Soler Activity Report for 1/20/03
- The solar wind speed has surpassed the 700 km/sec mark as a pair of
coronal holes make their effects known. The solar wind we are
experiencing now is from a coronal hole that has now passed its
Earth-pointing position. Interestingly enough, this coronal hole,
which was located mainly in the southern hemisphere of the sun, wasn't
expected to have much effect. On the contrary, the solar wind speed
has increased quite a bit, and G-1 geomagnetic storm conditions have
been observed within the last 24 hours. There's another coronal hole
right on the heels of the one that just passed. The solar wind speed
should remain elevated for several more days, and more geomagnetic
activity is possibility. Although there hasn't been a formal aurora
watch issued, there is a chance for some aurora in the higher
latitudes. There a few small sunspot regions visible, but none appear
to have any flare generating potential at this time.
The current solar and geomagnetic conditions are :
NOAA sunspot number : 184
SFI : 138
A index : 16
K index : 3
Solar wind speed : 705.5 km/sec
Solar wind density : 1.6 protons/cc
Solar wind pressure : n/a
IMF : 9.2 nT
IMF Orientation : 1.4 nT South
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 low levels.
Geomagnetic activity forecast :
The geomagnetic field is expected to be at quiet to active conditions
for day one of the period as the favorably positioned coronal hole
wanes. Day two should see a return to predominantly unsettled
conditions. By day three a transequatorial recurrent coronal hole
should become geoeffective producing active to minor storm levels at
both middle and high latitudes.
Recent significant solar flare activity :