Long Duration Solar Flare & Earth-directed Coronal Mass Ejection
September 9, 2014: Earlier today, the magnetic canopy of sunspot AR2158 erupted, producing an explosion that lasted more than 6 hours. The flare peaked on Sept. 9th at 00:30 UT with a classification of M4 on the Richter Scale of Solar Flares. Long-duration flares tend to produce bright CMEs, and this one was no exception.
Coronagraphs onboard the Solar and Heliospheric Observatory observed a CME racing out of the blast site at nearly 1,000 km/s (2.2 million mph.
Most of the storm cloud is heading north of the sun-Earth line, but not all. A fraction of the CME will deliver a glancing blow to Earth's magnetic field, probably during the late hours of Sept. 11th or early hours of Sept. 12th. In the past few weeks, glancing blows from minor CMEs have sparked beautiful auroras around the Arctic Circle. This CME could do the same.
Image Credit: NASA Solar and Heliospheric Observatory (SOHO)
Caption Credit: SpaceWeather.com #NASA #Space #Sun #Solar #Flare #CME #Coronal #Mass #Ejection #Sunspot #AR2158 #Aurora #Earth