Solar Activity Report for 7/22/02
- ** S-1 Solar Radiation Storn In Progress **
** Aurora Watch In Effect **
There's a new sunspot region on the scene, and is it ever starting out
with a bang! Sunspot region 39, which has just rotated into view over
the southeastern limb of the solar disk, fired off a powerful X-4
class flare Monday evening, which triggered a solar radiation storm.
This is the strongest flare that has been observed for quite awhile.
The event also hurled a big CME into space. While it wasn't squarely
Earth-directed due to the sunspot's current position, we could receive
a glancing blow from it. If that happens, it should be sometime
Wednesday. Meanwhile, geomagnetic activity has already been elevated
due to previous flare and coronal hole activity. This has produced
some beautiful aurora displays over the higher latitudes the last
couple of nights. In fact, the last three significant flares in a row
have been X-class flares. Moderate to high solar actiivity will be
the rule over the next few days, with three different sunspot regions
having flare-producing capability.
The current solar geomegnetic conditions are :
NOAA sunspot number : 176
SFI : 190
A index : 15
K index : 3
Solar wind speed : 490.8 km/sec
Solar wind density : 3.9 protons/cc
Solar wind pressure : 1.6 nPa
IMF : 5.1 nT
IMF Orientation : 4.5 nT South
Conditions for the last 24 hours :
Space weather for the past 24 hours has been strong. Geomagnetic
storms reaching the G1 level occurred. Solar radiation storms reaching
the S1 level occurred. Radio blackouts reaching the R3 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 be moderate. Regions 30, 36, and 39 are
all possible sites for an isolated event.
Geomagnetic activity forecast :
The geomagnetic field is expected to be unsettled for the next three
Recent significant solar flare activity :
23-Jul-2002 0035Z X4.8