Weekly Bulletin on Solar and Geomagnetic Activity Highlights on 13 - 19.07.2020, Forecast on 20 - 27.07.2020, Carrington Rotation 2233 (15.28.07.2020) Earth out of ecliptic (1.5 - 1.9) deg. (S25 - N25 is zone of geoeffectiveness) THE SUNSPOT-FORMING ACTIVITY REMAINED ON VERY LOW LEVEL. THE SUN's VISIBLE DISK WAS SPOTLESS 20.09 ONLY (153 SPOTLESS DAYS AT 2020). ESTIMATED, MOST LIKELY WEEKLY AVERAGE VALUE OF THE RELATIVE SUNSPOT NUMBER IN THE INTERNATIONAL SYSTEM (old) FOR PERIOD W =6+1/-6 (Wn=9+2/-9). ON VISIBLE SOLAR DISK ONE SMALL SUNSPOT GROUP OF 25 SOLAR CYCLE. 27.09 ON VISIBLE SOLAR DISK, FROM E-LIMB IN NORTHERN HEMISPHERE A NEW SUNSPOT GROUP WAS AP- PEARED. BOTH WAS BURNING ON BACK SIDE SOLAR DISK. 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 VERY LOW X-RAY CLASS "B", 12 - CLASS "A", 1 SOLAR FILAMENT EJECTION (DSF) AND 2 CORONAL MASS EJECTION (25.07) 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 24.07 >0709 >0847 S17E45L273 10 12767 -------------------------------------------------------------------- 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 23.07/2000 UT, THE EARTH IS IN THE "-" SECTOR OF THE INTERPLANE- TARY MAGNETIC FIELD. THE FOLLOWING THE NEXT SECTOR BOUNDARY "-/+" IT CAN EXPECT 29.07. ---------------------------------------------------------------------- JULY 20 21 22 23 24 25 26 JULY Wus 000 011 011 011 011 011 011 F10.7 069 070 070 070 070 070 071 èbcg >A1.0 A1.2 A1.0 A1.0 A1.0 2 4.8E+6 4.8å+6 5.0E+6 4.3E+6 1.5E+6 3.8E+6 5.0å+6 GOES Ie>2 267 268 317 232 221 353 260 pfu Ap 4 3 3 4 11 15 3 nô Dst nô KIOTO Amsc 4 4 3 4 11 12 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 NOT OB- 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