Weekly Bulletin on Solar and Geomagnetic Activity Highlights on 03 - 09.08.2020, Forecast on 10 - 17.08.2020, Carrington Rotation 2233; 2234 (11,49.08; 07,74.09.2020) Earth out of ecliptic (2.7 - 3.1) deg. (S25 - N25 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 = 9+5/-2 (Wn = 14+9/-11). ON VISIBLE SOLAR DISK 3 SMALL SUNSPOT GROUP OF 25 SOLAR CYCLE HAVE BEEN OBSERVED. 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=020+10/-10. FLARE ACTIVITY WAS AT VERY LOW LEVEL. 1 SOLAR FLARE OF LOW X-RAY CLASS "C"; 10 - "B", 19 - "A", TWO EJECTIONS OF SOLAR FILAMENTS AND 1 CORONAL MASS EJECTION (4.08) 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 04.08 >0605 >1233 N43E59L138 38 05.08 >0945 >2320 N35W42L028 5 -------------------------------------------------------------------- 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 29.07/1410 UT, THE EARTH IS IN THE "+" SECTOR OF THE INTERPLANE- TARY MAGNETIC FIELD. THE FOLLOWING THE NEXT SECTOR BOUNDARY "+/-" IT CAN EXPECT 19-20.08. ---------------------------------------------------------------------- éàìø 03 04 05 06 07 08 09 éàìø Wus 023 012 013 014 014 011 013 F10.7 073 073 073 073 074 075 074 èbcg A3.9 A3.4 A4.0 A3.3 A3.3 A3.2 A2.8 GOES Sp 070 050 160 070 070 050 030 msh N 1 IMF + + + + + + + DSCOVR Å>2 2.3E+6 2.7å+7 9.9E+7 1.0E+8 1.2E+8 1.1E+8 1.3å+8 GOES Ie>2 169 946 2815 1974 1683 2171 2502 pfu Ap 16 8 5 5 4 5 2 nô Dst nô KIOTO Amsc 16 8 5 5 4 5 3 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 5-10.08 HAVE BEEN OBSERVED. NEXT WEEK THE GREATER THAN 2 MeV ELECTRON FLUX AT GEOSYNCHRONOUS OR- BIT IS EXPECTED 10-12.08. THE GEOMAGNETIC CONDITION REMAINED QUITE AND UNSETTLED ALL PERIOD BUT MAGNETIC SUBSTORM (G0,~3 h.) OBSERVED AT 3.08 ON BOULDER CENTER AT EARLY DAY AND ACCORDING IZMIRAN DATA SIMILAR DISTURBANCE OBSERVED AT END OF DAY. 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