####018001052#### AXXX82 KWNP 090031 DAYOBS :Product: Summary of Space Weather Observations dayobs.txt :Issued: 2026 Jun 09 0030 UTC # Prepared by the US Dept. of Commerce, NOAA, Space Weather Prediction Center # Product description and SWPC contact on the Web # https://www.swpc.noaa.gov/content/subscription-services # # Summary of Space Weather Observations # :Solar_Region_Summary: 2026 Jun 08 # Region Location Sunspot Characteristics # Helio Spot Spot Mag. # Num Lat.,CMD Long. Area Extent class count class 4455 N15W90 92 110 3 HSX 1 A 4456 N17W61 63 80 8 DAI 10 B 4458 S05W76 78 100 6 DAO 2 B 4459 N14W29 31 30 4 HSX 2 A 4462 N15W07 9 60 9 DSI 10 B 4463 N17E24 338 40 2 HSX 1 A 4464 S12E24 338 80 6 DAC 9 BG 4465 N11E70 292 70 6 DAO 4 B ####018002295#### FXXX10 KWNP 090031 DAYTDF :Product: 3-Day Forecast :Issued: 2026 Jun 09 0030 UTC # Prepared by the US Dept. of Commerce, NOAA, Space Weather Prediction Center # Product description and SWPC contact on the Web # http://www.swpc.noaa.gov/wwire.html # # 3-Day Forecast # A. NOAA Geomagnetic Activity Observation and Forecast The greatest observed 3 hr Kp over the past 24 hours was 3 (below NOAA Scale levels). The greatest expected 3 hr Kp for Jun 09-Jun 11 2026 is 4.33 (below NOAA Scale levels). NOAA Kp index breakdown Jun 09-Jun 11 2026 Jun 09 Jun 10 Jun 11 00-03UT 4.33 3.00 2.00 03-06UT 4.00 3.33 2.00 06-09UT 3.00 2.33 3.00 09-12UT 3.33 2.00 2.67 12-15UT 2.33 2.00 3.00 15-18UT 1.67 2.00 3.33 18-21UT 3.00 2.33 3.00 21-00UT 2.67 2.33 4.00 Rationale: No G1 (Minor) or greater geomagnetic storms are expected. No significant transient or recurrent solar wind features are forecast. B. NOAA Solar Radiation Activity Observation and Forecast Solar radiation, as observed by NOAA GOES-18 over the past 24 hours, was below S-scale storm level thresholds. Solar Radiation Storm Forecast for Jun 09-Jun 11 2026 Jun 09 Jun 10 Jun 11 S1 or greater 10% 10% 10% Rationale: No S1 (Minor) or greater solar radiation storms are expected. No significant active region activity favorable for radiation storm production is forecast. C. NOAA Radio Blackout Activity and Forecast No radio blackouts were observed over the past 24 hours. Radio Blackout Forecast for Jun 09-Jun 11 2026 Jun 09 Jun 10 Jun 11 R1-R2 55% 55% 55% R3 or greater 10% 10% 10% Rationale: Isolated R1/R2 (Minor/Moderate) radio blackouts are likely, with a slight chance for isolated R3 (Strong) events through 11 June, primarily due to the flare potential exhibited by Regions 4456 (N17W61, Dai/beta), 4462 (N15W07, Dsi/beta), 4464 and 4465. ####018002995#### FXXX12 KWNP 090031 DAYDIS :Product: Forecast Discussion :Issued: 2026 Jun 09 0030 UTC # Prepared by the US Dept. of Commerce, NOAA, Space Weather Prediction Center # Product description and SWPC contact on the Web # http://www.swpc.noaa.gov/wwire.html # # Forecast Discussion # Solar Activity .24 hr Summary... Solar activity remained at low levels with the two largest flares of the day originating from Region 4465 (N11E70, Dao/beta): a C7.2 at 08/0249 UTC and a C4.5/Sf at 08/0510 UTC. There are eight active regions on disk, most of them remained stable or showed some decay in area. Region 4464 (S12E24, Dac/beta-gamma) became more complex magnetically, gained additional intermediary spots during the period, and was the source of a C1.2 at 08/1733 UTC. No new Earth-directed CMEs were observed in available coronagraph imagery. .Forecast... Isolated M-class flares are likely, with a slight chance for X-class flares, through 11 June primarily due to the flare potential exhibited by Regions 4456 (N17W61, Dai/beta), 4462 (N15W07, Dsi/beta), 4464 and 4465. Energetic Particle .24 hr Summary... The greater than 2 MeV electron flux at geosynchronous orbit reached high levels with a peak flux of 1,310 pfu at 08/1340 UTC. The greater than 10 MeV proton flux remained at background levels during the period. .Forecast... The greater than 2 MeV electron flux levels at geosynchronous orbit are likely to continue reaching high levels through 10 June, returning to moderate-low levels on 11 June. The greater than 10 MeV proton flux is expected to remain at background levels through 11 June. Solar Wind .24 hr Summary... Solar wind parameters suggested a glancing blow from the 06 June CME that was anticipated to arrive during the period. Solar wind speeds decreased from about 600 km/s to below 450 km/s, while the total Interplanetary Magnetic Field (IMF) strength showed a slight oscillation around 5nT. All the 3 components of the IMF vector became negative between 08/0300 UTC and 08/1400 UTC, with Bz reaching as south as -4 nT around 08/0919 UTC. The Phi angle remained mostly in the positive sector during the day. .Forecast... Analysis of the solar wind parameters, along with the suprathermal ions and electrons data from instruments at L1, suggested that the 06 June CME glancing passage near Earth already occurred on 08 June, reducing our confidence in further impacts on the next days. Therefore, background solar wind is expected until 11 June, when a -CH HSS is anticipated to become geoeffective. Geospace .24 hr Summary... Geomagnetic field activity was at quiet to unsettled levels during the past 24h. .Forecast... The geomagnetic field is expected to be at quiet to active levels on 09 June, quiet to unsettled levels on 10 Jun, and active levels on 11 June (due to anticipated -CH HSS effects).