Solar Activity Report for 5/26/05
- Although conditions are quiet for the moment, there are things in the
works that will serve to elevate the activity level soon. First of
all, a coronal hole has rotated into an Earth-pointing position. We
should begin to see some solar wind gusts from it beginning sometime
tomorrow. Earlier today, a long-duration C-class flare was observed
from sunspot region 767. A filament eruption accompanied this event,
along with a faint full-halo CME. Look for the CME to arrive here at
Earth on the 29th. Lastly, old sunspot region 758, which generated
M-class flares on it's last trip by, has held together during its
transition across the back side of the sun, and will soon be rotating
into view again.
The current solar and geomagnetic conditions are :
NOAA sunspot number : 72
SFI : 90
A index : 2
K index : 1
Solar wind speed : 301.1 km/sec
Solar wind density : 2.1 protons/cc
Solar wind pressure : 0.4 nPa
IMF : 2.8 nT
IMF Orientation : 1.6 nT North
GOES-12 Background X-ray Flux level : A9
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 low. Region 767 has the potential for
C-class activity with a small chance for an M-class flare. Old Region
758 (S10, L=139), which produced three M-flares on its last rotation,
is expected to rotate onto the visible disk on 28 May.
Geomagnetic activity forecast :
The geomagnetic field is expected to be quiet to unsettled with
occasional active periods on 27 and 28 May due to the effects of a
coronal hole high speed stream. The full halo CME from 26 May is
expected to cause active to minor storm conditions on 29 May.
Recent signigicant solar flare activity :