A major solar flare measuring X1.1 at its peak erupted from newly numbered Active Region 2994 at 03:34 UTC on April 17, 2022. The event started at 03:17 UTC and ended at 03:51. A coronal mass ejection (CME) was produced during the event but the location of the source region does not favor Earth-directed CMEs. This will change in the days ahead as the region turns into geoeffective position.
This event was associated with a Type II radio sweep, with estimated velocity of 614 km/s, and a 10 cm Radio Burst lasting 2 minutes, with peak flux of 122 sfu.
Type II emissions occur in association with eruptions on the Sun and typically indicate a coronal mass ejection is associated with a flare event.
A 10cm radio burst indicates that the electromagnetic burst associated with a solar flare at the 10cm wavelength was double or greater than the initial 10cm radio background. This can be indicative of significant radio noise in association with a solar flare. This noise is generally short-lived but can cause interference for sensitive receivers including radar, GPS, and satellite communications.
A coronal mass ejection (CME) was observed in SOHO/LASCO C2 imagery starting at 03:48 UTC.
Region 2994 and Region 2993 form a cluster of active sunspots that have produced significant flaring prior to appearing on the eastern limb.
Solar activity is expected to be active over the next week as these sunspots migrate across the visible disk.
Featured image credit: NASA SDO/AIA304
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