Solar Activity Report for 7/19/03
- ** Aurora Watch In Effect **
With short nights and long days in the northern hemisphere, you
usually don't think of the summer months as a good aurora-watching
period of time. This summer, however, has been an exception. With a
steady procession of coronal holes, plus some occasional good flares,
this summer has been good. Tonight may continue the trend, as the
solar wind speed is within shouting distance of 700 km/sec due to
coronal hole effects, although it is pretty tenous at less about one
proton/cc. Nevertheless, an aurora watch remains in effect, and G-1
geomagnetic storm conditions have been observed within the last 24
hours. There haven't been any significant flares within the last 24
hours, although the background X-ray flux has been steadily rising.
Sunspot region has grown fast, and looks to be a potential source for
some M-class flares.
The current solar and geomagnetic conditions are :
NOAA sunspot number : 178
SFI : 146
A index : 27
K index : 4
Solar wind speed : 660.1 km/sec
Solar wind density : 1.2 protons/cc
Solar wind pressure : 0.7 nPa
IMF : 6.8 nT
IMF Orientation : 4.5 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 :
Space weather for the next 24 hours is expected to be minor. Radio
blackouts reaching the R1 level are expected.
Solar activity forecast :
Solar activity is expected to be low to moderate. There is a good
chance for M-class activity from Regions 410 and 412.
Geomagnetic activity forecast :
The geomagnetic field is expected to continue at mostly unsettled to
active periods through day one with isolated minor storm periods
possible. Quiet to unsettled levels are expected on days two and three
with isolated active periods likely.
Recent significant solar flare activity :