What is a solar flare?
A sudden release of energy from the Sun's surface, often associated with sunspots.
Space Weather / Solar Flares
On November 28, 2025, a moderate M5.9 solar flare erupted from a newly emerging sunspot group. This event, classified as R2-Moderate on the radio blackout scale, has potential impacts on high-frequency (HF) radio communications and low-freq...
### Background Solar flares are sudden releases of energy from the Sun, often associated with sunspots. These flares are classified according to their strength, with M-class flares being moderate events that occur more frequently than stronger X-class flares. The NOAA Space Weather Prediction Center (SWPC) monitors these events to provide timely alerts and forecasts.
### Impact on Radio Communications The M5.9 flare caused a radio blackout, primarily affecting HF radio communications. This can impact aviation, marine operations, and amateur radio users. The degradation typically lasts for tens of minutes.
### Coronal Mass Ejections (CMEs) Analysts are currently examining imagery to determine whether the flare launched a CME. If a CME is directed toward Earth, it could cause geomagnetic storms, further disrupting technology and potentially causing auroras.
### How to Prepare - **Monitor Space Weather:** Stay informed about space weather conditions through resources like the NOAA SWPC website&ref=yanuki.com. - **Backup Communication:** Have alternative communication methods available in case of HF radio disruptions. - **Secure Equipment:** Protect sensitive electronic equipment from potential power surges related to geomagnetic storms.
A sudden release of energy from the Sun's surface, often associated with sunspots.
A coronal mass ejection is a large expulsion of plasma and magnetic field from the Sun’s corona.
Solar flares can disrupt radio communications, GPS signals, and power grids. CMEs can enhance these effects and cause geomagnetic storms.
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