Solar Activity Report for 8/26/02
- The solar radiation storm triggered by the X3.1 flare of 8/24 has
subsided. At its peak, it reached the S-3 (strong) category. A CME
from that flare dealt Earth-s magnetosphere a glancing blow on Monday.
While it didn't cause any aurora to speak of, it did set off a brief
G-1 class geomagnmetic storm. Sunspot region 69, which has caused all
of the activity over the last week, has rotated out of view for now.
However, large sunspot groups sometimes hold together for extended
periods time, and we may see sunspot region 69 again around 9/7.
Speaking of sunspots, sunspt region 83 has been somewhat active,
producing 2 M-class flares over the last 24 hours. A coronal hole is
beginning to rotate into view over the southeastern limb of the solar
disk, and could be a factor next week.
The current solar and geomagnetic conditions are :
NOAA sunspot number : 105
SFI : 169
A index : 21
K index : 3
Solar wind speed : 386.3 km/sec
Solar wind density : 4.7 protons/cc
Solar wind pressure : 1.8 nPa
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.
Geomagnetic activity forecast :
The geomagnetic field is expected to be unsettled to active becoming
quiet to unsettled over the next 24 hours.
Recent significant solar flare activity :
26-Aug-2002 0103Z M1.8
25-Aug-2002 1853Z M1.1