NOAA SEC Space-Weather-Advisory 13 Nov 2001

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

SPACE WEATHER OUTLOOK #01- 46

2001 November 13 at 03:36 p.m. MST (2001 November 13 2236 UT)

**** SPACE WEATHER OUTLOOK ****

Summary For November 5-11

Space weather reached category S4 (severe) and G4 (severe) levels on the
NOAA Space Weather Scales. A category S4 (severe) solar radiation
storm that began on November 4 continued into November 5 and 6. The
storm decreased to S2 (moderate) levels on November 7 and 8 then to S1
(minor) levels on November 9. On November 5, 6:20 p.m. MST (2001 6
November 0150 UT) a coronal mass ejection (CME) arrived at earth and
resulted in a category G4 (Severe) geomagnetic storm on November 6.
Aurora activity was reported as far south as Georgia and Alabama, USA..
Geomagnetic levels decreased to G2 (moderate) levels on November 7.
Radio blackouts reached category R1 (minor) levels on November 5, 6,
9th and the R2 (moderate) levels on November 7-8. For a list of
adverse system effects related to space weather storms, please refer to
the NOAA Space Weather Scales.

Outlook For November 14-20

Space weather is expected to range from minor to moderate levels.
Category R1 (minor) to R2 (moderate) radio blackouts are possible
during the period.

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 or
(303) 497-5127. The NOAA Public Affairs contact is Barbara McGehan
at bmcgehan@boulder.noaa.gov or (303) 497-6288.