Space Weather Outlook #00-44 10 October 2000
Official Space Weather Advisory issued by NOAA Space Environment Center
Boulder, Colorado, USA
SPACE WEATHER OUTLOOK #00- 44
2000 October 10 at 12:35 p.m. MDT (2000 October 10 1835 UT)
**** SPACE WEATHER OUTLOOK ****
Summary For October 2-8
Space weather reached category 3 (strong) levels. Category G2 (moderate)
to G3 (strong) geomagnetic storm conditions occurred during Oct. 4 – 5
due to CME passages at Earth. Category 3 (strong) geomagnetic storm
conditions are typically associated with some or all of the following
system effects: voltage corrections may be required on power systems
and false alarms may be triggered on protection devices as well;
surface charging may occur on satellite components, drag may increase
on low-Earth orbit satellites, and corrections may be needed for
satellite orientation problems; intermittent satellite navigation and
low-frequency navigation problems may occur; and high-frequency radio
communication may be intermittent. Isolated category R1 (minor) radio
blackouts occurred on Oct. 2 due to moderate-sized solar flares. R1
radio blackouts usually result in the following effects on the sunlit
portion of Earth: minor degradation of high-frequency radio
communication with occasional loss of contact and brief degradation of
low-frequency navigation signals.
Outlook For October 11-17
Space weather is expected to reach moderate (category 2) levels early in
the period. A geomagnetic field disturbance is expected during Oct. 12
– 13 due to CME effects. Category G2 (moderate) geomagnetic storm
conditions are expected to occur during this disturbance. Category G2
geomagnetic storms can result in the following system effects: high
latitude power systems may experience voltage alarms; corrective
actions may be required by ground control for satellite orientation
problems and possible changes in drag affect orbit predictions;
high-frequency propagation can fade at higher latitudes; and aurora is
visible as low as 55 degrees latitude. There will be a chance for
isolated category R1 (minor) radio blackouts sometime during the period
with effects similar to those described in the summary.
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.
