Multiple M-class solar flares, including M1.6 and M4.4, erupted on April 23, 2026, producing coronal mass ejections (CMEs). Meanwhile, Active Region 4420 exhibited significant growth in area and magnetic complexity as it moves toward the center of solar disk, raising the potential for Earth-directed CMEs in the days ahead.
A G2 – Moderate geomagnetic storm watch is in effect for April 17 and 18, 2026, due to an incoming coronal hole high-speed stream expected to enhance solar wind conditions by late April 17. The event could cause minor operational impacts on high-latitude power systems, satellites, and HF radio communications, while increasing the chance of aurora sightings across northern U.S. states.
A strong solar flare measuring M7.5 erupted from Active Region 4409 at 01:17 UTC on April 4, 2026. The event started at 01:07 and ended at 01:23 UTC. No radio signatures indicating a coronal mass ejection (CME) were detected, despite the region’s position near the center of the solar disk, where any CME produced would likely be Earth-directed. Forecast conditions indicate solar activity will likely remain at moderate levels through April 6, with a slight chance of X-class flares, while geomagnetic conditions are expected to reach G1 – Minor to G2 – Moderate storm levels on April 4 under the combined influence of the April 1 CME and a negative polarity coronal hole high-speed stream.
A filament eruption associated with a C6.1 solar flare from Active Region 4403 at 23:28 UTC on April 1, 2026, produced an asymmetric halo coronal mass ejection. Initial modeling indicates the bulk of the ejecta is directed north of Earth’s orbit, with a possible glancing impact early on April 4 that could trigger minor to moderate geomagnetic storming. Current geomagnetic conditions remain influenced by a combined coronal hole high-speed stream and prior CME activity.
A major solar flare measuring X1.4 at its peak erupted from Active Region 4405 at 03:19 UTC on March 30, 2026. The event started at 02:47 and ended at 03:44 UTC. It produced a large partial-halo CME, with a glancing blow to Earth expected around 18:00 UTC on March 31.
A G3 – Strong geomagnetic storm developed late on March 20 into early March 21, 2026, after a coronal mass ejection that left the Sun on March 18 impacted Earth. The storm intensified after at least two CME arrivals, with solar wind speeds reaching 567 km/s and the interplanetary magnetic field turning strongly southward to −28 nT.
An Earth-directed coronal mass ejection (CME) produced by an M2.7 solar flare on March 16, 2026, is expected to impact Earth on March 19, producing G2 – Moderate geomagnetic storming and aurora at mid-latitudes.
A moderately strong solar flare measuring M2.7 erupted from Active Region 4392 at 12:15 UTC on March 16, 2026. The event lasted 24 minutes.
A G1 – Minor geomagnetic storm is in progress on February 22, 2026, with Kp index values reaching 5 since 03:00 UTC, according to the NOAA Space Weather Prediction Center (SWPC). At 08:00 UTC, the agency issued a G2 – Moderate warning valid through 15:00 UTC, forecasting a possible rise to Kp 6 later in the day as solar-wind conditions remain elevated.
A positive polarity coronal hole high speed stream currently interacting with Earth’s magnetic field produced a G2 – Moderate geomagnetic storm, with the K-index peaking at 6 at 20:00 UTC on February 16, 2026. The storm may generate visible aurora across northern U.S. latitudes and cause minor operational effects in satellite and power systems.
