Weekly Bulletin on Solar and Geomagnetic Activity
               Highlights on 02 - 08.04.2018,
                Forecast on 09 - 16.04.2018,
          Carrington Rotation 2002 (22.92.03.2018)
           Earth out of ecliptic (-3.7 - -3.3 deg. 
           (S30 - N25 is ZONE OF geoeffectiveness)

THE SUNSPOT-FORMING ACTIVITY OF THE SUN WAS ON VERY LOW LEVEL,
THE VISIBLE DISK  WAS SPOTLESS  (60 DAYS ON THE CURRENT YEAR).
THE ESTIMATED, MOST LIKELY WEEKLY AVERAGE VALUE OF THE RELATI-
VE SUNSPOT NUMBER IN THE INTERNATIONAL SYSTEM  (old)  FOR THE 
PERIOD W=000 (Wn= 000).  

 NEXT WEEK THE LEVEL OF SUNSPOT ACTIVITY  WILL BE ON THE VERY 
LOW LEVEL AND SUN IS EXPECTED SPOTLESS WITH HYGH LIKELY. LIKE-
LY WEEKLY AVERAGE VALUE OF THE RELATIVE SUNSPOT NUMBER IN THE 
INTERNATIONAL SYSTEM (old) FOR THE NEXT WEEK IS W=010+10/-10.  

 FLARE ACTIVITY WAS ON THE VERY LOW LEVELS ON PERIOD.  NO EJECTA 
OF SOLAR FILAMENTS AND CORONAL MASS EJECTIONS HAVE BEEN OBSERVED.
----------------------------------------------------------------------
FLARES FROM M1 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 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.
óî  +  N60L228 N42L288  N16L208 N12L188 31000 02.04  >3     SOHO,SDO...
óî  +  N15L217 N12L223  S10L167 S05L160 31400 10.04   6  G0 SOHO,SDO...
The last CH is conglomerate from 4 - 6 separate CH;
Sch - CH Square in Mm**2 (in square megameters) near the central meri-
dian on http://sdowww.lmsal.com/suntoday/; n/d - no data;
R - solar rotations; EE-date of possible geomag. disturbance in the 
Earth's environment. G(0-5)-geoeffectivity in last solar rotation on
the middle latitudes. A-active geomagnetic condition.
------------------------------------------------------------------------

 AFTER 29.03/0090 UT EARTH IS IN "+" SECTOR OF INTERPLANETARY MAGNETIC
FIELD. NEXT SECTOR BOUNDARY +/- THE EARTH MUST PASS 11.04.

MARCH     26     27     28     29     30     31     01   APRIL
Wus      000    000    000    000    011    012    000 
F10.7    068    068    069    069    069    069    069 
èbcg   <á1.0  <á1.0  <á1.0  <á1.0  <á1.0   á2.0  <á1.0   GOES
Sp       000    000    000    000    010    010    000   msh   
N                                                   
IMF      ~/-    ~/-    -/~   -/+      -                  DSCOVR   
Å>2   3.4E+8 1.4E+9 2.3E+9 1.3å+9 4.6å+8 1.6å+8 1.0å+8   GOES
Ie>2    8088  42354  43686  35131  14850   9268   3767    pfu 
Ap        11     8      1      4      4      7      5    nô  
Dst                                                      nô KIOTO
Amsc      12     7      2      6      5      7      7   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 GOES15 in (electrons/cm2.s.sr) for events
> 1000 pfu.

THE GREATER THAN 2 MeV ELECTRON FLUX AT GEOSYNCHRONOUS ORBIT HAS 
BEGAN AT 16.03/0105 UT AND OBSERVED 16.03 - 4.04.  
 
 NEXT WEEK THE GREATER THAN 2 MeV ELECTRON FLUX AT GEOSYNCHRONOUS 
ORBIT IS EXPECTED 11 -16.04.

 GEOMAGNETIC CONDITION WAS UNSETTLED AND QUIET.   

NEXT WEEK IN THE PERIOD FROM 10 TILL 12.04 GEOMAGNETIC CONDITION 
IS EXPECTED ACTIVE IN RESPONSE TO PASSING OF THE HIGH-SPEED STRE-
AM BY THE EARTH  FROM THE LARGE TRANS-EQUATORIAL CH  EXTENDED ON 
HELIOLATITUDE.  PROBABILITY OF MAGNETIC STORMS IS 60%.  IN OTHER 
DAYS THE GEOMAGNETIC CONDITION SHOULD BE UNSETTLED AND QUIET.

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