Solar Activity Report for 5/11/03
- ** Aurora Watch In Effect **
G-1 and G-2 geomagnetic storms have been going all weekend, and it
doesn't look like it will calm down for at least another three days.
There have been some great aurora pictures captured, including this
one in Alberta, Canada.
The Earth is still inside a coronal hole solar wind stream, which
is the cause of all the activity. Look for the solar wind speed to
stay in the neighborhood 600 - 700 km/sec, give or take a little. How
much of a geomagnetic storm we get from one hour to the next will
depend largely upon the orientation of the Interplanetary Magnetic
Field. There's still very little to report from the flare and sunspot
department, and the background X-ray flux is quite low, and only two
small sunspot regions are visible tonight.
The current solar and geomagnetic conditions are :
NOAA sunspot number : 47
SFI : 92
A index : 27
K index : 4
Solar wind speed : 649.5 km/sec
Solar wind density : 2.7 protons/cc
Solar wind pressure : 1.9 nPa
IMF : 8.4 nT
IMF Orientation : 0.6 nT South
Conditions for the last 24 hours :
Space weather for the past 24 hours has been moderate. Geomagnetic
storms reaching the G2 level occurred.
Forecast for the next 24 hours :
Space weather for the next 24 hours is expected to be moderate.
Geomagnetic storms reaching the G2 level are expected.
Solar activity forecast :
Solar activity is expected to remain very low.
Geomagnetic activity forecast :
The geomagnetic field is expected to be at unsettled to major storm
levels for the next three days. A significant coronal hole will be in
geoeffective position at the beginning of the period, and is of great
enough extent to continue to impact the earth's magnetic field for
Recent significant solar flare activity :