Two Moderately Strong Solar Flares Erupt from Region 2644
M4.4 and M5.3
Two moderately strong solar flares measuring M4.4 and M5.3 erupted from Active Region 2644 (beta) on April 1 and 2, 2017. The M4.4 event started at 21:35, peaked at 21:48 and ended at 22:05 UTC. It was the first M-class solar flare since November 29, 2016 and the strongest since M5.5 on July 23, 2016.
A Type IV Radio Emission was registered at 21:50 UTC. Type IV emissions occur in association with major eruptions on the Sun and are typically associated with strong coronal mass ejections (CMEs) and solar radiation storms. However, the plasma cloud appears to be headed to the northwest and away from our planet.
Another M-class solar flare erupted from Region 2644 on April 2. This one started at 07:50, peaked at 08:02 UTC as M5.3 and ended at 08:13 UTC.
A Type IV Radio Emission was registered beginning at 08:00 UTC, indicating a strong coronal mass ejection and solar radiation storm. A Type II Radio Emission (estimated velocity 628 km/s) was registered at 08:07 UTC. Type II emissions occur in association with eruptions on the Sun and typically indicate a coronal mass ejection is associated with a flare event.
The location of this region does not favor Earth-directed CMEs.
Region 2644 (beta) developed additional spots to the north and west of its large leader spot resulting in a slight increase in area and spot count on April 1. The M4.4 flare appears to originate in the vicinity of the new spot growth.
Region 2645 (beta-gamma) continued to exhibit area growth, but remained relatively quiet over the past 24 hours, producing only weak B-class activity. New Region 2648 rotated onto the disk yesterday and produced a few weak B-class flares.