Home / Science / Sun's Fury: X-Class Flare Triggers Global Radio Blackout
Sun's Fury: X-Class Flare Triggers Global Radio Blackout
24 Apr
Summary
- An X-class solar flare caused a strong radio blackout on Earth.
- Radiation from the flare supercharged the ionosphere's D-layer.
- Future CMEs could potentially disrupt satellites and power grids.

An X-class solar flare, the most powerful category of solar eruption, recently occurred, sending intense radiation towards Earth. This radiation traveled at the speed of light, reaching our planet in approximately eight minutes. The energy bombarded Earth's ionosphere, a layer of charged particles in the upper atmosphere. Specifically, the flare's radiation supercharged the D-layer of the ionosphere. This increased electrical activity caused high-frequency radio waves, used for global communication, to be absorbed rather than reflected, resulting in a temporary radio blackout.
The blackout typically lasts from minutes to an hour and affects only the sunlit side of Earth. Solar flares are caused by snapping magnetic fields near sunspots on the Sun's surface. While this event primarily caused a radio blackout, X-class flares can also produce coronal mass ejections (CMEs). If a CME is directed at Earth, it could lead to geomagnetic storms in one to three days, potentially disrupting satellites, GPS, and power grids.