A solar flare can be 'heard' faster than seen. Ordinary ground-based antennas catch changes in radio waves reflected from the ionosphere even before the X-rays reach satellites. This detector is cheap, reliable, and provides a minutes-long head start to safeguard power grids and communications.
🎯 The very low frequency waves used in this method can travel through water—which is why they are used to communicate with submarines at depth.
🎬 Now we're not just reading about space weather in sci-fi—we're listening to solar storms through the ionosphere's radio mirror.