
  
 SUNSPOT-FORMING ACTIVITY OF THE SUN REMAINED AT THE MIDDLE LEVEL. 
ESTIMATED,  WEEKLY AVERAGE VALUE OF THE RELATIVE SUNSPOT NUMBER IN 
THE INTERNATIONAL SYSTEM (old) WAS W = 49+7/-11 (Wn=78+12/-18). ON 
THE VISIBLE SOLAR DISK HAVE BEEN OBSERVED 6-4 SMALL, QUITE SUNSPOT 
GROUPS. 
 
THE MIDDLE AND THE LOW LEVELS OF THE SUNSPOT-FORMING ACTIVITY IS EX-
PECTED ON THE NEXT WEEK. AS ESTIMATED, THE MOST LIKELY WEEKLY AVERA-
GE VALUE OF THE RELATIVE SUNSPOT NUMBER IN THE INTERNATIONAL SYSTEM
FOR THE NEXT WEEK IS W = 030+10/-20. SPOTLESS DAYS ARE POSSIBLE.

 FLARE ACTIVITY WAS AT A LOW LEVEL ALL DAYS,  EXCEPT OCTOBER 23 AND 
25.10 WHEN IT BECAME VERY LOW. THERE WERE TWO SOLAR FILAMENT EJECTI-
ON OCCURRENCES THROUGH THE PERIOD.  ACCORDING TO THE DATA FROM SOHO 
AND STEREO CORONOGRAPHS >10 CMEs HAVE BEEN OBSERVED.

-----------------------------------------------------------------------
FLARES   to   tm   te    c/p local.Class    E(1-8A)  AR   RII/IV   CME
                                   X-ray/Ïp  J/m-2
DSF     to      te   ËÏÏÒÄÉÎÁÔÙ    l × ÇÒÁÄ.   Fl     Aï        CME
20.10 >0956 <2225  N15E12L137      7
21.10 >1910 <1415  N35W23L159     19
------------------------------------------------------------------------

 NEXT WEEK FLARE ACTIVITY IS EXPECTED ON THE LOW AND THE VERY LOW 
LEVELS. 

ON THE VISIBLE SOLAR DISK THE FOLLOWING CORONAL HOLES WERE OBSERVED:
------------------------------------------------------------------------
  sign  N end   Å end   S end   W end     EE      R  G   Observatories
CH  -   N15L180 N10L168 N00L183 N04L187  21.10   3      SDO, SOHO...
CH  -   N20L152 N19L151 N12L157 N15L167  22.10   3      SDO, SOHO...
On the last rotation these CH were one.
R - solar rotations; KP - KIT PEAK solar observatory.
EE-date of possible geomag. disturbance in the Earth's environment.
G - geoeffectivity in last solar rotation. 
A-active geomagnetic condition.
------------------------------------------------------------------------

AFTER 25.10/0730 UT THE EARTH IS IN "+" SECTOR OF THE INTERPLANE-
TARY MAGNETIC FIELD. 19 - 25.10 THE EARTH WAS IN "-" SECTOR. THE 
FOLLOWING +/-  THE EARTH HAS TO PASS SECTOR BOUNDARY 27.10, AND 
IS FINAL IN "+" SECTOR THE EARTH WILL ENTER 29.10.

OCTOBER  19     20     21     22     23     24     25     OCTOBER
Wus     094    077    073    094    091    074    063  
F10.7   124    123    129    121    115    106    106
èbcg   ÷4.1   ÷4.3   B4.8   B4.1   B3.6   B3.2   B3.4      GOES
Sp      580    520    510    470    410    320    280  msh   
N                             2            
IMF     +/-     -      -      -      -      -     -/+       áóå   
Å>2  1.4å+7 3.4å+7 1.3å+7 1.4å+7 1.1+7 1.1E+7  2.7E+6       GOES
Ie>2    332   1254     658   806   376    346     111  pfu  GOES 
Ap       3      10      12    7     8      11      8   nT  BOULDER 
Dst                                                    nT  KIOTO 
Amsc     8      15      12    11     10     11     10  nT  IZMIRAN 
-----------------------------------------------------------------
Å>2 - Daily Electron Fluency e/(cm2-ster-day) with E>2 MeV.
Ie>2 - the maximum intensity of electron flux in geostationary orbits 
in days according to GOES 15 in (electrons/cm2-s-sr) for events
> 1000 pfu.

THE GREATER THAN 2 MeV ELECTRON FLUX AT GEOSYNCHRONOUS ORBIT WAS BE-
GINNING AT 20.10/1425 UT AND WAS OBSERVED 20.10 ONLY.
THE GREATER THAN 2 MeV ELECTRON FLUX AT GEOSTATIONARY ORBIT OF VERY 
HIGH LEVEL IS NOT EXPECTED.

GEOMAGNETIC CONDITION WAS UNSETTLED AND QUITE.

NEXT WEEK THE GEOMAGNETIC CONDITION IS EXPECTED UNSETTLED AND QUITE.

HIGHLIGHT AND FORECAST COMPOSED FROM DATA:
NOAA SWPC, BOULDER, USA               http://www.swpc.noaa.gov,
THE SOLAR INFLUENCES DATA ANALYSIS CENTRE, 
SIDC, BRUSSELS, BELGIUM               http://sidc.oma.be/index.php3, 
THE IZMIRAN, MOSCOW, TROITSK, RUSSIA  http://www.izmiran.ru