Space Weather Advisory 00-12 24 November 2000

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

SPACE WEATHER BULLETIN #00- 12

2000 November 23 at 11:34 p.m. MST (2000 November 24 0634 UT)

**** STRONG RADIO BLACKOUT DETECTED ****

A category R3 (strong) radio blackout occurred on November 23 at 10:02
p.m. MST (2000 November 24 0502 UT) due to a major solar flare. Category
R3 radio blackouts usually result in the following system effects on the sunlit
side of Earth: wide area blackout of high-frequency radio communication
with loss of radio contact for about an hour and low-frequency
navigation signals degraded for about an hour.

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.