| Warnings and Alerts | |
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Issue Time: 2025 Nov 24 1159 UTC
ALERT: Geomagnetic K-index of 4 Threshold Reached: 2025 Nov 24 1159 UTC Synoptic Period: 0900-1200 UTC Active Warning: Yes Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude. Induced Currents - Weak power grid fluctuations can occur. Aurora - Aurora may be visible at high latitudes such as Canada and Alaska. Space Weather Scales |
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| Current Condition and Alerts | |
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Issued: 2025 Nov 24 1205 UTC
Prepared
by the US Dept. of Commerce, NOAA, Space Weather Prediction
Center
Geophysical Alert Message Solar-terrestrial indices for 23 November follow. Solar flux 120 and estimated planetary A-index 13. The estimated planetary K-index at 1200 UTC on 24 November was 3.67. No space weather storms were observed for the past 24 hours. Space weather for the next 24 hours is predicted to be minor. Geomagnetic storms reaching the G1 level are likely. Space Weather Scales |
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| Forecast Discussion | |
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Issued: 2025 Nov 24 1230 UTC
Prepared
by the U.S. Dept. of Commerce, NOAA, Space Weather Prediction
Center
Solar Activity .24 hr Summary... Solar activity was at low. A double-peak C2.5 flare at 24/0625 UTC was the strongest of the period with contributions from both adjacent Regions 4290 (S11E35, Cso/beta) and 4291 (S16E44, Eai/beta-gamma). Newly numbered Region 4293 (N06E50, Bxo/beta) was relatively simple and quiet. Some minor development was observed around Region 4288 (N17W29, Csp/beta) and Region 4292 (S16E15, Cro/beta). No Earth-directed CMEs were observed in available coronagraph imagery. .Forecast... Solar activity is expected to remain at low levels on 24-26 Nov, with a slight chance for moderate levels (R1-R2/Minor-Moderate) mainly due to the flare potential of Region 4291. Energetic Particle .24 hr Summary... The greater than 2 MeV electron flux was at moderate levels. The greater than 10 MeV proton flux was at background levels. .Forecast... The greater than 2 MeV electron flux is expected to remain at moderate levels over 24-26 Nov. The greater than 10 MeV proton flux in expected to remain at background levels through 26 Nov. Solar Wind .24 hr Summary... Solar wind parameters were mildly enhanced, possibly due to a transient feature. Total magnetic field strength averaged near 10 nT and peaked at 15 nT. The Bz component reached as far south as -11 nT at 24/1106 UTC. Solar wind speeds increased over the period, starting at ~400 km/s, with a peak of ~700 km/s observed at 24/1109 UTC. Phi angle was variable. .Forecast... Enhanced conditions are likely to continue over 24 Nov. On 25 Nov, the influence from positive polarity coronal hole is likely to drive observed enhancements the solar wind parameters. These elevated conditions are expected to persist through 26 Nov. Geospace .24 hr Summary... The geomagnetic field reached active levels. .Forecast... The geomagnetic field is expected to continue at unsettled to active levels, with G1 (Minor) geomagnetic storms possible, on 24 Nov. On 25 Nov and through 26 Nov field activity is likely to reach G1 (Minor) geomagnetic storm conditions due primarily to the influence of a positive polarity coronal hole. Space Weather Scales |
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| Three Day Forecast | |
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Issued: 2025 Nov 24 1230 UTC
Prepared
by the U.S. Dept. of Commerce, NOAA, Space Weather Prediction
Center
A. NOAA Geomagnetic Activity Observation and Forecast The greatest observed 3 hr Kp over the past 24 hours was 4 (below NOAA Scale levels). The greatest expected 3 hr Kp for Nov 24-Nov 26 2025 is 5.00 (NOAA Scale G1). NOAA Kp index breakdown Nov 24-Nov 26 2025 Nov 24 Nov 25 Nov 26 00-03UT 3.33 3.00 3.67 03-06UT 3.00 2.00 5.00 (G1) 06-09UT 3.33 2.00 3.67 09-12UT 3.67 2.67 2.67 12-15UT 3.00 3.67 4.67 (G1) 15-18UT 2.00 5.00 (G1) 3.67 18-21UT 2.33 3.67 3.00 21-00UT 3.67 4.00 3.67 Rationale: G1 (Minor) or greater geomagnetic storms are likely over 25-26 Nov due to anticipated influence from a positive polarity coronal hole. 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 Nov 24-Nov 26 2025 Nov 24 Nov 25 Nov 26 S1 or greater 1% 1% 1% 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 Nov 24-Nov 26 2025 Nov 24 Nov 25 Nov 26 R1-R2 15% 15% 15% R3 or greater 1% 1% 1% Rationale: There exists a slight chance for R1-R2 (Minor-Moderate) radio blackouts over 24-26 Nov, due primarily to the flare potential of Region 4291. Space Weather Scales |
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| Weekly Highlights and Forecasts | |
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Issued: 2025 Nov 24 0142 UTC
Prepared
by the US Dept. of Commerce, NOAA, Space Weather Prediction
Center
Highlights of Solar and Geomagnetic Activity 17 - 23 November 2025 Solar activity was at low levels. C-class activity was observed from Regions 4274 (N25, L=274), 4284 (S07, L=177, class/area Dai/150 on 19 Nov), 4290 (S10, L=035, class/area Cao/120 on 22 Nov) and 4291 (S14, L=028, class/area Dao,120 on 22 Nov). No proton events were observed at geosynchronous orbit. The greater than 2 MeV electron flux at geosynchronous orbit reached high levels on 19-20 Nov with a peak flux of 2,880 pfu on 20/1435 UTC. Normal to moderate levels were reached on 17-18 Nov and 21-23 Nov. Geomagnetic field activity was at mostly quiet to unsettled levels with isolated active levels observed early on 17 Nov and midday on 23 Nov. Solar wind parameters were enhanced midday on 20 Nov when Bt reached 18 nT and Bz reached values at -10 nT. Solar wind speeds began the highlight period at about 550 km/s, declined to near 325 km/s early on 20 Nov and gradually increased to about 500 km/s late on 23 Nov. Forecast of Solar and Geomagnetic Activity 24 November - 20 December 2025 Solar activity is expected to be expected to be at R1-R2 (Minor-Moderate) levels on 28-30 Nov and 01-11 Dec, primarily due to the flare potential and return of old Region 4274. Mostly C-class activity is expected on 24-27 Nov and 12-20 Dec. No proton events are expected at geosynchronous orbit. The greater than 2 MeV electron flux at geosynchronous orbit is expected to be at high levels on 28-30 Nov, 01-03 Dec, 08-12 Dec and 16-17 Dec, all due to coronal hole influence. The remainder of the outlook period is likely to be at normal to moderate levels. Geomagnetic field activity is expected to range from quiet to G1-G2 (Minor-Moderate) geomagnetic storm levels. G1-G2 (Minor-Moderate) levels are likely on 26-27 Nov and 03-04 Dec due to anticipated influence from CH HSS. Unsettled to active conditions are likely on 24-25 Nov, 28-30 Nov, 05-07 Dec, 12-14 Dec and 17-19 Dec. Mostly quiet levels are likely on 01-02 Dec, 08-11 Dec, 15-16 Dec and 20 Dec. Space Weather Scales |
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| About AIA Images | |
| The Atmospheric Imaging Assembly (AIA) on the Solar Dynamics Observatory (SDO) is designed to provide an unprecedented view of the solar corona, taking images that span at least 1.3 solar diameters in multiple wavelengths nearly simultaneously, at a resolution of ~ 1 arcsec and at a cadence of 10 s or better. The primary goal of the AIA Science Investigation is to use these data, together with data from other SDO instruments and from other observatories, to significantly improve our understanding of the physics behind the activity displayed by the Sun's atmosphere, which drives space weather in the heliosphere and in planetary environments. The AIA will produce data required for quantitative studies of the evolving coronal magnetic field, and the plasma that it holds, both in quiescent phases and during flares and eruptions; the AIA science investigation aims to utilize these data in a comprehensive research program to provide new understanding of the observed processes Left Click Image for screen size, Right Click Image and open in new tab for full size. | |
| Daily Image AIA 171 | |
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| Daily Image AIA 171 PFSS Model | |
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| Daily Image AIA 193 | |
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| Daily Image AIA 304 | |
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| Daily Video AIA 171 | |
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| Daily Video AIA 171 PFSS Model | |
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| Daily Video AIA 193 | |
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| Daily Video AIA 304 | |
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| About the HMI Images | |
| (Helioseismic and Magnetic Imager) HMI is an instrument designed to study oscillations and the magnetic field at the solar surface, or photosphere. HMI is one of three instruments on the Solar Dynamics Observatory; together, the suite of instruments observes the Sun nearly continuously and takes a terabyte of data a day. HMI observes the full solar disk at 6173 Å with a resolution of 1 arcsecond. HMI is a successor to the Michelson Doppler Imager on the Solar and Heliospheric Observatory. This is very much how the Sun looks like in the visible range of the spectrum (for example, looking at it using special 'eclipse' glasses: Remember, do not ever look directly at the Sun!). The magnetogram image shows the magnetic field in the solar photosphere, with black and white indicating opposite polarities. Left Click Image for screen size, Right Click Image and open in new tab for full size. | |
| Daily Image HMI Continuum | |
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| Daily Image HMI Magnetogram | |
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| About LASCO Images | |
| LASCO (Large Angle Spectrometric Coronagraph) is able to take images of the solar corona by blocking the light coming directly from the Sun with an occulter disk, creating an artificial eclipse within the instrument itself. The position of the solar disk is indicated in the images by the white circle. The most prominent feature of the corona are usually the coronal streamers, those nearly radial bands that can be seen both in C2 and C3. Occasionally, a coronal mass ejection can be seen being expelled away from the Sun and crossing the fields of view of both coronagraphs. The shadow crossing from the lower left corner to the center of the image is the support for the occulter disk. C2 images show the inner solar corona up to 8.4 million kilometers (5.25 million miles) away from the Sun. C3 images have a larger field of view: They encompass 32 diameters of the Sun. To put this in perspective, the diameter of the images is 45 million kilometers (about 30 million miles) at the distance of the Sun, or half of the diameter of the orbit of Mercury. Many bright stars can be seen behind the Sun. Left Click Image for screen size, Right Click Image and open in new tab for full size. | |
| Combined C2 C3 and AIA 304 | |
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| Log Polar View C2 C3 and AIA 304 | |
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| Combined C2 C3 and AIA 304 Video | |
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| Log Polar View C2 C3 and AIA 304 Video | |
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| Space Weather Videos | |
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| Space Weather Information | |
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Demystifying Space Weather An article by Scientific Frontline Informative information and glossary about “Space Weather” Space weather has become increasingly important in our modern world due to our growing reliance on technology. It can impact various aspects of our daily lives, from communication and navigation systems to power grids and even astronaut safety. In this deep dive, we'll explore the intricacies of space weather, its causes, its effects, and why understanding it is crucial in our technology-dependent society. |
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