SPACE WEATHER ADVISORY OUTLOOK #06- 51

2006 December 19 at 01:26 p.m. MST (2006 December 19 2026 UTC)

**** SPACE WEATHER OUTLOOK ****

Summary For December 11-17

The following activity, all associated with major flare activity from NOAA Sunspot Region 930, occurred during the update period:

Geomagnetic storms - Category G1 (minor) on 11-12 Dec; G2 (moderate), G3 (strong), and G4 (severe) on 14-15 Dec.

Solar radiation storms - Category S1 (minor) on 11-12 Dec; S2 (moderate) on 13-15 Dec.

Radio blackouts - Category R3 (strong) on 13-14 Dec.

Outlook For December 20-26

Category G1 (minor) on 20 and 22 December and G2 (moderate) on 21 December geomagnetic storms are expected due to a coronal hole high speed wind stream.

http://www.sec.noaa.gov/SWN/

http://www.sec.noaa.gov/alerts/

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