SIDC Weekly Bulletin
Review of past solar and geomagnetic activity.| Source | SIDC (RWC-Belgium) |
| Frequency | Weekly |
| Format | Plain text |
| Mail header | SIDC Weekly Bulletin |
| SIDC code | bul |
Archive
Latest issue
:Issued: 2024 Jun 12 0625 UTC :Product: documentation at http://www.sidc.be/products/bul #--------------------------------------------------------------------# # SIDC Weekly bulletin on Solar and Geomagnetic activity # #--------------------------------------------------------------------# WEEK 1223 from 2024 Jun 03 Solar Active Regions (ARs) and flares --------------- Solar flaring activity was at moderate levels for most of the week. There was a total of 16 numbered active regions observed on the visible solar disk during the week. NOAA AR 3697 (Catania region 28) was the most complex region (magnetic field configuration beta-gamma-delta) and dominated the flaring activity, producing 14 M-class flares. The largest of which was an M9.7 flare from NOAA AR 3697 with peak time 01:49 UTC on June 08. NOAA AR 3709 also produced 3 M-class flares, and NOAA AR 3695 and NOAA 3703 just an isolated M-class flare. The remaining regions on disk were simple and produced C-class flares or were quiet. Coronal mass ejections --------------------- One Halo Coronal Mass Ejections with a possible Earth directed component was observed during the week. The CME was first observed in the LASCO-C2 chronograph imagery at 01:48 UTC June 08. The CME was mostly directed west and related to an M9.7 flare with peak time 01:49 UTC June 08, from NOAA AR 3697. Coronal Holes --------------------- A north-south elongated equatorial positive polarity coronal hole crossed the central meridian late June 04. And an east-west elongated negative polarity coronal hole in the southern hemisphere started to cross the central meridian on June 08. Proton flux levels --------------------- The greater than 10 MeV GOES proton flux increased above the 10 pfu threshold on June 08 at 02:55 UTC, and reached maximum level of 1030 pfu June 08 at 08:00 UTC. The greater than 100 MeV proton flux, as measured by GOES-18, rose above the nominal levels and peaked at 8.3 pfu June 08 at 03:40 UTC. The proton flux remained above the 10 pfu threshold until late June 09. This proton event was associated with the M9.7 flare that peaked on June 08 at 01:49 UTC (NOAA AR 3709). Electron fluxes at GEO --------------------- The greater than 2 MeV electron flux remained below the 1000 pfu threshold. The 24h electron fluence was at nominal levels. Solar wind --------------------- At the start of the week the solar wind conditions were enhanced under the influence of a ICME arrival with the Bz reaching a minimum of -10 nT. After retuning to slow solar wind conditions, they became enhanced again on June 06 possibly due to the arrival of an ICME, with the Bz reaching a minimum of - 15nT, then returned to slow solar wind conditions again by the end of the week. Solar wind ranged between 252.1 - 549.7km/s over the week. Geomagnetism --------------------- Geomagnetic conditions were mostly at quiet to unsettled levels, with minor storm level (NOAA Kp 5, Local K Bel 4) on June 03 between 21:00-24:00 UTC and moderate storm level (NOAA Kp 6, Local K Bel 6) on June 07 between 12:00 -18:00 UTC, and active level on June 08 between 00:00-03:00 UTC. --------------------------------------------------------------------------- DAILY INDICES DATE RC EISN 10CM Ak BKG M X 2024 Jun 03 258 216 186 013 C1.8 4 0 2024 Jun 04 /// 216 192 008 C2.0 2 0 2024 Jun 05 /// 180 195 008 C2.2 2 0 2024 Jun 06 182 161 191 007 C2.6 1 0 2024 Jun 07 157 163 184 038 C2.9 2 0 2024 Jun 08 /// 170 190 017 C3.2 7 0 2024 Jun 09 /// 147 181 008 C1.9 3 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 03 0459 0517 0527 ////// M1.0 28/3697 03 1149 1155 1200 ////// M3.2 28/3697 03 1218 1227 1231 S18W01 M2.8 SF 28/3697 03 1358 1411 1423 N28W42 M4.8 2N 27/3695 III/2 04 0609 0631 0651 S20W09 M2.4 1N 28/3697 04 0857 0904 0908 S19W12 M1.6 SN 28/3697 05 0832 0856 0914 S21W25 M3.4 1F 28/3697 05 0952 1007 1017 S21W25 M2.6 1N 28/3697 06 1450 1506 1522 S20W41 M6.1 2B 28/3697 07 0852 0913 0930 S10E84 M4.0 SF ///3709 III/1 07 1611 1622 1642 S20W50 M1.2 SF 28/3697 08 0018 0028 0035 S13E47 M1.8 SF 46/3709 VI/1 08 0039 0051 0057 S18W53 M3.3 1F 28/3697 08 0123 0149 0219 S18W53 M9.7 1F 28/3697 VI/2II/3IV/2 08 0517 0528 0538 S21W61 M1.5 SF 28/3697 III/1 08 0834 0844 0854 ////// M1.2 28/3697 /2/3 89/2I/1 08 0854 0858 0902 ////// M1.2 28/3697 /1 08 2053 2102 2107 ////// M1.0 38/3703 II/3 09 0649 0701 0716 ////// M1.6 F 28/3697 09 0802 0819 0832 ////// M1.2 46/3709 09 1950 2017 2029 ////// M1.0 28/3697 #--------------------------------------------------------------------# # 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 # #--------------------------------------------------------------------#
Details
This report is sent once a week, typically on a monday.The weekly bulletin gives an overview of solar and geomagnetic activity of the past week and includes a noticeable solar events list.
Check the ISES code book for information on ISES codes.