Solar Activity Report for 9/13/03
- That Earth is exiting the high speed solar wind stream it has been
inside of for the last few days. Other than a short period of G-1
geomagnetic storm conditions that triggered some aurora that were
spotted in Alaska and northern Canada, there wasn't much geomagnetic
activity associated with it due to a persistent north-pointing
Interplanetary Magnetic Field. A north-pointing IMF has the effect of
diminishing geomagnetic activity, whereas a south pointing IMF will
enhance it. There was a long-duration B-class flare on Friday caused
by two disappearing filaments. SOHO LASCO imagery shows a weak,
partial-halo CME being created by the event. While the effect caused
by its arrival shouldn't be particularly pronounced, we could see some
increased geomagnetic activity in 24 to 36 hours. There's another
coronal that has rotated into view. Look for a return of high solar
wind speeds along about the 19th.
The current solar and geomagnetic conditions are :
NOAA sunspot number : 57
SFI : 96
A index : 11
K index : 2
Solar wind speed : 437.5 km/sec
Solar wind density : 2.1 nPa
Solar wind pressure : 0.6 nPa
IMF : 5.5 nT
IMF Orientation : 1.8 nT North
Conditions for the last 24 hours :
No space weather storms were observed for the past 24 hours.
Forecast for the next 24 hours :
No space weather storms are expected for the next 24 hours.
Solar Activity Forecast :
Solar activity is expected to be at very low to low levels. Region 456
has the potential for C-class activity and a slight chance of an
isolated M-class flare.
Geomagnetic Activity Forecast :
The geomagnetic field is expected to be at quiet to unsettled levels
on day one of the forecast period. Weak CME effects are possible on
day two and day three with quiet to active levels expected.
Recent significant solar flare activity :