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| Warnings and Alerts | |
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Issue Time: 2026 Aug 09 1338 UTC
WATCH: Geomagnetic Storm Category G1 Predicted Highest Storm Level Predicted by Day: Aug 10: None (Below G1) Aug 11: None (Below G1) Aug 12: G1 (Minor) THIS SUPERSEDES ANY/ALL PRIOR WATCHES IN EFFECT Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude. Induced Currents - Weak power grid fluctuations can occur. Spacecraft - Minor impact on satellite operations possible. Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine. Space Weather Scales |
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| Current Condition and Alerts | |
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Issued: 2026 Aug 10 1205 UTC
Prepared
by the US Dept. of Commerce, NOAA, Space Weather Prediction
Center
Geophysical Alert Message Solar-terrestrial indices for 09 August follow. Solar flux 94 and estimated planetary A-index 7. The estimated planetary K-index at 1200 UTC on 10 August was 2.00. No space weather storms were observed for the past 24 hours. No space weather storms are predicted for the next 24 hours. Space Weather Scales |
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| Forecast Discussion | |
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Issued: 2026 Aug 10 1230 UTC
Prepared
by the U.S. Dept. of Commerce, NOAA, Space Weather Prediction
Center
Solar Activity .24 hr Summary... Solar activity returned to low levels with weak C-class activity observed from new Region 4505 (N15W85, Dao/beta). This region emerged near the west limb and produced numerous B-class and weak C-class events. New Region 4506 (N10E48, Axx/alpha) was numbered this period and produced B-class activity. No Earth-directed CMEs were observed in available coronagraph imagery. .Forecast... Solar activity is expected to be remain at low levels on 10 Aug, purely due to the flare potential of Region 4505, before decreasing back to very low levels on 11-12 Aug. Solar Orbiter PHI imagery suggests no significant returning regions during the forecast period. Energetic Particle .24 hr Summary... The greater than 2 MeV electron flux at geosynchronous orbit was at moderate levels. The greater than 10 MeV proton flux at geosynchronous orbit remained at background levels. .Forecast... The greater than 2 MeV electron flux is expected to remain at very low to low levels through 12 Aug. The greater than 10 MeV proton flux is expected to remain at background levels through 12 Aug. Solar Wind .24 hr Summary... Solar wind parameters reflected a gradual return to background conditions after the arrival of the CME early on 08 Aug. Total field (Bt) was steady at 5-6 nT, while the Bz component varied between +/-5 nT. Solar wind speed was steady at 400-465 km/s and the phi angle was in a steady negative sector. .Forecast... Moderate background conditions are expected to continue through 10 Aug. The anticipated arrivals of another CH HSS and a CME that left the Sun on 08 Aug are expected to produce a disturbed solar wind late on 11 Aug and into 12 Aug. Geospace .24 hr Summary... The geomagnetic field was at quiet levels. .Forecast... 10 Aug is expected to remain at quiet to isolated unsettled levels. Unsettled conditions are expected to persist through 11 Aug, with the potential for an isolated active period, due to anticipated onset of a positive polarity CH HSS. Active conditions, with the potential for an isolated G1 (Minor) storm period, are anticipated on 12 Aug due to the arrival of a CME that left the Sun on 08 Aug. Space Weather Scales |
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| Three Day Forecast | |
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Issued: 2026 Aug 10 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 2 (below NOAA Scale levels). The greatest expected 3 hr Kp for Aug 10-Aug 12 2026 is 4.67 (NOAA Scale G1). NOAA Kp index breakdown Aug 10-Aug 12 2026 Aug 10 Aug 11 Aug 12 00-03UT 1.67 2.67 3.67 03-06UT 1.00 3.00 4.67 (G1) 06-09UT 1.67 2.33 3.67 09-12UT 2.00 1.67 3.33 12-15UT 2.00 2.00 2.67 15-18UT 2.00 2.00 2.33 18-21UT 2.00 3.00 3.33 21-00UT 2.33 3.67 3.33 Rationale: G1 (Minor) geomagnetic storming is likely on 12 Aug due to anticipated CME activity. 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 Aug 10-Aug 12 2026 Aug 10 Aug 11 Aug 12 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 Aug 10-Aug 12 2026 Aug 10 Aug 11 Aug 12 R1-R2 1% 1% 1% R3 or greater 1% 1% 1% Rationale: No R1 (Minor) or greater radio blackouts are expected. No significant active region flare activity is forecast. Space Weather Scales |
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| Weekly Highlights and Forecasts | |
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Issued: 2026 Aug 10 0153 UTC
Prepared
by the US Dept. of Commerce, NOAA, Space Weather Prediction
Center
Highlights of Solar and Geomagnetic Activity 03 - 09 August 2026 Solar activity was at very low to low levels throughout the period, with no R1 (Minor) or greater events observed. Other activity three CMEs associated with DSFs on 03 Aug, which arrived on 07 Aug, as well as two CMEs without clear source locations on 04 Aug, which arrived at Earth on 08 Aug. No proton events were observed at geosynchronous orbit. The greater than 2 MeV electron flux at geosynchronous orbit was at normal to moderate levels throughout the period. Geomagnetic field activity reached G1-G2 (Minor-Moderate) storm levels on 08 Aug following the arrival of CMEs that left the Sun on 04 Aug. Active conditions were observed on 03-04 Aug following the arrival of a CME that left the Sun on 30 Jul. Quiet and quiet to unsettled levels prevailed throughout the remainder of the period. Forecast of Solar and Geomagnetic Activity 10 August - 05 September 2026 Solar activity is expected to range from very low to low levels throughout the outlook period. No proton events are expected at geosynchronous orbit. The greater than 2 MeV electron flux at geosynchronous orbit is expected to reach high levels on 12-16 and 22-23 Aug. Normal to moderate levels are expected to prevail throughout the remainder of the period. Geomagnetic field activity is likely to reach G1 (Minor) storm levels on 11 Aug due to the anticipated arrival of a CME that left the Sun on 08 Aug, and again on 19 Aug due to recurrent CH HSS influences. Active conditions are likely on 10 and 17-18 Aug, while quiet and quiet to unsettled conditions are likely to prevail throughout the remainder of the outlook period. 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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| Daily Video HMI Continuum | |
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| Daily Video 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. |
