Powerful Solar Storm Could Impact GPS Dec. 14-15

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

SPACE WEATHER ADVISORY BULLETIN #06- 5
2006 December 14 at 10:04 a.m. MST (2006 December 14 1704 UTC)


**** GEOMAGNETIC STORM IN PROGRESS ****


A geomagnetic storm began on December 14 at 1416 UTC (9:16 A.M. EST). A
solar flare on 13 December at 0240 UTC (12 December, 9:40 P.M. EST)
from NOAA Region 930 produced strong radio blackouts (R3) and an
associated moderate (S2) solar radiation storm. A large Earth-directed
coronal mass ejection was also observed with this event, producing
todayâ??s geomagnetic storming. Strong to severe (G3 â?? G4) geomagnetic
storming is expected to last through 15 December.


Region 930 is a large sunspot group which is still rotating across the
visible disk. Because of the current position of Region 930,
additional activity has greater potential to quickly impact Earth.
Agencies impacted by space weather storms should continue to closely
monitor space weather conditions during the next four days.


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