SDO Recorded X1.9 Category Solar Flare

Active Region 1302 unleashes an X1.9-category solar flare at 5:40 am EDT on September 24, 2011. NASA’s Solar Dynamics Observatory (SDO) recorded the extreme ultraviolet flash in composite wavelengths (211, 193, 171 angstrom). This blast produced a coronal mass ejection (CME) that could deliver a glancing blow to Earth’s magnetic field on September 26. Sunspot 1302 has already produced two X-flares, X1.4 on September 22nd and X1.9 on September 24th. Each of the dark cores in the image from SDO is larger than Earth, and the entire active region stretches more than 100,000 km from end to end. The sunspot’s magnetic field is currently crackling with sub-X-class flares that   could   grow   into larger  eruptions   as  the  sunspot continues  to  turn toward Earth. AR1302 is growing and shows no immediate signs of quieting down.

source:www.nasa.gov