http://science.nasa.gov/science-news/science-at-nasa/2012/22mar_saber/
A surge of infrared radiation from nitric oxide molecules on March 8-10, 2012, signals the biggest upper-atmospheric heating event in seven years.
SOLAR STORM HEATS UP EARTH'S ATMOSPHERE: A flurry of solar activity in early March dumped enough heat in Earth's upper atmosphere to power every residence in New York City for two years. The heat has since dissipated, but there's more to come as the solar cycle intensifies. NOAA forecasters estimate a 15% chance of polar geomagnetic storms on March 23nd. Considering the season, however, a full-fledged storm might not be necessary. Solar wind speed: 362.9 km/sec
Did the crash of Comet Swan trigger a CME on the Sun?