An X1.4-class solar flare erupted from giant sunspot group 1520 today (July 12, 2012). The blast began at 16:11 UTC, with the X ray flux peaking at at 16:53 UTC (11:53 CDT), at a time when the sunspot was directly facing Earth. Space weather forecasters say the effects from the coronal mass ejection (CME) created in the event will arrive July 14. It might mean we will see auroras – also called the northern lights – at lower latitudes than usual.
The huge sunspot grouping that produced the flare is as wide across as 10 planet Earths. It emerged in the past week over the sun’s southeastern edge. Tony Phillips, who masterfully pens the website spaceweather.com, said earlier today that AR1520 had been relatively quiet for 48 hours, calling it the calm before the storm. He was right!
We’ve had a number of great photos from EarthSky Facebook friends of this giant sunspot grouping. VegaStar Carpentier caught this beautiful photo of 1520 at sunset on July 7, in Paris. Read more about this photo on VegaStar’s Flickr page.
Here’s another one, taken three days later. This one is from Jv Noriega in the Philippines.
When an X-flare occurs, it may send high energy solar particles toward Earth, which cause the geomagnetic field surrounding our planet to become unsettled. What does an active geomagnetic field mean for us on Earth’s surface? Before the days of our electronic technology, not much. Today, though, satellites in orbit can undergo damaging effects. Telecommunications on Earth can be affected. Our human bodies are protected by Earth’s atmosphere; we’ve evolved for millions of years under the influence of X-flares on the sun and their effects.
Bottom line: AR1520 emerged in the past week over the sun’s southeastern edge. On July 12, 2012, it emitted an X-flare which peaked in intensity at 16:53 UTC (11:53 CDT). A coronal mass ejection or CME was associated with this strong flare whose effects will arrive in Earth’s vicinity on July 14. Experts say we might see auroras at lower latitudes than usual.
Deborah Byrd created the EarthSky radio series in 1991 and founded EarthSky.org in 1994. Today, she serves as Editor-in-Chief of this website. She has won a galaxy of awards from the broadcasting and science communities, including having an asteroid named 3505 Byrd in her honor. A science communicator and educator since 1976, Byrd believes in science as a force for good in the world and a vital tool for the 21st century. "Being an EarthSky editor is like hosting a big global party for cool nature-lovers," she says.