|
|
| Warnings and Alerts | |
| No Current Warnings Space Weather Scales | |
| Current Condition and Alerts | |
|
Issued: 2026 Aug 06 1205 UTC
Prepared
by the US Dept. of Commerce, NOAA, Space Weather Prediction
Center
Geophysical Alert Message Solar-terrestrial indices for 05 August follow. Solar flux 108 and estimated planetary A-index 3. The estimated planetary K-index at 1200 UTC on 06 August was 0.67. 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 |
|
| Forecast Discussion | |
|
Issued: 2026 Aug 06 1230 UTC
Prepared
by the U.S. Dept. of Commerce, NOAA, Space Weather Prediction
Center
Solar Activity .24 hr Summary... Solar activity was at very low levels. Regions 4498 (N14W57, Hsx/alpha), 4500 (N18W53, Hrx/alpha), 4502 (S08W53, Dao/beta) and 4503 (S16E40, Bxo/beta) were all relatively stable and quiet. No Earth-directed CMEs were observed in available coronagraph imagery. .Forecast... A slight chance (10%) for isolated R1-R2 (Minor-Moderate) radio blackouts from M-class flare activity will persist through 08 August. Current Solar Orbiter HMI 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 low to moderate levels through 08 Aug. The greater than 10 MeV proton flux is expected to remain at background levels over 06-08 Aug. Solar Wind .24 hr Summary... Solar wind parameters remained at quiet, ambient levels throughout the period. Total interplanetary magnetic field strength (Bt) held weak, staying below 3 nT. Solar wind speeds reflected a slow wind regime and gradually declined to near 300 km/s by the end of the reporting period. Phi was predominantly in a positive solar sector. .Forecast... Solar wind parameters are expected to remain in a slow wind regime through early 07 Aug. By late 07 Aug, enhancements are anticipated to begin due to the arrival of CMEs that departed the Sun on 03 Aug. These CME enhancements may persist into 08 Aug, alongside potential weak influences from a negative polarity coronal hole high-speed stream (-CH HSS) that is likely too far south to become significantly geoeffective. Geospace .24 hr Summary... The geomagnetic field was at quiet levels throughout the period. .Forecast... Geomagnetic conditions are expected to remain quiet into 07 Aug. Active conditions with a chance for G1 (Minor) geomagnetic storming are possible late on 07 Aug in response to CME arrivals, with unsettled conditions likely persisting into 08 Aug as CME influences wane. Space Weather Scales |
|
| Three Day Forecast | |
|
Issued: 2026 Aug 06 1250 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 1 (below NOAA Scale levels). The greatest expected 3 hr Kp for Aug 06-Aug 08 2026 is 3.67 (below NOAA Scale levels). NOAA Kp index breakdown Aug 06-Aug 08 2026 Aug 06 Aug 07 Aug 08 00-03UT 1.33 1.67 2.67 03-06UT 1.33 1.67 2.00 06-09UT 0.67 1.33 2.33 09-12UT 0.67 1.33 2.67 12-15UT 1.00 2.67 2.67 15-18UT 1.00 3.33 2.00 18-21UT 1.00 3.67 2.00 21-00UT 1.33 3.33 2.33 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 Aug 06-Aug 08 2026 Aug 06 Aug 07 Aug 08 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 06-Aug 08 2026 Aug 06 Aug 07 Aug 08 R1-R2 15% 10% 10% R3 or greater 1% 1% 1% Rationale: With ongoing region decay and several active regions in the western hemisphere expected to rotate off the disk over the coming days, there is a decreasing chance for M-class (R1-R2/Minor-Moderate) flares over 06-08 Aug. Current Solar Orbiter HMI imagery suggests no significant returning regions during the forecast period. Space Weather Scales |
|
| Weekly Highlights and Forecasts | |
|
Issued: 2026 Aug 03 0413 UTC
Prepared
by the US Dept. of Commerce, NOAA, Space Weather Prediction
Center
Highlights of Solar and Geomagnetic Activity 27 July - 02 August 2026 Solar activity reached Moderate levels during the period, with a total of 35 C-class flares and 2 R1 (Minor) radio blackouts events. Region 4494 (S05, L=88) produced an M1.0/Sf peaking at 27/0243 UTC and Region 4492 (N=15, L=107, class/area Cko/310 on 26 July) produced the largest flare of the week, a long-duration M1.9/Sf that peaked at 30/1700 UTC. This event was accompanied by a partial-halo CME and a simultaneous eight-degree-long filament eruption, centered near N20W67. Associated with these 30 Jul events, two Type II radio sweeps were observed at 30/1627 UTC and 30/1645 UTC, with estimated shock speeds of 843 km/s and 1,681 km/s, respectively. Other radio events included a Type IV sweep at 30/1631 UTC and a 17-minute-long Tenflare (190 sfu) that peaked at 30/1643 UTC. Analysis of the CME propagation indicated an Earth-directed component with estimated velocity of 878 km/s that was anticipated to disturb the Geospace on Aug 02, which was later confirmed by a Sudden Impulse observed on 02/1229 UTC (with deviation of 27 nT) and further geomagnetic activity enhancement. The greater than 10 MeV proton flux crossed the S1 (Minor) solar radiation event threshold twice during the period: first at 30/1845 UTC (reaching a peak of 18 pfu at 30/2055 UTC); and, after returning to levels below S1 around 30/0715 UTC, the flux got elevated again and crossed the threshold of 10pfu at 31/1335 UTC. Additionally, the greater than 100 MeV proton flux briefly exceeded 1pfu at 30/1835. All proton flux enhancements were likely associated with the M1.9/Sf flare mentioned above. The greater than 2 MeV electron flux at geosynchronous orbit reached high levels on 27 Jul and 01 Aug, with the maximum value of the period (1,379 pfu) observed at 27/1630 UTC. Geomagnetic activity was at Quiet to G2 (Moderate) levels during the week. Unsettled levels were observed on 27-28 Jul, followed by quiet levels on 29 Jul to 01 Aug. On 02 Aug, active levels were observed, with an isolated synoptic period of G2 (Moderate) storming level due to the impact of the abovementioned CME that left the Sun on 30 Jul. Forecast of Solar and Geomagnetic Activity 03 August - 29 August 2026 Solar activity is expected to be predominantly at low levels, with a chance for R1-R2 (Minor-Moderate) levels throughout the outlook period. No proton events (greater than 10 MeV) are expected at geosynchronous orbit. The greater than 2 MeV electron flux at geosynchronous orbit is expected to reach high levels on 12-16 Aug and 22-23 Aug due to recurrent high speed streams. Normal to moderate electron flux levels are expected for the remaining days of the outlook period. Geomagnetic activity is expected to reach G1 (Minor) storming levels on 03 Aug (as the ongoing CME disturbances persist and wane) and on 19 Aug (due to the anticipated effects of a High Speed Stream originated in a negative polarity Coronal Hole). Active levels are expected on 17-18 Aug, due to the -CH HSS previously mentioned. Unsettled levels are expected on 04, 11-12 and 20 Aug, and Quiet levels on the remaining days of the outlook period. Space Weather Scales |
|
| 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 | |
 |
|
| Daily Image AIA 171 PFSS Model | |
 |
|
| Daily Image AIA 193 | |
 |
|
| Daily Image AIA 304 | |
 |
|
| Daily Video AIA 171 | |
 |
|
| Daily Video AIA 171 PFSS Model | |
 |
|
| Daily Video AIA 193 | |
 |
|
| Daily Video AIA 304 | |
 |
|
| 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 | |
 |
|
| Daily Image HMI Magnetogram | |
 |
|
| Daily Video HMI Continuum | |
 |
|
| Daily Video HMI Magnetogram | |
 |
|
| 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 | |
 |
|
| Log Polar View C2 C3 and AIA 304 | |
 |
|
| Combined C2 C3 and AIA 304 Video | |
 |
|
| Log Polar View C2 C3 and AIA 304 Video | |
 |
|
| Space Weather Videos | |
|
|
|
| Space Weather Information | |
|
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. |
