A strong, long-duration solar flare registered as M8.1 erupted from Active Region 4100 at 00:05 UTC on May 31, 2025. The flare began at 23:31 UTC on May 30 and ended at 01:32 UTC on May 31. The eruption produced a significant coronal mass ejection (CME). Model forecasts indicate that the CME is Earth-directed and is expected to arrive on June 1.
A moderately strong solar flare measuring M3.4 erupted from Active Region 4100 at 06:13 UTC on May 30, 2025. The event started at 05:40 and ended at 06:19 UTC. A coronal mass ejection (CME) may have been produced during the event, and there is a possibility that part of it is directed toward Earth.
A strong M5.6 solar flare erupted from Active Region 4046 at 07:55 UTC on April 1, 2025, producing a 10cm radio burst but showing no signs of an associated coronal mass ejection (CME). Meanwhile, a solar radiation storm triggered by the X1.1 flare on March 28 reached the S2 – Moderate threshold at 02:05 UTC today.
A moderately strong solar flare measuring M7.6 erupted from Active Region 3981 at 11:04 UTC on February 6, 2025. The event started at 10:47 and ended at 11:16 UTC.
A moderately strong solar flare measuring M8.8 erupted from Active Region 3981 at 03:58 UTC on February 3, 2025. The event started at 03:52 and ended at 04:04 UTC.
An impulsive solar flare registered as M5.1 erupted from Active Region 3977 at 14:04 UTC on February 2, 2025. The event started at 13:58 and ended at 14:08 UTC. With the region positioned at the center of the solar disk, the likelihood of Earth-directed activity remains elevated in the coming days. Meanwhile, the solar wind continues to be influenced by a positive polarity coronal hole high-speed stream, potentially leading to geomagnetic disturbances.
A strong solar flare measuring M6.7 erupted from Active Region 3978 at 14:06 UTC on January 31, 2025, producing a coronal mass ejection (CME). The event started at 13:40 and ended at 14:25 UTC. This is the strongest solar flare since M7.4 on January 17.
A coronal mass ejection (CME) produced by the M3.3 solar flare at 10:39 UTC on January 21, 2025, is expected to deliver a glancing blow from late January 24 into January 25. This was a long-duration flare that started at 10:08 UTC and ended at 11:00.
An impulsive solar flare measuring M7.4 erupted from Active Region 3964 at 13:35 UTC on January 17, 2025. The event started at 13:24 and ended at 13:39 UTC.
Solar activity increased to high levels on December 29 and 30, 2024, producing more than 20 M- and 3 X-class solar flares in just over 24 hours. At least one of these events produced an Earth-directed coronal mass ejection (CME) – with impact expected on December 31. As a result, a G3 – Strong Geomagnetic Storm Watch is in effect.
