:Issued: 2024 Jun 17 1610 UTC :Product: documentation at http://www.sidc.be/products/bul #--------------------------------------------------------------------# # SIDC Weekly bulletin on Solar and Geomagnetic activity # #--------------------------------------------------------------------# WEEK 1224 from 2024 Jun 10 Solar Active Regions (ARs) and flares --------------- Solar flaring activity was high on June 10, when an X1.5 flare from NOAA AR 3697 was recorded. For the rest of the week, the solar flaring activity was mostly at moderate levels, with few M-class flares and multiple C-class flares. There was a total of 15 numbered active regions observed on the visible solar disk over the week. The most complex ones were NOAA AR 3697 and NOAA AR 3712. NOAA AR 3697 (beta-gamma-delta) rotated beyond the west limb early during the week, but still exhibited flaring activity. NOAA AR 3712 evolved to beta-gamma-delta on June 15 and produced C- and M-class flares. Coronal mass ejections --------------------- Multiple Coronal Mass Ejections (CMEs) were recorded during the last week. Selected events are listed below. Two partial halo CMEs, associated with flaring activity from NOAA 3697 were observed in SOHO/LASCO-C2 around 11:00 UTC and around 18:36 UTC respectively on June 10. The source region was behind the west limb and no impact on Earth was recorded for both cases. A partial halo CME was observed in SOHO/LASCO-C2 around 23:36 UTC on June 10, associated with a prominence eruption in the south-west quadrant. No impact on Earth was recorded. An asymmetric halo CME was first detected around 22:43 on June 11 in SOHO/LASCO-C2. A Type II radio burst reported at 22:51 UTC on June 11, was most likely associated with this CME. No impact on Earth was recorded. A faint partial halo CME was first detected around 23:32 UTC on June 12 in SOHO/LASCO-C2. It was most probably associated with the M1.2 flare from NOAA AR 3711. The shock from the ICME arrival at Earth was recorded around 11:05 UTC on June 15. A Coronal Mass Ejection (CME) was observed in SOHO/LASCO-C2 data around 12:11 UTC on June 15. It was most likely associated with a filament eruption observed in SDO/AIA 304 data around 11:20 UTC on June 15, in the south-east quadrant. Coronal Holes --------------------- Three coronal holes have crossed the central meridian during the past week. The first was an east-west elongated, negative polarity coronal hole in the south hemisphere that fully crossed the central meridian on June 11. The second was a small, negative polarity coronal hole in the southern hemisphere that crossed the central meridian on June 10. The third was a positive polarity coronal hole that crossed the central meridian on June 13. Proton flux levels --------------------- The greater than 10 MeV GOES proton flux was above the 10 pfu threshold until June 09. It remained close to the threshold between 03:00 UTC on June 12 and 12:00 UTC on June 13, when it started to decrease again. It returned to background levels late on June 15. Electron fluxes at GEO --------------------- Over the past week, the greater than 2 MeV electron flux as measured by GOES 16 and GOES 18 remained below the 1000 pfu threshold. The 24-hour electron fluence was at nominal levels throughout the week. Solar wind --------------------- Two shocks were detected in the solar wind data during the last week. The first one, associated with the CME observed on June 08, was detected around 16:50 UTC on June 10. The interplanetary magnetic field jumped from 6 nT to 15 nT, the solar wind speed jumped from 345 km/s to 440 km/s and increased up to 480 km/s. The solar wind density at the shock increased from 4 ppcc to 15 ppcc. The second shock, associated with the CME recorded on June 12, was detected around 11:05 on June 15. The interplanetary magnetic field jumped from 6 nT to 14 nT, the solar wind speed jumped from 360 km/s to 437 km/s and increased up to 460 km/s. The solar wind density at the shock increased from 3.8 ppcc to 9.9 ppcc. Geomagnetism --------------------- Geomagnetic conditions reached globally and locally active levels (NOAA Kp from 0 to 4+ and K Bel from 0 to 4) in response to the ICME arrival on June 10. Geomagnetic conditions reached globally minor storm levels (NOAA Kp 5+) and locally active levels (K BEL 4) in response to the ICME arrival on June 15. --------------------------------------------------------------------------- DAILY INDICES DATE RC EISN 10CM Ak BKG M X 2024 Jun 10 140 122 178 011 C2.3 5 0 2024 Jun 11 113 100 165 013 C1.7 0 0 2024 Jun 12 /// 118 165 005 C1.4 1 0 2024 Jun 13 /// 149 170 004 C1.4 1 0 2024 Jun 14 169 157 169 006 C1.7 1 0 2024 Jun 15 /// 147 171 023 C1.9 1 0 2024 Jun 16 /// 151 167 018 C1.4 0 0 --------------------------------------------------------------------------- # RC : Sunspot index (Wolf Number) from Catania Observatory (Italy) # EISN : Estimated International Sunspot Number # 10cm : 10.7 cm radioflux (DRAO, Canada) # Ak : Ak Index Wingst (Germany) # BKG : Background GOES X-ray level (NOAA, USA) # M,X : Number of X-ray flares in M and X class, see below (NOAA, USA) --------------------------------------------------------------------------- NOTICEABLE EVENTS SUMMARY DAY BEGIN MAX END LOC XRAY OP 10CM Catania/NOAA RADIO_BURST_TYPES 10 0558 0609 0616 ////// M3.3 28/3697 10 1018 1058 1103 ////// M5.3 F 28/3697 II/2I/2 10 1320 1329 1335 ////// M1.3 F 28/3697 10 1811 1840 1918 ////// M9.5 28/3697 II/1I/1I/1 7 10 0938 1006 1018 ////// M2.2 28/3697 12 2224 2246 2335 ////// M1.2 N 49/3711 13 1634 1645 1655 S16E59 M3.2 1N ///3713 14 0414 0432 0443 ////// M2.4 51/3712 15 0600 0627 0643 ////// M1.3 51/3712 #--------------------------------------------------------------------# # Solar Influences Data analysis Center - RWC Belgium # # Royal Observatory of Belgium # # # # Website http://www.sidc.be. # # E-mail sidc-support@oma.be # # To unsubscribe http://www.sidc.be/registration/unsub.php # # # # Legal notices: # # - Intellectual Property Rights: # # http://www.astro.oma.be/common/internet/en/data-policy-en.pdf # # - Liability Disclaimer: # # http://www.astro.oma.be/common/internet/en/disclaimer-en.pdf # # - Use and processing of your personal information: # # http://www.astro.oma.be/common/internet/en/privacy-policy-en.pdf # #--------------------------------------------------------------------#