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 |
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:Issued: 2024 May 27 1324 UTC :Product: documentation at http://www.sidc.be/products/bul #--------------------------------------------------------------------# # SIDC Weekly bulletin on Solar and Geomagnetic activity # #--------------------------------------------------------------------# WEEK 1221 from 2024 May 20 Solar Active Regions (ARs) and flares --------------- During the week, 20 ARs were visible: NOAA AR 3672 to 3692. There were 16 M-class flares, produced by NOAA ARs 3685 (beta-gamma magnetic field configuration) on 19 May, 3679 (beta-gamma-delta) on May 21-24, 3683 (beta) on 22 May and 3689 (beta) on May 23. Coronal mass ejections --------------------- There was one CME with a possible Earth directed component, originating from a large filament eruption in the SE quadrant on 23 May. The CME was first seen by LASCO C2 at 01:12 UT on 23 May, followed by other minor eruptions in the vicinity. The CME angular width was about 80 degrees and the speed about 350 km/s. Coronal Holes --------------------- There were two high latitude coronal holes visible, one in the southern and one in the northern hemisphere. The one in the north (negative polarity) had a low latitudinal extension. Proton flux levels --------------------- The 10 MeV GOES-18 proton flux was below threshold throughout the week. Electron fluxes at GEO --------------------- The greater than 2 MeV electron flux from GOES 16 was below the threshold level during the week. The electron fluence was at normal levels throughout the week. Solar wind --------------------- Solar wind was slow during the whole week, with speeds remaining below 500 km/s and interplanetary magnetic field belo 10 nT (mostly with positive polarity). Geomagnetism --------------------- Geomagnetic conditions were quiet most of the week, except for a short 3-hour period of Kp reaching 4 on 23 May. --------------------------------------------------------------------------- DAILY INDICES DATE RC EISN 10CM Ak BKG M X 2024 May 20 179 143 200 008 C1.4 0 0 2024 May 21 177 163 191 010 C1.5 1 0 2024 May 22 188 152 196 005 C2.0 3 0 2024 May 23 154 134 176 012 C2.5 5 0 2024 May 24 135 127 163 012 C1.5 3 0 2024 May 25 /// 103 152 009 C1.2 0 0 2024 May 26 /// 121 156 014 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 21 1919 1931 1939 S05W48 M1.9 1N 06/3679 VI/1 22 0302 0313 0323 S06W52 M1.5 SN 06/3679 22 0338 0404 0422 ////// M2.3 08/3683 CTM/1VI/1 22 1351 1405 1412 S06W55 M1.2 SF 06/3679 23 0205 0216 0226 ////// M4.2 06/3679 23 0403 0429 0454 S09W18 M1.7 SF 06/3679 VI/2 23 1003 1008 1014 ////// M1.0 /////// 23 1248 1320 1344 S09W65 M2.5 SF 06/3679 VI/2 23 1553 1558 1603 ////// M1.0 17/3689 24 0628 0706 0721 S07W81 M1.4 SF 06/3679 III/2 24 0751 0801 0808 S09W81 M1.0 SF 06/3679 24 2005 2025 2036 ////// M1.4 06/3679 #--------------------------------------------------------------------# # 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.