[image-110]UPDATE: Two coronal mass ejections, or CMEs, also exploded off the sun from the same active region as the Sept. 10, X-class flare. Images of the CMEs were captured by the joint European Space Agency and NASA's Solar and Heliospheric Observatory and NASA's Solar and Terrestrial Relations Observatory. Scientists use observations like these to determine the speed, strength, and size of CMEs.
A Significant Flare Surges Off the Sun September 10, 2014
The sun emitted a significant solar flare, peaking at 1:48 p.m. EDT on Sept. 10, 2014. NASA's Solar Dynamics Observatory captured images of the event. Solar flares are powerful bursts of radiation. Harmful radiation from a flare cannot pass through Earth's atmosphere to physically affect humans on the ground. However -- when intense enough -- they can disturb the atmosphere in the layer where GPS and communications signals travel.
[image-51]To see how this event may affect Earth, please visit NOAA's Space Weather Prediction Center at http://spaceweather.gov, the U.S. government's official source for space weather forecasts, alerts, watches and warnings.
This flare is classified as an X1.6 class flare. "X-class" denotes the most intense flares, while the number provides more information about its strength. An X2 is twice as intense as an X1, an X3 is three times as intense, etc.
Updates will be provided as needed.
What is a solar flare?
For answers to this and other space weather questions, please visit the Spaceweather Frequently Asked Questions page.