:Issued: 2026 Aug 14 1230 UTC :Product: documentation at http://www.sidc.be/products/tot #--------------------------------------------------------------------# # DAILY BULLETIN ON SOLAR AND GEOMAGNETIC ACTIVITY from the SIDC # #--------------------------------------------------------------------# SIDC URSIGRAM 60814 SIDC SOLAR BULLETIN 14 Aug 2026, 1230UT SIDC FORECAST SOLAR FLARES : C-class flares expected, (probability >=50%) GEOMAGNETISM : Active conditions expected (A>=20 or K=4) SOLAR PROTONS : Quiet PREDICTIONS FOR 14 Aug 2026 10CM FLUX: 107 / AP: 008 PREDICTIONS FOR 15 Aug 2026 10CM FLUX: 109 / AP: 015 PREDICTIONS FOR 16 Aug 2026 10CM FLUX: 111 / AP: 010 Solar Active Regions and flaring: Solar flaring activity was low over the past 24 hours, with three C-class flares identified. SIDC Sunspot Group (SG) 936 (NOAA Active Region [AR] 4503, Beta magnetic configuration) had a sudden flux emerge shortly before the release of SIDC flare 8350 on 14 Aug at 07:01 UTC. With a C4 brightness this is the larger flare since 2 Aug. SIDC SG 941 (NOAA AR 4508, Alpha magnetic configuration) produced the second C-class flare and SIDC SG 939 (NOAA AR 4506, Beta magnetic configuration) the third. Isolated C-class flaring activity is expected in the next 24 hours. Coronal mass ejections: No Earth-directed Coronal Mass Ejections (CME) were observed in the last 24 hours. Solar wind: The Solar Wind (SW) conditions of the past 24 hours featured a slow SW regime. The SW speed dropped from 400 to 330 km/s, the interplanetary magnetic field (B) ranged between 3 and 8 nT, and its North- South component (Bz) varied from -6 to 6 nT. A High Speed Stream (HSS) that is associated with the SIDC Coronal Hole (CH) 174, is expected to arrive in the next 24 hours. Geomagnetism: The geomagnetic conditions of the past 24 hours were from quiet to unsettled both globally and locally (NOAA Kp and K BEL 1 to 3). As a HSS is likely to arrive in the next 24 hours, up to active conditions will probably register. Proton flux levels: The greater than 10 MeV proton flux, as measured by the GOES-19 satellite, was at nominal levels over the past 24 hours and is likely to remain so in the next 24 hours. Electron fluxes at GEO: The greater than 2 MeV electron flux, as measured by GOES 19, was below the 1000 pfu alert threshold for past 24 hours. It is expected to remain at the same levels in the next 24 hours. The electron fluence was at normal levels in the past 24 hours and it is expected to remain at the same levels in the next 24 hours. TODAY'S ESTIMATED ISN : 106, BASED ON 20 STATIONS. 99999 SOLAR INDICES FOR 13 Aug 2026 WOLF NUMBER CATANIA : /// 10CM SOLAR FLUX : 108 AK CHAMBON LA FORET : 014 AK WINGST : 011 ESTIMATED AP : 010 ESTIMATED ISN : 091, BASED ON 28 STATIONS. NOTICEABLE EVENTS SUMMARY DAY BEGIN MAX END LOC XRAY OP 10CM Catania/NOAA RADIO_BURST_TYPES NONE END UMAGF 30503 60814 1004/ 13069 1/014 21211 32332 UMAGF 31523 60814 0000/ 13000 1/011 23322 32124 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 # #--------------------------------------------------------------------#