This Sound Wave Trick Reveals Dangerous Solar Flares Before They Hit Earth #shorts #astronomy #nasa

追加: 2026-05-17

[00:00:00]Every 28 days the sun rotates all the way around, which means anything happening on the side we can't see from Earth, sunspots, flares, eruptions, has historically been a mystery until it swings into view. And by that point, you might only have days of warning before whatever's brewing rotates directly toward Earth. Exactly. Now, scientists have had a technique called helioseismology for about 25 years.

[00:00:26]Basically using sound waves reverberating inside the sun to locate where large active regions are forming on that hidden side. So, a bit like using sonar to look for things you can't directly see. Great analogy, but here's the thing. That technique could tell you that something was there. What it could not tell you was the polarity of those active regions. So, polarity matters because Because the polarity of a sunspot group, which way the magnetic field is pointing, is one of the most important factors in how powerful an eruption might be. Get the polarity wrong and your forecast is basically useless. So, what's changed? A team led by solar physicist Omar Hamada at the National Solar Observatory have developed a new method using data from NOAA's Global Oscillation Network Group, GONG, a network of robotic telescopes stationed around the world that continuously records the sun's surface oscillations. They found a way to analyze phase shifts in the helioseismic maps and assign actual magnetic polarities to far-side sunspot regions.

[00:01:32]So, we're not just seeing where the sunspot is, we're now getting information about how dangerous it might be before it's even visible. And to put a very real-world spin on this, just 2 days ago on May 7th, a significant solar flare erupted from the sun's far side.

[00:01:48]The event was partially blocked by the solar horizon, so we don't even know how large it really was. The question already being asked is what's coming back around. That's genuinely exciting and a little unnerving.

[00:02:01]The team's results have been published in Scientific Reports and the findings are being hailed as a breakthrough for full sun magnetic mapping. The more we can see the whole sun at once, the better we can protect the satellites, power grids, and astronauts that rely on space weather forecasting. Massive step forward.