:Issued: 2023 Jun 03 1231 UTC :Product: documentation at http://www.sidc.be/products/meu #--------------------------------------------------------------------# # DAILY BULLETIN ON SOLAR AND GEOMAGNETIC ACTIVITY from the SIDC # # (RWC Belgium) # #--------------------------------------------------------------------# SIDC URSIGRAM 30603 SIDC SOLAR BULLETIN 03 Jun 2023, 1230UT SIDC FORECAST SOLAR FLARES : M-class flares expected (probability >=50%) GEOMAGNETISM : Quiet (A<20 and K<4) SOLAR PROTONS : Quiet PREDICTIONS FOR 03 Jun 2023 10CM FLUX: 162 / AP: 007 PREDICTIONS FOR 04 Jun 2023 10CM FLUX: 160 / AP: 007 PREDICTIONS FOR 05 Jun 2023 10CM FLUX: 160 / AP: 007 Solar Active Regions and flaring: There are ten visible active regions on the solar disk. Only C-class flaring has been observed in the last 24 hours, from NOAA ARs 3315, 3319, 3323, 3324, and 3326. The strongest flare was a C6.3 from NOAA AR 3324, peaking at 22:42 UTC on 2 June. More C-class flares will be observed and M-class flares are possible. Coronal mass ejections: No Earth-directed coronal mass ejections (CMEs) were detected in the past 24 hours. Coronal holes: There are two positive polarity coronal holes, a small one close to the equator and another larger one in the south. The corresponding high speed streams seem to have missed the Earth. Solar wind: In the last 24 hours the solar wind speed has decreased to 340 km/s and the interplanetary magnetic field to 3 nT, its polarity has turned positive (away from the Sun). Similar conditions can be expected for the next 24 hours. There are slight chances of still seeing fast solar winds from the two coronal holes, but their effect is not expected to be important. Geomagnetism: The geomagnetic conditions over the past 24 hours have been quiet to moderate (K_Belgium and Kp up to 4). Similar conditions can be expected for the next 24 hours. Proton flux levels: Over the past 24 hours the greater than 10 MeV GOES proton flux was at nominal levels and is expected to remain so in the next 24 hours. Electron fluxes at GEO: The greater than 2 MeV electron flux was below the 1000 pfu threshold over the past 24 hours and is expected to remain so in the next 24 hours. The 24h electron fluence was at normal levels and is expected to remain at normal levels over the next 24 hours. TODAY'S ESTIMATED ISN : 135, BASED ON 18 STATIONS. SOLAR INDICES FOR 02 Jun 2023 WOLF NUMBER CATANIA : /// 10CM SOLAR FLUX : 162 AK CHAMBON LA FORET : 008 AK WINGST : 006 ESTIMATED AP : 006 ESTIMATED ISN : 136, BASED ON 28 STATIONS. NOTICEABLE EVENTS SUMMARY DAY BEGIN MAX END LOC XRAY OP 10CM Catania/NOAA RADIO_BURST_TYPES NONE END BT #--------------------------------------------------------------------# # 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 # #--------------------------------------------------------------------#