Weekly Bulletin on Solar and Geomagnetic Activity Highlights on 11 - 17.09.2017, Forecast on 18 - 26.09.2017, Carrington Rotation 2194, 2195 (16,48.08; 12,73.09.2017) Earth above the ecliptic (7.23 - 7,14) deg. (S23 - N37 is geoeffectiveness zone) SUNSPOT-FORMING ACTIVITY WAS ON THE LOW LEVEL AT 12.09 AND VERY LOW IN OTHER DAYS. THE ESTIMATED, MOST LIKELY WEEKLY AVERAGE VALUE OF THE RELATIVE SUNSPOT NUMBER IN THE INTERNATIONAL SYSTEM (old) FOR THE PERIOD W=008+06/-01 (Wn =013+09/-02). ON THE VISIBLE SOLAR DISK 2 - 1 SMALL AND QUINE SUNSPOT GROUP. NEXT WEEK THE LEVEL OF SUNSPOT-FORMING ACTIVITY WILL EXPECTED AT A THE VERY LOW LEVEL. MOST LIKELY WEEKLY AVERAGE VALUE OF THE RELA- TIVE SUNSPOT NUMBER IN THE INTERNATIONAL SYSTEM (old) FOR THE NEXT WEEK IS W = 010+10/-10. FLARE ACTIVITY WAS AT THE LOW LEVEL AT 11.09 AND THE VERY LOW IN OTHER DAYS. THERE WERE THREE SOLAR FILAMENT EJECTIONS OCCURRENCES THROUGH THE PERIOD. ACCORDING TO THE DATA FROM SOHO AND STEREO CO- RONOGRAPHS > 22 CME, TWO WERE THE TYPE III (angular with is 180 - 270 deg.) AND TWO-THE TYPE II (angular with is 90-180 deg.) 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 ËÏÏÒÄÉÎÁÔÙ l × ÇÒÁÄ. Fl Aï CME/to 12.09 1352 1358 N19W45L046 2 12677 13.09 0757 1201 S18W47L021 18 16.09 0906 1056 N15E00L307 8 CME/1200 --------------------------------------------------------------------- NEXT WEEK THE FLARE ACTIVITY IS EXPECTED ON THE 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 + N45L031 N40L346 N10L041 N23L054 13.08 4 G1 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. ------------------------------------------------------------------------ 15.09/03 UT THE EARTH IS IN "+" SECTOR OF THE INTERPLANETARY MAGNE- TIC FIELD. NEXT SECTOR BOUNDARY -/+ EARTH SHOULD BE PASSED 0N 5.10. --------------------------------------------------------------------- SEPTEMBER 11 12 13 14 15 16 17 SEPTEMBER Wus 023 011 011 011 013 013 013 F10.7 080 076 075 074 073 072 072 èbcg A1.6 <á1.0 A1.4 2 1.7å+8 2.0å+8 1.3E+7 1.8å+7 5.4å+8 4.8å+8 9.2å+8 GOES Ie>2 15826 3776 2410 957 32096 22886 46263 pfu Ap 12 18 15 28 39 36 17 nô Dst nô KIOTO Amsc 12 20 17 24 32 21 18 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 01.09/1350 UT AND 01 - 13.09 WAS OBSERVED. THE SECOND ENHANSMENT BEGAN 15.09/0830 UT AND WAS OBSERVED 15-17.09. THE MINOR MAGNETIC STORM (G1, Ams=31, ÄÌÉÔ.= 15 Þ.) ACCORDING TO THE CENTRE IN BOULDER DATA WAS REGISTERED 12 - 13.09, HOWEVER IN IZMIRAN AT THIS TIME NOTED THE INTENSIVE (G2) SUBSTORM 9 h. DURATION. THE MO- DERATE MAGNETIC STORM (G2, Ams= 46, dur.=42 h.) ACCORDING TO THE CEN- TER IN BOULDER DATA AND THE MINOR MAGNETIC STORM (G2, Ams=36, dur.= 42 h.) ACCORDING TO THE IZMIRAN DATA 14 - 16.09 IS REGISTERED. IN THE SECOND HALF OF 16.09 THE NEXT MINOR MAGNETIC STORM (G2, Ams=36, dur.= 42 h.) ACCORDING TO THE CENTRE IN BOULDER DATA HAS BEGAN, HOWEVER IN IZMIRAN NOTED OF 2 SHORT DURATION SUBSTORMS (G0) AT 16.09 AND (G1) - 17.09. IN OTHER DAYS THE GEOMAGNETIC CONDITION HAS BEEN ACTIVE. NEXT WEEK THE GEOMAGNETIC CONDITION WILL BE 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