The NOAA GOES satellites detected a moderate M4.0-class solar flare on July 7, 2026, at 2:19 p.m. UTC. The flare produced significant X-ray energy (4.0e-5 W/m²) and triggered an R1-class radio blackout on the sunlit side of Earth—meaning some shortwave radio frequencies are temporarily disrupted.
What You Might Notice
Radio blackouts primarily affect aviation, maritime, and amateur radio operators. If you rely on shortwave radio, emergency frequencies, or GPS-dependent systems, you may experience minor disruptions lasting from minutes to hours. Most everyday cell phone and internet users will see no effect. Power grids in North America and Europe have proven resilient to R1-level events.
What Happens Next
Solar flares often travel with clouds of charged plasma called coronal mass ejections (CMEs). If one was launched toward Earth, it could arrive in 1 to 3 days, potentially triggering a geomagnetic storm. Geomagnetic storms can enhance auroras and, in rare cases, affect satellite operations and power infrastructure.
What to Watch
Monitor the Kp index (a measure of geomagnetic activity) over the next 72 hours. A Kp reading of 5 or higher indicates a geomagnetic storm watch. Second, check airline and maritime advisories if your work depends on radio communications. Third, if you operate solar-dependent systems (like off-grid solar or satellite internet), stay alert for any provider notices about temporary service interruptions.
This is a routine event in the solar cycle—not unusual, not dangerous to the general public, but worth awareness for those who depend on radio or space-based systems. Keep your emergency radio batteries fresh and your flashlights accessible as part of ongoing preparedness.
Real-time space weather data comes from NOAA. Visit the live dashboard at https://survivalsiren.com/spaceweather/feed.html for updates.