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27 November 2011

Spaceweather: Radiation Storm and CME Alert

A solar radiation storm is in progress around Earth. At the moment, the storm is classified as minor, which means it has little effect on Earth other than to disturb HF radio transmissions at high latitudes. Energetic protons, which make up the bulk of the storm, were accelerated in our direction earlier today by shock waves in a CME racing away from the sun at about 1000 km/s (2.2 million mph). According to analysts at the Goddard Space Weather Lab, the CME itself will reach Earth on Nov. 28th around 14:23 UT (+/- 7 hours). Click to view an animated forecast track:


Animated Images available HERE.

The cloud could triggger geomagnetic storms when it arrives on Monday. High-latitude sky watchers should be alert for auroras. Aurora alerts: text, phone.
The forecasting group at Goddard notes that no two spacecraft have yet beamed back concurrent images of the CME. This makes their estimates of the CME's speed and direction necessarily approximate. Stay tuned for updates as more data arrive. 

- Spaceweather.com