Weekly Bulletin on Solar and Geomagnetic Activity Highlights on 10 - 16.08.2020, Forecast on 17 - 24.08.2020, Carrington Rotation 2233; 2234 (11,49.08; 07,74.09.2020) Earth out of ecliptic (3.2 - 3.5) deg. (S22 - N28 is zone of geoeffectiveness) THE SUNSPOT-FORMING ACTIVITY REMAINED ON VERY LOW LEVEL. ESTI- MATED, MOST LIKELY WEEKLY AVERAGE VALUE OF THE RELATIVE SUNSPOT NUMBER IN THE INTERNATIONAL SYSTEM (old) FOR PERIOD W = 3+6/-3 (Wn=6+9/-6) ON VISIBLE SOLAR DISK IN SOUTH HEMISPHERE ONE SMALL SUNSPOT GROUP OF 25 SOLAR CYCLE HAVE BEEN OBSERVED. NEXT WEEK THE LEVEL OF SUNSPOT ACTIVITY WAS ON VERY LOW LEVEL. VISIBLE SOLAR DISK WITH HIGH PROBABILITY WILL BE SPOTLESS. LI- KELY 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 VERY LOW LEVEL. 8 SOLAR FLARE OF LOW X-RAY CLASS "B", 34 -"A", THREE CORONAL MASS EJECTIONS (14-16.08) 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 deg. 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. ---------------------------------------------------------------------- FROM 22.08/02 UT, THE EARTH IS IN THE "-" SECTOR OF THE INTERPLANE- TARY MAGNETIC FIELD. THE FOLLOWING THE NEXT SECTOR BOUNDARY "-/+" IT CAN EXPECT 19-26.08. ---------------------------------------------------------------------- á÷çõóô 17 18 19 20 21 22 23 á÷çõóô Wus 000 012 015 013 000 000 000 F10.7 071 071 071 070 071 070 071 èbcg 2 6.5E+6 2.7å+6 1.5E+6 1.4E+6 1.4E+6 1.1E+6 1.3å+6 GOES Ie>2 465 272 162 137 149 151 134 pfu Ap 3 7 6 3 4 8 7 nô Dst nô KIOTO Amsc 5 8 6 5 7 8 9 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 AT 5.08/1010 UT AND 10-12.08 HAVE BEEN OBSERVED. NEXT WEEK THE GREATER THAN 2 MeV ELECTRON FLUX AT GEOSYNCHRONOUS OR- BIT IS NOT EXPECTED. THE GEOMAGNETIC CONDITION REMAINED QUITE AND UNSETTLED ALL PERIOD. NEXT WEEK THE MOST PROBABLY QUIET AND UNSETTLED GEOMAGNETIC CONDI- TION 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