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| Date | Subscriber Growth | Mentions | Channels | |
| 06 September | +1 | |||
| 05 September | +1 | |||
| 04 September | 0 | |||
| 03 September | +1 | |||
| 02 September | 0 | |||
| 01 September | 0 |
Channel Posts
| 2 |  No text... | 38 |
| 3 |  No text... | 36 |
| 4 |  No text... | 57 |
| 5 | No text... | 48 |
| 6 |  No text... | 52 |
| 7 | :Product: Forecast Discussion
:Issued: 2026 Sep 07 0030 UTC
# Prepared by the U.S. Dept. of Commerce, NOAA, Space Weather Prediction Center
#
Solar Activity
.24 hr Summary...
Solar activity decayed down to low levels. The largest flare of the
period was a C5.0/1n from Region 4524 (N12E26, Cao/beta-gamma) observed
at 06/1042 UTC. This region continued to exhibit weak decay. New Region
4528 (S11E64, Hsx/alpha) produced a C1.1 flare at 06/1334 UTC. The
remaining existing regions on the disk were quiet and stable.
A halo CME associated with the C5.0 first became visible in LASCO C2
imagery at 06/1112 UTC and in STEREO coronagraph imagery at 06/1053 UTC.
Modeling suggests a potential arrival at Earth late on 08 Sep-early on
09 Sep.
Several additional CMEs were observed over the past 24-36 hours. These
CMEs were described at length in the previous discussion. Modeling
suggests a possible combined arrival for these eruptions on early 08
Sep.
.Forecast...
Solar activity will likely be at low levels due to occasional C-class
flare activity, with a slight chance for M-class flares
(R1-R2/Minor-Moderate) through 09 Sep.
Energetic Particle
.24 hr Summary...
The greater than 2 MeV electron flux reached high levels at 06/1805 UTC.
The greater than 10 MeV (S1-Minor) proton flux began rising at 05/1530
UTC and exceeded the 10 pfu event level at 05/1615 UTC with a peak
flux of 17.8 pfu observed at 05/1645 UTC, and ended the event at 05/2135
UTC.
The greater than 100 MeV proton flux began rising at 05/1530 UTC and
also exceeded the 1 pfu event threshold at 05/1545 UTC, reaching a max
of 1.16 pfu at 05/1550 UTC. Levels decayed below the 1 pfu levels at
05/1615 UTC and ended the period near background levels.
.Forecast...
The greater than 2 MeV electron flux is expected to be at normal to
moderate levels on 07-08 Sep and increase to high levels on 09 Sep. The
greater than 10 MeV proton flux is expected to continue decreasing
towards background levels through early 08 Sep. Levels could increase
back up to equal or exceed threshold levels by midday on 08 Sep if the
anticipated CMEs impact Earth.
Solar Wind
.24 hr Summary...
Solar wind parameters were largely at nominal levels, with total field
(Bt) averaged near 6 nT, the Bz component fluctuated between +/-5 nT,
and solar wind speeds averaged around 350 km/s. Phi was predominantly
negative with isolated oscillations into a positive orientation. The
exception was the IMF beginning at roughly 06/2040 UTC, when a coherent
magnetic structure began rotating through the near-Earth environment,
with Bt reaching a max of 10 nT by the end of the reporting period.
.Forecast...
Solar wind enhancements, due to a solar sector boundary crossing
(SSBC) combined with influence from a filament CME that left the Sun on
02 Sep, are anticipated to continue through 07 Sep. Further enhancements
are
likely 08 Sep through 09 Sep with the anticipated arrival of the
multitude of CMEs from the past couple of days combined with the onset
of the CH HSS.
Geospace
.24 hr Summary...
The geomagnetic field was quiet.
.Forecast...
Unsettled to periodic active levels are possible on 07 Sep due to
aforementioned SSBC effects. Unsettled to active levels are then
expected on 08 Sep, with isolated G1 (Minor) periods likely if the CMEs
mentioned above impact Earth as forecast. Confidence is low on the
timing and magnitude of the CME arrivals. | 50 |
| 8 |  No text... | 45 |
| 9 |  No text... | 44 |
| 10 |  No text... | 87 |
| 11 |  No text... | 106 |
| 12 |  No text... | 111 |
| 13 | Space Weather Message Code: ALTEF3
Serial Number: 3736
Issue Time: 2026 Sep 06 1824 UTC
ALERT: Electron 2MeV Integral Flux exceeded 1,000pfu
Threshold Reached: 2026 Sep 06 1822 UTC
Station: GOES-19
Comment: | 120 |
| 14 |  No text... | 122 |
| 15 |  No text... | 166 |
| 16 | Space Weather Message Code: WATA20
Serial Number: 1122
Issue Time: 2026 Sep 06 1212 UTC
WATCH: Geomagnetic Storm Category G1 Predicted
Highest Storm Level Predicted by Day:
Sep 06: None (Below G1) Sep 07: None (Below G1) Sep 08: G1 (Minor)
THIS SUPERSEDES ANY/ALL PRIOR WATCHES IN EFFECT
Comment:
NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation
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. | 168 |
| 17 |  No text... | 143 |
| 18 | Space Weather Message Code: SUMPX1
Serial Number: 134
Issue Time: 2026 Sep 06 1155 UTC
SUMMARY: Proton Event 10MeV Integral Flux exceeded 10pfu
Begin Time: 2026 Sep 05 1615 UTC
Maximum Time: 2026 Sep 05 1645 UTC
End Time: 2026 Sep 05 2135 UTC
Maximum 10MeV Flux: 18 pfu
Noaa Scale: S1 - Minor
Comment:
NOAA Scale: S1 - Minor | 138 |
| 19 |  No text... | 581 |
| 20 |  No text... | 153 |
