NOAA Reports Moderate Solar Flare Causing Radio Blackouts

A moderate R2-class solar flare, an M5.8 X-ray event, occurred on June 30, 2026, causing limited high-frequency (HF) radio communication blackouts. The event, issued by NOAA, primarily impacted the sub-solar point on Earth's sunlit side.

The X-ray flare began at 12:37 UTC, peaked at 12:57 UTC, and concluded by 13:23 UTC. Originating from location S07W55 on the sun, it was also classified as an Optical Class 3b event.

This R2-Moderate classification indicates potential for limited blackouts of HF radio communication lasting for tens of minutes, affecting areas centered on the sub-solar point.