Weekly Bulletin on Solar and Geomagnetic Activity
               Highlights on 20 - 26.01.2020,
                Forecast on 27.01 - 03.02.2020,
          Carrington Rotation 2226 (06,38.01.2020)   
           Earth out of ecliptic (-1.9 - -2.2) deg. 
              (S27 - N23 is zone of geoeffectiveness)

 THE SUNSPOT-FORMING SOLAR ACTIVITY  REMAINED VERY LOW WITH A
SPOTLESS VISIBLE DISK 20-23.01 (16 SPOTLESS DAYS IN THE 2020). 
ESTIMATED,  MOST LIKELY WEEKLY AVERAGE VALUE  OF THE RELATIVE  
SUNSPOT NUMBER  IN THE INTERNATIONAL SYSTEM (old)  FOR PERIOD 
W=4+7/-4 (Wn= 6+11/-6). ON VISIBLE SOLAR DISC ONE SMALL, BUT 
ACTIVE FOR LATE PHASE OF MINIMUM, SUNSPOT GROUP OF CURRENT SO-
LAR CYCLE. 

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

FLARE ACTIVITY WAS AT THE VERY LOW LEVEL-NINE SOLAR FLARE (CLAS-
SES B AND A) AND THREE CORONAL MASS EJECTIONS (20, 22.01) 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
--------------------------------------------------------------------

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

ON THE VISIBLE SOLAR DISK THE FOLLOWING CORONAL HOLES WERE OBSERVED:
---------------------------------------------------------------------
 sign  N end   E end   S end   W end   Sch    EE    R  G  Spacecraft
* - low geoeffectivity, the substorms with duration <6 h. only.
Sch - CH area 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. 
----------------------------------------------------------------------

 19.01/04 UT THE IMF SIGN  WAS "+" AND UNSTABLE. NEXT WEEK THE BEHAVIOR 
OF THE SECTOR STRUCTURE SIGN WILL NOT CHANGE. FORECAST OF A SUSTAINABLE 
SECTOR BOUNDARY  IS NOT POSSIBLE BECAUSE OF THE CONSTANT VARIABILITY OF 
THE IMF SIGN IN THE CONDITIONS OF A DEEP MINIMUM CYCLE PHASE.

----------------------------------------------------------------------- 
JANUARY  20     21     22     23     24     25     26   JANUARY
Wus     000    000    000    000    012    014    018
F10.7   071    071    072    071    071    073    075 
èbcg  A<1.0  A<1.0  A<1.0   A1.3   A1.0  A<1.0   A1.4   GOES
Sp      000    000    000    000    010    020    060   msh   
N                                    1             
IMF     -/+     +      +      +      +      +     +     DSCOVR   
Å>2  4.2E+6 4.2å+6 3.8E+6 3.4E+6 3.6E+6 3.8E+6 3.7E+6   GOES
Ie>2    212    133    143    143    175    176    136   pfu 
Ap       2      6      6      5      3      3      4    nô  
Dst                                                     nô KIOTO
Amsc     6      9      9      8      6      5      6    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 NOT OB-
SERVED. 
 
NEXT WEEK THE GREATER THAN 2 MeV ELECTRON FLUX AT GEOSYNCHRONOUS OR-
BIT IS NOT EXPECTED.

THE GEOMAGNETIC CONDITION AT MID-LATITUDES REMAINED QUIET AND UNSETT-
LED.

 NEXT WEEK THE MOST PROBABLY QUIET AND UNSETTLED GEOMAGNETIC CONDITION 
WILL OBSERVED.


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