------------------------------------------------------------------- THE RELATIVE MONTHLY MEAN SUNSPOT NUMBER ON MAY 2018 HAS MADE Wmay. = 8.0 13.2(n) THAT GIVES FOR 106 MONTHS (2017, NOVEMBER) OF DEVELOPMENT CURRENT 24 SOLAR CYCLE THE SMOOTHED MONTHLY MEAN SUNSPOT NUMBER W*nov. = 9.2 15.4 - in new system W*oct. = 10.0 16.7 - in new system On July 1, 2015 Centre in Brussels moved to a new system of calcu- lation the relative number of sunspots and practically all of the values were replaced throughout the numbered series of Wolf numbers (see link). While there is addictive, I recalculated (0.6) to the old system, but only W*, and present below the new values for the minimum and maximum of 24 cycles SA. THE BEGINNING OF 24 SOLAR CYCLE - I 2009 with W*=1.8; (2.2) THE TIME OF THE CURRENT CYCLE MAXIMUM - IV 2014, - Wmax = 82;(116.4) THE END OF 24 SOLAR CYCLE (THE POINT OF MINIMUM) - IV - X 2020; THE INTERNATIONAL DAILY VALUE OF RELATIVE SUNSPOT NUMBER FOR 2018, MAY ACCORDING DATA OF 70 SOLAR OBSERVATORIES HAS MADE: 1.. 0m 6.. 15 11.. 11 16.. 0m 21.. 11 26.. 27 31.. 22 2.. 0m 7.. 14 12.. 13 17.. 0m 22.. 13 27.. 36M 3.. 0m 8.. 20 13.. 12 18.. 0m 23.. 28 28.. 19 4.. 13 9.. 23 14.. 0m 19.. 0m 24.. 35 29.. 23 5.. 14 10.. 11 15.. 0m 20.. 0m 25.. 30 30.. 20 THE MONTHLY MEAN OF OBSERVED RADIO FLUX OF THE 10 cm (2800 MHz ON MAY 2018, AND SMOOTHES ON 2017, NOVEMBER F10.7may. = XX.0 F*10.7nov.= XX.1 THE MONTHLY MEAN OF GEOMAGNETIC Ap-index ON MAY 2018 AND SMOOTHES ON 2017, NOVEMBER Ap may. = X.7 Ap*nov. = X.8 ------------------------------------------------------------------- Weekly Bulletin on Solar and Geomagnetic Activity Highlights on 28.05 - 01.06.2018, Forecast on 02 - 11.06.2018, Carrington Rotation 2004 (16,45.05.2018) Earth out of ecliptic (-0.8 - -0.6) deg. (S25 - N25 is zone of geoeffectiveness) THE SUNSPOT-FORMING ACTIVITY OF THE SUN WAS ON LOW AND VERY LOW LEVELS. THE ESTIMATED, MOST LIKELY WEEKLY AVERAGE VALUE OF THE RELATIVE SUNSPOT NUMBER IN THE INTERNATIONAL SYSTEM (old) FOR THE PERIOD W = 013+001/-001 (Wn= 020+002/-001). ON THE VISIBLE DISC OF THE SUN, 1 SMALL SUNSPOT GROUPS WITH SIG- NIFICANT FLARE ACTIVITY IN THE RANGE OF WEAK FLARES (CLASS B) WITH TWO FLARE PERIODS, THROUGH THE SINGLE FLARE OF THE CLASS "C" HAVE BEEN OBSERVED 28.05. NEXT WEEK THE LEVEL OF SUNSPOT ACTIVITY WILL BE ON THE LOW (28.05) AND VERY LOW LEVELS. LIKELY WEEKLY AVERAGE VALUE OF THE RELATIVE SUNSPOT NUMBER IN THE INTERNATIONAL SYSTEM (old) FOR THE NEXT WEEK IS W=015+10/-10. THE FLARE ACTIVITY WAS ON THE LOW LEVEL 28.05 AND VERY LOW IN OTHER DAYS. NO SOLAR FILAMENT EJECTIONS AND FOUR CORONAL MASS EJECTIONS HAVE BEEN OBSERVED. ---------------------------------------------------------------------- FLARES FROM M1 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 LEVELS. 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 - N05L195 S13L238 S20L208 S16L180 33700 31-1.06 2 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 30.05/1800 UT EARTH IS IN "-" SECTOR OF INTERPLANETARY MAG- NETIC FIELD. NEXT SECTOR BOUNDARY -/+ THE EARTH MUST PASS 21.06. íáê 28 29 30 31 01 éàîø Wus 020 022 018 021 032 F10.7 077 075 075 077 076 èbcg á4.8 á4.1 á3.7 á6.0 á5.3 GOES Sp 080 070 030 050 080 msh N IMF + + +/- - + DSCOVR Å>2 9.6E+6 4.4E+6 4.8E+6 8.2å+6 8.2å+6 GOES Ie>2 301 247 135 579 197 pfu Ap 4 4 4 15 3 nô Dst nô KIOTO Amsc 4 6 4 15 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 GOES15 in (electrons/cm2.s.sr) for events > 1000 pfu. THE GREATER THAN 2 MeV ELECTRON FLUX AT GEOSYNCHRONOUS ORBIT BEGIN- NING AT 01/1610 UT. NEXT WEEK THE GREATER THAN 2 MeV ELECTRON FLUX AT GEOSYNCHRONOUS ORBIT IS EXPECTED 1 - 9.06. MINOR MAGNETIC STORM (G1, Ams= 31, dur.= 15 h.) ACCORDING DATA OF BOULDER CENTER AND (G0, Ams= 27, dur.=15 h.) ACCORDING IZMIRAN DA- TA WAS REGISTERED 1-2 JUNE, AS RESULT PASSING OF HIGHSPEED STREAM FROM TRANS-EQUATORIAL CORONAL HOLE. IN OTHER DAYS THE GEOMAGNETIC CONDITION WAS QUITE AND UNSETTLED. THE NEXT WEEK THE GEOMAGNETIC CONDITION IS EXPECTED TO BE PRIMA- RILY QUITE AND UNSETTLED. 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