Official Space Weather Advisory issued by NOAA
Space Environment Center
Boulder, Colorado, USA

SPACE WEATHER ADVISORY BULLETIN #05- 6
2005 August 24 at 10:52 a.m. MDT (2005 August 24
1652 UTC)

**** EXTREME GEOMAGNETIC STORM ****

Forecasters at the NOAA's Space Environment
Center (SEC) in Boulder,
Colo., observed an extreme (G5) geomagnetic
storm, beginning on August
24 at 2:12 a.m. EDT. Solar flares on August 22
produced minor to
moderate radio blackouts (R1 and R2) and a
moderated radiation storm
(S2). Also, two large Earth-directed coronal mass
ejections occurred
on August 22, which resulted in today's extreme
geomagnetic storming.
The most intense period of geomagnetic storming
occurred between 4:00
a.m. and 7:00 a.m. EDT today. The storm is
currently subsiding;
however, further, less intense geomagnetic
storming is expected through
tomorrow.

This solar activity originated from a complex
sunspot cluster known as
NOAA Region 798. Minor to moderated radio
blackouts are still possible
today. The radiation storm currently in progress
is expected to
subside by August 25. This active region is
currently rotating around
the west limb of the Sun and will no longer be
visible from Earth after
today.

Agencies impacted by space weather storms may
experience disruptions
through August 25. These include spacecraft
operations, electric power
systems, HF communications, and navigations
systems.

Data used to provide space weather services are
contributed by NOAA,
USAF, NASA, NSF, USGS, the International Space
Environment Services
and other observatories, universities, and
institutions. More
information is available at SEC's Web site
http://sec.noaa.gov
(Glenn Hauser, dxld yahoo group)

dxAce
Michigan
USA