Status Report

Space Weather Outlook #00-43

By SpaceRef Editor
October 3, 2000
Filed under

2000 October 03 at 02:30 p.m. MDT (2000 October 03 2030 UT)


Summary For September 25-October 1

Space weather reached strong levels during the week. A category R3 (strong) radio blackout occurred at 5:21 p.m. MDT (2321 UTC) on September 30 due to a large solar flare from the Sun’s west limb. Category R3 radio blackouts typically cause the following system effects on the sunlit portion of Earth: wide area blackout of high-frequency radio communication resulting in loss of radio contact for about an hour and low-frequency navigation signals degraded for about an hour. A category R2 (moderate) radio blackout was observed at 1:01 a.m. (0701 UTC) on October 1, also from the Sun’s west limb. A category G2 (moderate) geomagnetic storm occurred during 12:00 a.m. – 6:00 a.m. (0600 – 1200 UTC) on September 30 due to a CME passage at Earth. Category G2 geomagnetic storms are normally associated with the following system effects: high-latitude power systems may experience voltage alarms, high-frequency radio communication signals may fade at higher latitudes, satellite orientation may require corrective actions by ground controllers, and possible changes in drag affect satellite orbit predictions.

Outlook For October 4-10

Space weather is expected to be at mostly minor levels. Isolated category R1 (minor) radio blackouts are expected. Should an R1 blackout occur, expect the following system effects on the sunlit portion of Earth: minor degradation of high-frequency radio communication signals and brief degradation of low-frequency navigation signals. Category G1 (minor) geomagnetic storm conditions are possible on October 4 – 5 with minor impacts expected on power systems and satellite operations.

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 or (303) 497-5127. The NOAA Public Affairs contact is Barbara McGehan at or (303) 497-6288.

SpaceRef staff editor.