Solar Activity Report for 4/30/05
- View Source** G-1 Geomagnetic Storm In Progress **
**Aurora Watch In Effect **
The arrival of the CME I mentioned in my last report and a high speed
coronal hole solar wind stream have combined to produce G-1
geomagnetic storm conditions. Thusfar, no aurora sightins have been
reported on spaceweather.com, but I wouldn't be surprised if some
aurora pictures show up in a couple of days. The active conditions
are expected to continue for another 24 hours before beginning to
settle down. Sunspot region 756 has grown big enough to be naked eye
visible, and now spans 5 Earth-diamaters. It have at least an outside
chance of generating an M-class flare, although so far, the background
X-ray flux doesn't indicate a high level of activity from what is
easily the largest sunspot region we've seen in awhile.
The current solar and geomnagnetic conditions are :
NOAA sunspot number : 53
SFI : 106
A index : 18
K index : 5
Solar wind speed : 650.4 km/sec
Solar wind density : 1.9 protons/cc
Solar wind pressure : 1.6 nPa
IMF : 8.7 nT
IMF Orientation : 3.4 nT South
GOES-12 Background X-ray Flux level : B1
Conditions for the last 24 hours :
Space weather for the past 24 hours has been minor. Geomagnetic storms
reaching the G1 level occurred.
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 with a chance for an isolated
M-flare from Region 756.
Geomagnetic activity forecast :
The geomagnetic field is expected to be unsettled to active with minor
storm periods possible on 01 May. Conditions are expected to settled
down to quiet to unsettled levels with active periods possible for the
remainder of the period.
Recent significant solar flare activity :