Weekly Bulletin on Solar and Geomagnetic Activity Highlights on 20 - 26.11.2017, Forecast on 27.11 - 04.12.2017, Carrington Rotation 2197 (03,61.12.2017) Earth above the ecliptic (3.0 - 2.5) deg. (S30 - N24 is geoeffectiveness zone) SUNSPOT-FORMING ACTIVITY WAS ON THE VERY LOW LEVEL. THE SUN WAS SPOTLESS ON 20-24.11 (87 SPOTLESS DAYS IN THE CURRENT YEAR). THE ESTIMATED, MOST LIKELY WEEKLY AVERAGE VALUE OF THE RELATIVE SUNSPOT NUMBER IN THE INTERNATIONAL SYSTEM (old) FOR THE PERIOD W=002+7/-2 (Wn= 004+10/-4). ON THE VISIBLE SOLAR DISK ONE SMALL AND QUITE SUNSPOT GROUP HAVE BEEN OBSERVED. NEXT WEEK THE LEVEL OF SUNSPOT-FORMING ACTIVITY WILL REMAIN AT THE VERY LOW LEVELS AND, WITH HIGH PROBABILITY, TILL 1.12 THE VISIBLE DISK OF THE SUN WILL BE SPOTLESS. MOST LIKELY WEEKLY AVERAGE VALUE OF THE RELATIVE SUNSPOT NUMBER IN THE INTERNATIO- NAL SYSTEM (old) FOR THE NEXT WEEK IS W = 010+10/-10. THE FLARE ACTIVITY WAS AT THE VERY LOW LEVEL. ONE EJECTION OF SOLAR FILAMENT WAS OBSERVED. ACCORDING TO DATA FROM SOHO AND STE- REO CORONOGRAPHS NINE CME HAVE BEEN OBSERVED. ---------------------------------------------------------------------- FLARES 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 25.11 0445 N23T12L108 ~10 B1.6 CME/0712 --------------------------------------------------------------------- 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 Space Obser. CH + N25L202 N21L214 S02L212 N18L185 28100 20.11 6 G1 SDO, SOHO... CH + N20L111 N00L114 S02L111 N15L089 27.11 1 SDO, SOHO... 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 7.11/03 UT THE EARTH IS IN "+" SECTOR OF THE INTERPLANETARY MAGNE- TIC FIELD. NEXT SECTOR BOUNDARY +/- EARTH SHOULD BE PASSED 0N 27.11. NOVEMBER 20 21 22 23 24 25 26 NOVEMBER Wus 000 000 000 000 000 013 015 F10.7 074 073 073 072 074 074 076 èbcg á5.2 á5.2 A5.2 A5.0 A4.8 A5.4 A5.9 GOES Sp 000 000 000 000 000 020 060 msh N 1 IMF + + + + +/~ + + DSCOVR Å>2 6.5E+7 4.7E+6 9.0E+7 1.6å+8 7.8å+7 1.3å+7 1.7E+7 GOES Ie>2 3310 300 2742 4658 2976 703 428 pfu Ap 8 29 11 10 8 8 3 nô Dst -42 -27 -15 -21 -22 nô KIOTO Amsc 7 24 12 12 15 6 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 GOES15 in (electrons/cm2.s.sr) for events > 1000 pfu. THE GREATER THAN 2 MeV ELECTRON FLUX AT GEOSYNCHRONOUS ORBIT HAS BE- GIN 17.11/1150 UT AND 17-20.11 HAVE BEEN OBSERVED. NEXT INCREASE THE FLUX WAS BEGAN 22.11/1020 UT AND 22 - 24.11 HAVE BEEN OBSERVED. NEXT WEEK THE GREATER THAN 2 MeV ELECTRON FLUX AT GEOSYNCHRONOUS OR- BIT IS NOT EXPECTED. MINOR MAGNETIC STORM (G1, Ams= 36, dur.= 15 h.) ACCORDING OF CENTER IN BOULDER DATA REGISTERED ON 20 - 21.11, BUT BY DATA OF IZMIRAN ON 21.11 THIS GEOMAGNETIC DISTURBANCE WAS SUBSTORM (G1, dur. <9 h.) IN CONSEQUENCE OF THE PASSAGE EARTH OF HIGH-SPEED STREAM FROM EQUATORI- AL CORONAL HOLE. NEXT WEEK GEOMAGNETIC CONDITION IS EXPECTED 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