Solar Activity Report for 4/5/03
- ** Aurora Watch In Effect **
The CME impact mentioned in my last report is still influencing the
geomagnetic conditions. G-1 geomagnetic storm conditions have been
observed within the last 24 hours, and an aurora watch is still in
effect. There have already been a few aurora sightings in northern
Europe, as can be seen here :
http://science.nasa.gov/spaceweather/aurora/gallery_01apr04.htm . The
may be more fun on the way. Just about any time now, the Earth should
encounter a high speed coronal hole solar wind stream. Depending upon
what the interplanetary magnetic field does, activity could reach
major storm level. There has been one significant flare within the
last day, that being an M-1 event from sunspot region 588. Region 588
is a relatively new arrival, and will be in view for several days yet.
Watch this sunspot region, as it has the potential for generating
more M-class flares.
The current solar and geomagnetic conditions are :
NOAA sunspot number : 68
SFI : 109
A index : 22
K index : 4
Solar wind speed : 513.9 km/sec
Solar wind density : 5.2 protons/cc
Solar wind pressure : 2.1 nPa
IMF : 11.5 nT
IMF Orientation : 1.5 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. Radio blackouts reaching the R1
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 at very low to low levels.
Geomagnetic activity forecast :
The geomagnetic field is expected to be at predominantly active levels
for 4-5 April. During the first two days, isolated minor storm
conditions may persist especially in the nighttime sectors, due to the
potential of further transient activity, and the likelihood of a
recurrent co-rotating interaction region. Major storm levels are
expected due to a strong recurrent high speed coronal hole stream that
is due to become geoeffective on 6 April.
Recent significant solar flare activity :
05-Apr-2004 0555Z M1.7