Weekly Bulletin on Solar and Geomagnetic Activity
                 Highlights on 17 - 23.12.2018,
                  Forecast on 24 - 30.12.2018,
   Carrington Rotation 2211, 2212 (23,17.11; 20,5.12.2018)
            Earth out of ecliptic (-1.1 - -2.0) deg. 
             (S25 - N25 is zone of geoeffectiveness)

 THE SUNSPOT-FORMING ACTIVITY OF THE SUN  WAS AT THE VERY LOW LEVEL, 
THE SUN  WAS SPOTLESS (213 SPOTLESS DAYS AT 2018). ESTIMATED,  MOST 
LIKELY  WEEKLY AVERAGE VALUE OF THE RELATIVE SUNSPOT NUMBER  IN THE 
INTERNATIONAL SYSTEM (old) FOR PERIOD W=000 (Wn=000). 

NEXT WEEK THE LEVEL OF SUNSPOT ACTIVITY WILL REMAIN AT VERY LOW LEVEL.
LIKELY WEEKLY AVERAGE VALUE OF THE RELATIVE SUNSPOT NUMBER  IN THE IN-
TERNATIONAL SYSTEM (old) FOR THE NEXT WEEK IS W= 010+10/-10. 

THE FLARE ACTIVITY WAS ON THE VERY LOW LEVEL. NO FILAMENT EJECTION AND 
THREE CORONAL MASS EJECTIONS HAVE BEEN OBSERVED.
-----------------------------------------------------------------------
FLARES >M1 X-RAY CLASSES
        to   tm    te   local.    Class   E(1-8A)  AR   RII/IV CME
                                X-ray/Ïp   J/m-2
DSF     to      te  localization   l × ÇÒÁÄ.  Fl    AR    CME/to
17.12 0657  2235  N09E29L069       85
-------------------------------------------------------------------------

NEXT WEEK THE FLARE ACTIVITY IS EXPECTED AT VERY LOW LEVELS.

ON THE VISIBLE SOLAR DISK THE FOLLOWING CORONAL HOLES WERE OBSERVED:
------------------------------------------------------------------------
  sign N end   E end   S end   W end    Sch    EE   R  G  Space Obser. 
CH +   N20L332 N10L337 S05L308 S00L299  5.1% 27.12 R10 -  SDO, SOHO...
Sch - CH Square in % solar hemisphere near the central meridian on 
https://www.solarmonitor.org/; n/d - no data; R - solar rotations; 
EE-date of possible geomagnetic disturbance in the Earth's environment. 
G(0-5)-geoeffectivity in last solar rotation on the middle latitudes. 
A-active geomagnetic condition.
------------------------------------------------------------------------

 AFTER 8.12/21 UT EARTH IS IN "-" SECTOR OF THE INTERPLANETARY MAGNE-
TIC FIELD. NEXT SECTOR BOUNDARY -/+ THE EARTH MUST PASS 01.01.

--------------------------------------------------------------------- 
äåëáâòø  17     18     19     20     21     22     23   äåëáâòø
Wus     000    000    000    000    000    000    000  
F10.7   070    070    070    070    070    071    070  
èbcg   á0.0   á1.0   á1.0   á1.2   á1.0  <á1.0  <á1.0   GOES
Sp      000    010    000    000    010    000   000    msh   
N                                              
IMF      -      -      -      -      -      -     -     DSCOVR   
Å>2  3.7E+7 4.7E+7 6.5E+6 6.0å+6 1.3å+7 1.4E+7 1.7E+7   GOES
Ie>2   1200    170    179   184     279    268    383   pfu 
Ap       6      7      6     11      4      2      2    nô  
Dst                                                     nô KIOTO
Amsc     6      8      4     9       5      3      2    nô IZMIRAN 
--------------------------------------------------------------------
Å>2 - Daily Electron Fluency e/(cm2-ster-day) with E>2 MeV.
Ie>2 - the maximum intensity of electron flux in geostationary or-
bits 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 BEGAN 
 10.12 AND OBSERVED 10-17.12.  
 
NEXT WEEK THE GREATER THAN 2 MeV ELECTRON FLUX AT GEOSYNCHRONOUS OR-
BIT IS NOT EXPECTED.

 THE GEOMAGNETIC CONDITION AT MID LATITUDES  REMAINED UNSETTLED AND 
QUITE.

 THE NEXT WEEK IS MOST PROBABILITY OF QUIET AND UNSETTLED GEOMAGNE-
TIC CONDITION AT MID LATITUDES. 
 
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
                                                          V. Ishkov