Intense solar storm bombarding Earth now
Northern lights display could be amplified; no risk expected to power systems
An X1.4 class flare erupted from the center
of the sun, peaking on July 12, 2012 at 12:52 PM EDT. It erupted from
Active Region 1520 which rotated into view on July 6.
A strong solar storm is battering the Earth now and could amplify the planet's northern lights displays.
The solar storm is cosmic fallout from a massive solar flare on Thursday that included a powerful
eruption on the sun, known as a coronal mass ejection. The eruption
sent a wave of charged solar plasma toward Earth, which was expected to
arrive sometime between 5 a.m. and 9 a.m. EDT (0900 and 1400 GMT),
according to forecasts by NASA and the NOAA-run Space Weather Prediction
Center. Space Weather officials said the solar storm could trigger a level G2 geomagnetic storm on Earth, a moderate-level event that could spark auroras at latitudes as low as New York or Idaho, after 9 a.m. EDT. Most northern lights displays, which occur when charged solar particle interact with Earth's upper atmosphere, are confined to high-latitude regions around the polar regions by the planet's magnetic field.
This weekend's solar storm originated from one of the most powerful sun flares to occur this year. The flare registered as an X1.4-class sun storm, one of the strongest flares the sun can unleash. It marked the sixth X-class solar flare of 2012.
The solar storm erupted from the giant sunspot AR1520, or Active Region 1520, which is actually a group of sunspots that at its peak may have stretched across 186,000 miles of the sun's surface, NASA scientists have said.
The Space Weather Prediction Center is keeping a close watch on AR1520, as well as several other active spots on the sun, for signs of more activity.
"All eyes are on the solar wind data to note the expected passage on Saturday of a Coronal Mass Ejection (CME) from Thursday's solar event," center officials wrote in an update late Friday.
The solar storm is not expected to pose a major risk to satellites and spacecraft in orbit, or power systems on Earth, officials have said.
The sun is currently in the middle of an active phase in its 11-year sunspot cycle. The current cycle is known as Solar Cycle 24 and expected to peak in 2013.
Editor's note: If you snap a photo of sunspot AR1520 or any amazing northern lights photos and you'd like to share them for a possible story or image gallery, please send images and comments to managing editor Tariq Malik at tmalik@space.com.
Follow SPACE.com on Twitter @Spacedotcom. We're also on Facebook and Google+.
- Cosmic cat's paw revisitedScience editor Alan Boyle's blog: The pawprint of a cosmic cat comes into sharper focus in this week's featured picture from the European Southern Observatory.
Solar storm should supercharge auroras
'Big Bang Theory' fan wins ride into space
Saturn's rings shine in amazing photos
Photos: Solar Flares From Giant Sunspot AR1520
SDO Combined Views of the Solar Flare on July 12, 2012 Credit: NASA/SDO/AIA/HMIThis image combines two sets of observations of the sun at 10:45 AM EDT, July 12, 2012 from the Solar Dynamics Observatory (SDO) to give an impression of what the sun looked like shortly before it unleashed an X-class flare beginning at 12:11 PM EDT.
Sunspots AR 1519, AR 1520 and AR 1521Credit: NASA/SDO/HMIThis image taken by the Solar Dynamics Observatory's HMI instrument shows sunspot 1520 and it's regional neighbors, 1519 and 1520. Earth is shown to scale.
Sunspot AR 1520 CloseupCredit: © Alan Friedman/avertedimagination.comSky watcher Alan Friedman took this photo of sunspot AR 1520 on July 11, 2012
No comments:
Post a Comment