Solar Activity Report for 7/28/05
- ** S-1 Solar Radiation Storm In Progress **
Sunspot region 786 has returned in the form of sunspot region 792, and
it is still as active as it was last time around. Last time by, it
was the source of a massive X-class flare. While we haven't seen any
X-class events yet, it has launched three M-class flares, one being a
very respectable X4.8 flare. This sunspot region will definitely bear
watching as it rotates closer to an Earth-pointing position.
Meanwhile, the Earth has entered a high speed solar wind stream coming
from a coronal hole. G-1 geomagnetic storm conditions have been
observed within the last 24 hours, although there haven't been any
reports of aurora yet.
The current solar and geomagnetic conditions are :
NOAA sunspot number : 29
SFI : 96
A index : 22
K index : 3
Solar wind speed : 613.8 km/sec
Solar wind density : 2.3 protons/cc
Solar wind pressure : 1.5 nPa
IMF : 7.9 nT
IMF Orientation : 0.5 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. Solar radiation storms reaching the S1
level occurred. Radio blackouts reaching the R1 level occurred.
Forecast for the next 24 hours :
Space weather for the next 24 hours is expected to be minor. Solar
radiation storms reaching the S1 level are expected. Radio blackouts
reaching the R1 level are expected.
Solar activity forecast :
Solar activity is expected to moderate with Region 792 as the dominant
source of activity. There is also a slight chance for major flare
activity from this group.
Geomagnetic activity forecast :
The geomagnetic field is expected to be mostly unsettled with a chance
for some active periods for 29 July. Conditions are expected to
decline to predominantly unsettled for 30 July and should be quiet to
unsettled for 31 July. The greater than 10 MeV proton event is
expected to end sometime on 29 July, provided that no new particles
are accelerated by new activity from Region 792.
Recent significant solar flare activity :
28-Jul-2005 2208Z M4.8
28-Jul-2005 0030Z M1.0
27-Jul-2005 0502Z M3.7