GEOMAGNETIC STORM UNDERWAY: A moderate G2-class geomagnetic storm is underway following the arrival of a CME on March 12th at ~0930 UT. The CME's impact caused strong ground currents in Norway. At the same time, photographic Southern Lights were recorded over New Zealand and Tasmania. High-latitude sky watchers should be alert for auroras. Aurora alerts: text, phone. - Space Weather.
FILAMENT AND PROMINENCE LIFTOFF: Today we have a very tightly compacted solar filament tube off the southeast limb. Filaments are large regions that contain very dense, cool gas, held in place by the Sun's magnetic field in the Photosphere Region. These Solar Filaments can sometimes last for several days or months. Filaments and Solar Prominences are the same type of event. This type of event is considered a prominence when it is located off the limb of the Sun and appears bright against the darkness of space. It is called a filament when the cooler gas inside makes it appear darker against the background of the Sun. UPDATE: A prominence lifted off in the southeast quadrant and a bright plasma cloud is seen racing away from the Sun. Because of the location, the expanding CME will not be directed towards the Earth.WATCH: Large Prominence on the sun.
INCOMING SHOCK DETECTED / G2 GEOMAGNETIC STORM: ACE detected an incoming shock this morning after 08:00 UTC. The Solar Wind jumped to near 600 km/s and a Geomagnetic Sudden Impulse measuring 96 nT was detected. A G2 Geomagnetic Storm (KP=6) is now in progress. Initially a CME impact was predicted for late tonight. The expanding cloud could have arrived much earlier than expected, or this shock may be unrelated. More information to follow.
ALERT: Geomagnetic K-index of 6
Threshold Reached: 2012 Mar 12 1155 UTC
Synoptic Period: 0900-1200 UTC
Active Warning: Yes
NOAA Scale: G2 - Moderate
SUMMARY: Geomagnetic Sudden Impulse
Observed: 2012 Mar 12 0921 UTC
Deviation: 96 nT
- Solar Ham.