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: 2023 Nov 28 1916 UTC :Product: documentation at http://www.sidc.be/products/bul #--------------------------------------------------------------------# # SIDC Weekly bulletin on Solar and Geomagnetic activity # #--------------------------------------------------------------------# WEEK 1195 from 2023 Nov 20 Solar Active Regions (ARs) and flares --------------- There were 14 active regions visible throughout the week (NOAA ARs 3489 to 3503). The majority of them had a simple alpha or beta magnetic field configuration at the start of the week, while more complex regions, such as NOAA AR 3500 (beta-gamma-delta) were visible at the second half of the week. Four M-class flares were measured. The strongest flare was an M1.5 from NOAA AR 3489, peaking at 03:38 UTC on 23 November. Coronal mass ejections --------------------- Numerous CMEs per day occurred. Three of them had a slight chance of a glancing blow to Earth. A shock was observed in the solar wind parameters at 07:55 UTC on November 25, possibly from the CME seen in LASCO C2 at 06:48UT on November 22. Coronal Holes --------------------- Four coronal holes were on-disk during the week, with two of them crossing central meridian on November 21 and 23, one with negative polarity at mid southern latitudes and an a mid northern latitudinal one with positive polarity. Proton flux levels --------------------- The 10 MeV GOES proton flux was below threshold the full week. Electron fluxes at GEO --------------------- The greater than 2 MeV electron flux was below the 1000 pfu threshold, as measured by GOES 16 from the majority o the week, with exception November 24, when it crossed the 1000 pfu threshold. The 24 hour electron fluence was at normal levels. Solar wind --------------------- At the start of the the week transient features and influences from the high latitudes northern polarity coronal holes appeared to be influencing the solar wind parameters. On November 22, the high speed stream from the eastern mid latitudinal positive polarity coronal hole was apparent, with values returning towards background levels by November 24. The week ended with the possible arrival of the ICME at 07:55 UTC on November 25 possibly from the CME seen in LASCO C2 at 06:48UT on November 22, combined with the high speed stream from the mid latitudinal positive polarity coronal hole that crossed central meridian on November 23. Geomagnetism --------------------- Geomagnetic conditions reached moderate storm levels globally and locally (Kp 6 and K_Bel 6) late November 25. This was due to the the combined effects of the ICME with the high speed stream. --------------------------------------------------------------------------- DAILY INDICES DATE RC EISN 10CM Ak BKG M X 2023 Nov 20 119 103 157 004 C1.5 1 0 2023 Nov 21 193 166 172 018 C1.7 0 0 2023 Nov 22 /// 169 190 034 C2.7 0 0 2023 Nov 23 /// 186 194 006 C2.3 2 0 2023 Nov 24 205 180 178 010 C1.2 1 0 2023 Nov 25 /// 180 176 042 C1.1 0 0 2023 Nov 26 /// 188 180 010 C1.0 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 20 0854 0903 0912 ////// M1.2 ///3492 23 0259 0338 0405 ////// M1.4 /////// III/1VI/2 23 1425 1437 1442 ////// M1.0 54/3490 III/2 24 0917 0933 0943 S16W02 M1.1 1F 53/3499 VI/2III/2 #--------------------------------------------------------------------# # 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.