Solar flare produces energetic particle storm

Solar flare produces energetic
    particle storm

. A powerful solar flare (left), occurring at 10 hours 24 minutes Universal Time on Bastille day 14 July 2000, unleashed high-energy protons that began striking the SOHO spacecraft near Earth about 8 minutes later, continuing for many hours, as shown in the image taken on 22 hours 43 minutes Universal Time on the same day (right). Both images were taken at a wavelength of 19.5 nanometers, emitted at the Sun by eleven times ionized iron, denoted Fe XII, at a temperature of about 1.5 million kelvin, using the Extreme Ultraviolet Imaging Telescope, abbreviated EIT, on the SOlar and Heliospheric Observatory, or SOHO for short. (Courtesy of the SOHO EIT consortium. SOHO is a project of international cooperation between ESA and NASA.)

Copyright 2010, Professor Kenneth R. Lang, Tufts University