A powerful solar event on Aug 09, 2011
|posted: Aug 09, 2011, 10:45UT|
|A powerful solar event occurred at 08:05 UT today, Aug 09 on the Sun. Email alerts are being sent.|
A strong burst of radiation, a flare, was measured by the GOES satellite. The flare was also seen as a light flash in
PROBA2/SWAP and SDO/AIA images. Solar radiation reaches the Earth after 8 minutes. This flare is up to now the strongest flare of the current solar cycle.|
Shortly after the peak of the flare, the proton flux near Earth increased. GOES is also capable of measuring these energetic electrical particles. The Sun throws a whole bunch of these particles into space, more than usual. The proton flux passed the storm threshold. The storm level is not dramatic.
A plasma cloud left the Sun at the moment of the event. It is now traveling through space at a speed of more than 1000 km/s. At this speed of 1000 km/s and without any deceleration, a cloud bridges the distance between the Sun and the Earth in 1 day and 17 hours. The plasma cloud is not directed straight at Earth. But a glancing blow is possible and can cause a geomagnetic storm.
Possible consequences on the day side of the Earth associated with the radiation burst:
Possible consequences associated with the proton event:
Possible consequences when the the plasma cloud arrives at Earth: