Solar Activity Report for 12/20/03
- The Earth has entered a high speed coronal hole solar wind stream,
although you'll notice the lack of an aurora watch. The reason is
because the interplanetary magnetic field has been holding in a
north-pointing orientation. This reinforces Earth's magnetic field,
and has the effect of diminishing geomagnetic acvtivity. Unless this
changes, which is entirely possible, don't look for much in the way of
aurora. However, the official forecast does call for at least a
chance of minor geomagnetic storm conditions for the next 24 hours.
Of the three numbered sunspot regions visible, regions 525 and 528
have an isolated chance of producing a significant flare.
The current solar and geomagnetic conditions are :
NOAA sunspot number : 104
SFI : 130
A index : 16
K index : 3
Solar wind speed : 548.5 km/sec
Solar wind density : 2.7 protons/cc
Solar wind pressure : 2.1 nPa
IMF : 10.4 nT
IMF Orientation : 5.6 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 :
Space weather for the next 24 hours is expected to be minor.
Geomagnetic storms reaching the G1 level are expected.
Solar activity forecast :
Solar activity is expected to be low to moderate. Regions 525 and 528
(N09E49) are expected to produce C-class flares, and are capable of
producing isolated M-class flares.
Geomagnetic activity forecast :
The geomagnetic field is expected to be quiet to active, with isolated
minor storm conditions on 21-22 December due to persistent effects
from the geoeffective coronal hole.
Recent significant solar flare activity :