Weekly Bulletin on Solar and Geomagnetic Activity Highlights on 02 - 08.03.2020, Forecast on 09 - 16.03.2020, Carrington Rotation 2228 (01,03.03.2020) Earth out of ecliptic (-6.6 - -7.0) deg. (S35 - N20 is zone of geoeffectiveness) THE SUNSPOT-FORMING SOLAR ACTIVITY REMAINED VERY LOW WITH A SPOTLESS VISIBLE DISK, EXEPT 09.03 (556 SPOTLESS DAYS IN THE 2020). ESTIMATED, MOST LIKELY WEEKLY AVERAGE VALUE OF THE RE- LATIVE SUNSPOT NUMBER IN THE INTERNATIONAL SYSTEM (old) FOR PERIOD W= 1+1\-1 (Wn= 2+0\-2). THE ACTIVE REGION OF 25 CYCLE WAS FORMED ON THE VISIBLE DISC 5.03 AND BY 8 - 9.03 A SMALL SUNSPOT GROUP FORMED THE SUNSPOT IN IT WAS OBSERVED ONLY ON 8 - 9.03, BUT IN THE SPOTLESS CONDITION, CONTINUES TO BE OB- SERVED DURING THE PREPARATION OF THE REVIEW. 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. NO SOLAR FLARE, SO- LAR FILAMENT EJECTION AND TWO CORONAL MASS EJECTIONS SUBSTANCE (14.03) ARE VERY NARROW (~20 deg.) AND FAST (V>1500 km) WAS OB- SERVED OVER THE PERIOD. ------------------------------------------------------------------- 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. ---------------------------------------------------------------------- AFTER 12.03/20 UT THE IMF SECTOR SIGN WAS "-". NEXT WEEK THE BEHAVIOR OF THE SECTOR STRUCTURE SIGN WILL NOT CHANGE. NEXT IMF SECTOR BOUNDER THE EARTH WILL PASS AT 26.03. ----------------------------------------------------------------------- MARCH 09 10 11 12 13 14 15 MARCH Wus 012 000 000 000 000 000 000 F10.7 071 071 071 070 069 068 070 èbcg 2 1.4E+6 1.4å+6 1.5E+6 1.3E+6 1.2E+6 1.3E+6 1.4å+6 GOES Ie>2 173 137 175 264 129 135 156 pfu Ap 5 4 3 7 7 3 5 nô Dst nô KIOTO Amsc 8 4 4 8 6 3 4 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 OBSERVED. NEXT WEEK THE GREATER THAN 2 MeV ELECTRON FLUX AT GEOSYNCHRONOUS OR- BIT IS EXPECTED AFTER 19.03. THE GEOMAGNETIC CONDITION AT MID-LATITUDES REMAINED QUITE AND UNSET- TLED ALL DAYS. 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