Solar Activity Report for 4/15/03
- ** Aurora Watch In Effect **
Income tax day aurora? It's definitely a possibility tonight as the
solar wind speed is within shouting distance of 700 km/sec, and G-1
geomagnetic storm conditions have been seen within the last 24 hours.
The cause for the activity is a large coronal hole that is now in an
Earth-pointing position. The active geomagnetic conditions are
expected to persist for the next two or three days as the high speed
solar wind continues to impact Earth's magnetosphere. There isn't
much to speak of in the way of sunspot activity right now. Three
small sunspot regions are visible, but none of them appear to have any
flare producing potential for the time being.
The current solar and geomagnetic conditions are :
NOAA sunspot number : 54
SFI : 101
A index : 24
K index : 4
Solar wind speed : 651.4 km/sec
Solar wind density : 3.1 protons/cc
Solar wind pressure : 2.3 nPa
IMF : 9.3 nT
IMF Orientation : 0.4 nT North
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 :
No space weather storms are expected for the next 24 hours.
Solar activity forecast :
Solar activity is expected to be at very low to low levels. Regions
330 and 334 have the potential for C-class activity.
Geomagnetic activity forecast :
The geomagnetic field is expected to be at unsettled to active levels.
A large southern coronal hole has rotated into a geo-effective
position and is expected to produce active conditions over the next
few days. There is a possibility of isolated minor storm conditions
during the period.
Recent significant solar flare activity :