Solar Activity Report for 5/21/05
- View Source** G-1 Geomagnetic Storm In Progress **
What a difference a few days makes! From the high activity of last
weekend, we've gone to an almost blank and quiet sun. There is a
single, small sunspot region visible, that being region 765. At the
present time, it doesn't appear to have flare-generating potential.
With no coronal holes in view, we should be seeing quiet conditions
for the next several days. Now, with all of that, you're probably
wondering why a geomagnetic storm is in progress. There really
doesn't appear to be a direct cause of it. The interplanetary
magnetic field did tilt south earlier today, which does have the
effect of enhancing geomagnetic activity, and the solar wind is just
barely fast and dense enough to produce a discernable effect. Expect
to see the storm conditions to diminish overnight.
The current solar and geomagnetic conditions are :
NOAA sunspot number : 37
SFI : 82
A index : 18
K index : 5
Solar wind speed : 437.5 km/sec
Solar wind density : 1.4 protons/cc
Solar wind pressure : 0.4 nPa
IMF : 6.0 nT
IMF Orientation : 0.7 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 very low.
Geomagnetic activity forecast :
The geomagnetic field is expected to be quiet to unsettled with the
possibility of an isolated active period on 22 May. On 23 and 24 May,
quiet to unsettled conditions are expected.
Recent significant solar flare activity :