Solar Activity Report for 9/17/05
- Well, we had aurora in Arizona, severe geomagnetic storms, and more
big flares than you can shake a satellite at, but it appears that
sunspot region 808 is losing some of its punch as it approaches the
western limb. That's not to say, however, that it's going quietly,
and it fired off a flare today that was just barely shy of X-class at
M9.8. Given that it is decaying, albeit slowly, it shouldn't be as
energetic as it is now if it survives for another trip around. Once
region 808 clears, look for the overall activity level to drop
dramatically. It is the only sunspot region visible, and at least for
now, there isn't another one coming into view.
The current solar and goemagnetic conditions are :
NOAA sunspot number : 59
SFI : 104
A index : 11
K index : 2
Solar wind speed : 578.2 km/sec
Solar wind density : 1.1 protons/cc
Solar wind pressure : 0.5 nPa
IMF : 4.4 nT
IMF Orientation : 2.6 nT South
GOES-12 Background X-ray Flux Level : B3
Conditions for the last 24 hours :
Space weather for the past 24 hours has been moderate. Radio blackouts
reaching the R2 level occurred.
Forecast for the next 24 hours :
Space weather for the next 24 hours is expected to be moderate. Radio
blackouts reaching the R2 level are expected.
Solar activity forecast :
Solar activity is expected to be moderate to high. Region 808, though
decaying, is still capable of energetic activity.
Geomagnetic activity forecast :
The geomagnetic field is expected to be unsettled for the next three days.
Recent significant solar flare activity :
7-Sep-2005 0605Z M9.8
16-Sep-2005 1936Z M3.5
16-Sep-2005 1748Z M1.3
16-Sep-2005 0149Z M4.4
15-Sep-2005 1910Z M1.0
15-Sep-2005 0838Z X1.1
15-Sep-2005 0212Z M1.3