• A pair of CMEs on the farside

    A pair of Coronal Mass Ejections are now visible in the latest STEREO Ahead COR2 images. The source of the first CME was located on the farside of the Sun. The second plasma cloud was the result of a filament liftoff near Sunspot 1450. The plasma cloud appears to be

  • Returning Sunspot 1431 produced moderate M1 solar flare

    Old Sunspot 1431 is now rotating back into view off the southeast limb and is also producing solar flares. So far this afternoon it produced a minor C6.5 flare, followed by a moderate M1.0 event at 19:40 UTC. Various small sunspots did form including regions 1441, 1442

  • Farside eruption on Sun’s northwestern limb

    Old sunspot AR1429 is still very active as it transits the far side of the sun. During the early hours of March 18th it produced a spectacular solar flare, blasted away from northwestern limb. Earth will not be affected by the CME cloud.Joint USAF/NOAA Report of

  • Sunspot 1434 unleashed M1.3 solar flare

    Sunspot 1434 located in the southern hemisphere, produced a rapid M1.3 Solar Flare at 20:39 UTC on March 17, 2012. A Type II Sweep Frequency Event with a velocity of 1140 km/s was detected as well. Analysis of the M1.3 flare is ongoing to determine if it was

  • What does a solar storm sound like?

    To get an idea what does a solar storm sound like, a University of Michigan researcher has created a "sonification" of measurements from two spacecraft during the most recent storm. The researcher who created it is Robert Alexander, a University of Michigan de