lundi 27 octobre 2014
One Giant Sunspot, 6 Substantial Flares
NASA - Solar Dynamics Observatory (SDO) patch.
October 27, 2014
A giant active region on the sun erupted on Oct. 26, 2014, with its sixth substantial flare since Oct. 19. This flare was classified as an X2-class flare and it peaked at 6:56 a.m. EDT. This is the third X-class flare in 48 hours, erupting from the largest active region seen on the sun in 24 years.
Image above: The bright light in the lower right of the sun shows an X-class solar flare on Oct. 26, 2014, as captured by NASA's SDO. This was the third X-class flare in 48 hours, which erupted from the largest active region seen on the sun in 24 years. Image Credit: NASA/SDO.
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.
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.
What is a solar flare?
For answers to this and other space weather questions, please visit the Spaceweather Frequently Asked Questions page: http://www.nasa.gov/mission_pages/sunearth/spaceweather/index.html
What does it take to be X-class?: http://www.nasa.gov/mission_pages/sunearth/news/X-class-flares.html
View Past Solar Activity: http://www.nasa.gov/mission_pages/sunearth/multimedia/Solar-Events.html
For more information about Solar Dynamics Observatory (SDO), visit: http://www.nasa.gov/mission_pages/sdo/main/
Image (mentioned), Text, Credits: NASA's Goddard Space Flight Center / Karen C. Fox.
Publié par Orbiter.ch à 11:13