Extreme Ultraviolet Image of a Significant Solar Flare

You are subscribed to Image of the Day for NASA. This information has recently been updated, and is now available.   Extreme Ultraviolet Image of a Significant Solar Flare 10/20/2014 12:00 PM EDT The sun emitted a significant solar flare on Oct. 19, 2014, peaking at 1:01 a.m. EDT. NASA's Solar Dynamics Observatory, which is always observing the sun, captured this image of the event in extreme ultraviolet wavelength of 131 Angstroms – a wavelength that can see the intense heat of a flare and that is typically colorized in teal. This flare is classified as an X1.1-class flare. X-class denotes the most intense flares, while the number provides more information about its strength. An X2 flare is twice as intense as an X1, and an X3 is three times as intense. 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. > More: NASA's SDO Observes an X-class Solar Flare Image Credit: NASA/Solar Dynamics Observatory   This e-mail update was generated automatically based on your subscriptions. Some updates may belong to more than one category, resulting in duplicate notices.   Questions? Contact Us STAY CONNECTED:     SUBSCRIBER SERVICES: Manage Preferences  |  Unsubscribe  |  Help This message has been sent by NASA Headquarters · Washington, DC 20546