Status Report

NOAA Space Weather Advisory 15 August 2000

By SpaceRef Editor
August 15, 2000
Filed under

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

SPACE WEATHER OUTLOOK #00- 37

2000 August 15 at 01:40 p.m. MDT (2000 August 15 1940 UT)

**** SPACE WEATHER OUTLOOK ****

Summary For August 7-13

A geomagnetic storm reaching G3 (strong) to G4 (severe) levels occurred
during August 11 – 12 as a coronal mass ejection impacted the Earth’s
magnetic field. The G4 conditions were brief and occurred during 12:00
– 3:00 a.m. MDT (0600 – 0900 UTC) on August 12. A storm of this
magnitude is normally associated with some or all of the following
system effects: voltage corrections may be required on power systems
with false alarms triggered on some protective devices; 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 radio navigation problems may occur; and HF radio may be
intermittent. A category S1 (minor) solar radiation storm occurred on
August 11and caused minor impacts on high-frequency radio
communications in the polar regions. Isolated category R1 (minor) radio
blackouts occurred on August 8 and 12 due to moderate-sized solar
flares. R1 radio blackouts typically cause the following effects on the
sunlit portion of Earth: minor degradation of high-frequency radio
communications resulting in occasional loss of radio contact and brief
degradation of low-frequency navigation signals.

Outlook For August 16-22

Space weather is expected to decrease to minor levels. Isolated category
R1 (minor) radio blackouts are expected. No geomagnetic storms or solar
radiation storms are predicted.

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.

SpaceRef staff editor.