Our sun could produce a catastrophic superflare. But how likely is it?

Researchers spot another similar Milky Way star flashing in a superflare, suggesting that our Sun too could have a superflare. 

The sun releases an M1.7 class flare associated with a prominence eruption on April, 16, 2012. This image was taken by the Solar Dynamics Observatory. This visually spectacular explosion occurred on the sun's Northeastern limb (l.) and was not Earth directed.

Scientists have spotted a superflare, a massive solar flare, on a star quite similar to our sun. And, given the similarities of the stars, they say our sun too could produce such a brilliant and potentially destructive flash.

The properties of the superflare on KIC9655129, the other star, are similar to the sun's smaller solar flares, suggesting the physics causing the flares could be the same, the researchers point out in a paper published this fall in The Astrophysical Journal.

Solar flares generally release energy equivalent to 100 million megaton bombs. A superflare could far top that with an energy equivalent to 100 billion megaton bombs.

"If the Sun were to produce a superflare it would be disastrous for life on Earth; our GPS and radio communication systems could be severely disrupted and there could be large scale power blackouts as a result of strong electrical currents being induced in power grids," study lead author Chloë Pugh said in a news release.

"Fortunately," she said, "the conditions needed for a superflare are extremely unlikely to occur on the Sun, based on previous observations of solar activity."

Still, the flares of other stars could help researchers understand what might be possible in our own solar system.

"Our solar system is filled with plasma, or ionised gas, originating from the Sun as a result of the solar wind and other more violent solar eruptions, such as solar flares," Ms. Pugh explained. "Stars very similar to the Sun have been observed to produce enormous flares, called superflares. To give us a better indication of whether the Sun could produce a catastrophic superflare, we need to determine whether the same physical processes are responsible for both stellar superflares and solar flares."

Solar flares appear as a flash, as a burst of radiation across much of the electromagnetic spectrum. The burst occurs when the Sun's magnetic energy builds up and then suddenly releases, usually from dark sunspots.

Often coronal mass ejections, eruptions of super-heated plasma into space, occur along with the solar flare. It's these ejections that often cause the damage from the solar events, as the charged particles interact with the Earth's magnetic field. This disruption can knock out GPS signals, radio communications and power grids.

In March 1989, just such a solar storm caused electrical blackouts across North America. Most significantly, power grids across the entire province of Quebec were out in what was dubbed The Quebec Blackout.

You've read  of  free articles. Subscribe to continue.

Dear Reader,

About a year ago, I happened upon this statement about the Monitor in the Harvard Business Review – under the charming heading of “do things that don’t interest you”:

“Many things that end up” being meaningful, writes social scientist Joseph Grenny, “have come from conference workshops, articles, or online videos that began as a chore and ended with an insight. My work in Kenya, for example, was heavily influenced by a Christian Science Monitor article I had forced myself to read 10 years earlier. Sometimes, we call things ‘boring’ simply because they lie outside the box we are currently in.”

If you were to come up with a punchline to a joke about the Monitor, that would probably be it. We’re seen as being global, fair, insightful, and perhaps a bit too earnest. We’re the bran muffin of journalism.

But you know what? We change lives. And I’m going to argue that we change lives precisely because we force open that too-small box that most human beings think they live in.

The Monitor is a peculiar little publication that’s hard for the world to figure out. We’re run by a church, but we’re not only for church members and we’re not about converting people. We’re known as being fair even as the world becomes as polarized as at any time since the newspaper’s founding in 1908.

We have a mission beyond circulation, we want to bridge divides. We’re about kicking down the door of thought everywhere and saying, “You are bigger and more capable than you realize. And we can prove it.”

If you’re looking for bran muffin journalism, you can subscribe to the Monitor for $15. You’ll get the Monitor Weekly magazine, the Monitor Daily email, and unlimited access to CSMonitor.com.

QR Code to Our sun could produce a catastrophic superflare. But how likely is it?
Read this article in
QR Code to Subscription page
Start your subscription today