Sun news: Monstrous sunspots depart with a fiery show

Sun news July 7: Monstrous sunspots depart with a fiery show

(11 UTC July 6 – 11 UTC July 7)

Today’s top story: The monstrous sunspot regions that put on an impressive show over the past week have now fully departed to the far side of our star. As they crossed the western horizon, these active regions continued to show off their power, producing fiery jets and prominences. Now, with the big active regions on the far side, nearly all flare responsibility on the Earth-viewed side falls to active region AR4482. And with a beta-gamma complexity, this region is showing promising potential.

Past 24 hours on the sun

Flare activity: Solar activity dropped to low levels over the past day. Observers registered 5 flares, all C-class (common) events.

• Strongest flare: A C3.8 from active region AR4479 peaking at 18:40 UTC on July 6.
• Lead flare producer: AR4482 and AR4478 ended tied at the top. Each produced two C flares during this period.

Sunspot regions: Currently, 4 numbered active regions appear on the Earth-facing solar disk.

• • AR4478 (beta-gamma): This region now sits at the very edge of the southwest horizon. It will soon depart to the far side.
  • AR4482 (beta-gamma): This region ranks as the largest active region and has a promising beta-gamma magnetic complexity.
  • AR4485 (beta) and AR4481 (beta): Both have a simple beta configuration and remained stable with no flare production over the past day.

Blasts from the sun? Observers spotted no Earth-directed coronal mass ejections (CMEs) in available coronagraph imagery.

Past 24 hours in space weather

Solar wind: Solar wind conditions gradually eased from moderate to moderate-low levels during this period.

Bz and magnetic coupling: Meanwhile, the interplanetary magnetic field total strength (Bt) remained relatively weak. The Bz component pointed southward during the first half of the period. Then, starting at around 0 UTC this morning, it shifted northward. It has held that direction until the time of this writing. As a result, aurora activity stayed subdued.

Earth’s magnetic field: The geomagnetic field showed very quiet levels throughout the period. This corresponds to Kp values of 0–2. At the time of this writing, the Kp index sits just below 2.

What’s ahead? Sun–Earth forecast

Flare activity forecast: We expect moderate activity today. The chance of M (moderate) flares is 55%. Meanwhile, the chance for an X-class (strong) flare has dropped to 10%. With AR4479 gone to the far side and AR4478 at the western limb ready to follow, AR4482 remains the main driver of solar activity.

In addition, a slight chance for S1 (minor) solar radiation storms persists today. The monstrous active regions remain close to the limb. Consequently, continued flaring on the western horizon could channel charged particles magnetically toward Earth.

Geomagnetic activity forecast:

• July 7: Expect mostly quiet to unsettled conditions (Kp 1–3). However, the July 3 CME shock front may arrive around 10:00 UTC, with the leading edge following around 20:00 UTC. Model runs suggest Kp 2–4. In other words, active intervals are possible but full storm conditions are unlikely.
• July 8: Anticipate quiet to unsettled levels (Kp 1–3) as CME influences wane. Flare activity should also decrease as the most active western-limb regions complete their departure.
• July 9: A coronal hole high-speed stream should start affecting Earth. Additionally, the fast CME from July 5 has a modeled arrival around 6 UTC. Combined, these could produce G1 (minor) geomagnetic storm conditions. Auroras may then appear over Seattle, Edinburgh and the northern tier of the United States and Canada.

Sun news July 6: AR4479 exits the stage with a bang

(11 UTC July 5 – 11 UTC July 6)

The sun fired off a barrage of flares over the past 24 hours. Forecasters logged 6 M-class (moderate) flares and 15 C-class (common) flares during the period, nearly all of which came from the prolific sunspot AR4479. The most powerful of these was an M5.3 from AR4479 at 17:51 UTC yesterday, which caused an R2 (moderate) radio blackout across the Americas. It was an impressive farewell from AR4479, with this prolific flare factory now having rotated almost fully out of view over the western horizon.

Past 24 hours on the sun

Flare activity: Solar activity remained high. Observers recorded 21 flares: 6 M-class and 15 C-class events.

• Strongest flare: An M5.3 from AR4479 peaking at 17:51 UTC on July 5. It triggered an R2 (moderate) radio blackout. The blackout temporarily degraded high-frequency radio communications across the sunlit Americas and eastern Pacific. This affected aviation and maritime operations.
• Other M-class flares: M1.4 at 16:41 UTC on July 5 from AR4479; M1.4 at 16:21 UTC on July 5 from AR4479; M1.4 at 18:56 UTC on July 5 from AR4479; M1.0 at 21:14 UTC on July 5 from AR4479. In addition, AR4478 fired an M1.4 at 11:00 UTC on July 5, that region’s sole notable contribution. All M-class events produced R1 (minor) radio blackouts.
• Lead flare producer: AR4479 produced the overwhelming majority of activity. It fired at least 18 of the 21 flares, including all six M-class events and most of the stronger C-class flares (C9.6, C9.5, C8.1, C7.3, C6.1, C5.9, C5.0 and others).

Sunspot regions: The Earth-facing solar disk displayed seven numbered active regions. Forecasters cataloged 2 new regions during the period.

• • AR4479 (beta-gamma-delta) dominated flare production and now sits right on the western limb. The viewing angle now makes detailed magnetic analysis difficult. Even so, sustained high flare output strongly suggests at least one delta configuration persists. This region produced the vast majority of the period’s activity. We expect it to rotate out of view by July 7.
  • AR4478 (beta-gamma) ranked as the second-most complex region on the disk. However, it stayed mostly quiet this period aside from a lone M1.4 flare. The trailing portion continued to decay.

The remaining regions hold either of alpha or beta complexity.

Blasts from the sun? Observers spotted several coronal mass ejections (CMEs) in LASCO coronagraph imagery during the period. However, the vast majority lacked an Earth-directed component.

Past 24 hours in space weather

Solar wind: Solar wind conditions gradually eased to near normal as the lingering influence of the June 30 CME faded.

Bz and magnetic coupling: Meanwhile, the interplanetary magnetic field total strength (Bt) remained relatively weak, keeping aurora activity subdued.

Earth’s magnetic field: The geomagnetic field held at a steady unsettled-to-active level throughout the period. This corresponds to Kp values of 2–3. After a round of geomagnetic storms and auroras over the weekend, no geomagnetic storm thresholds were reached over the past day.

The sun in recent days

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Bottom line: Sun news July 7, 2026: Last week’s monster active regions have rotated to the sun’s far side, exiting in fiery style. AR4482 now takes center stage.

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