Solar Activity Report for 9/3/03
- The current coronal hole encounter has been something of a non-event.
The solar wind speed peaked at about 550 km/sec, and has been holding
in the low 500's for the last 48 hours. I had expected to see a
stronger spike in the solar wind speed, but apparently not this time
around. A persistent north-pointing Interplanetary Magnetic Field
(IMF) has served to keep down any significant geomagnetic activity.
Such as it is, the elevated solar wind speed is expected to continue
for about the next two days before slowing down. None of the four
numbered sunspot regions visible appear to have the potential for
producing a significant flare at the present time.
The current solar and geomagnetic conditions are :
NOAA sunspot number : 74
SFI : 111
A index : 19
K index : 3
Solar wind speed : 531.1 km/sec
Solar wind density : 3.6 protons/cc
Solar wind pressure : 1.6 nPa
IMF : 9.6 nT
IMF Orientation : 5.4 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 very low to low, with C-class flares
possible from Region 450 (S16W07).
Geomagnetic activity forecast :
The geomagnetic field is expected to be quiet to active. Isolated
minor storm conditions days one and two are possible from a high speed
solar wind stream.
Recent significant solar flare activity :