Tag: high_frequency_communication

Strong Solar Flare Triggers R3 Radio Blackout

30 Jun 2026 5:05 p.m. · Source: NOAA

A strong X1.1 solar flare on June 30, 2026, caused an R3 radio blackout, disrupting high-frequency communications for about an hour across Earth's sunlit side. The event peaked at 20:50 UTC, impacting wide areas.

Science & Technology Astronomy and Space Environment Computers and Internet Solar Flare X-ray Event Radio Blackout Space Weather NOAA High-Frequency Communication Earth Solar Flares