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HomeGeophysicalSummary and ForecastsWeekly Report Monday, Sep 25 2017 20:41 UT
Summary and Forecasts

Weekly Report

(last updated 21 Sep 2017 02:42 UT)

SUBJ: SWS WEEKLY GEOPHYSICAL REPORT ISSUED ON 21 SEPTEMBER 2017, BY Space Weather Services, FROM THE AUSTRALIAN SPACE FORECAST CENTRE 1. SUMMARY (12 SEPTEMBER - 20 SEPTEMBER) K indices are in UT (0-24). For conversion to local time: AEST = UT + 10 hours; ACST = UT + 9.5 hours; AWST = UT + 8 hours Australian Region* Date K-INDICES A 12 Sep 2222 3233 10 In the SWS magnetometer data for 12 Sep, a weak (12nT) impulse was observed at 2005UT. 13 Sep 4343 2110 12 14 Sep 2113 3543 16 In the SWS magnetometer data for 14 Sep, a weak (10nT) impulse was observed at 1117UT. 15 Sep 3353 4343 22 16 Sep 3433 4322 16 17 Sep 2222 4322 10 18 Sep 3243 3212 12 19 Sep 1112 2221 5 20 Sep 2223 3111 7 *estimated from real time data NOTE: Indices may have been generated from data obtained in cooperation with the following organisations: Geoscience Australia, University of Newcastle Space Physics Group, Australian Government Antarctic Division and International Center for Space Weather Science and Education, Japan. Active on 15-16 Sep. Quiet to unsettled on other days. 2. FORECAST (21 SEPTEMBER - 21 OCTOBER) Disturbed Periods: 27-29 Sep, 10-15 Oct. Best Quiet Periods: 21-26 Sep, 5-7 Oct, 18-21 Oct. 3. FORECAST FOR HIGH RESOLUTION AEROMAGNETIC SURVEYS Northern Australian Regions: Disturbed Periods: None. Best Quiet Periods: 21 Sep to 11 Oct, 17-21 Oct. Central Australian Regions: Disturbed Periods: None. Best Quiet Periods: 21 Sep to 11 Oct, 17-21 Oct. Southern Australian Regions: Disturbed Periods: 27-29 Sep, 5-6 Oct, 12-16 Oct. Best Quiet Periods: 21-26 Sep, 1 Oct, 9-11 Oct, 18-21 Oct. Pc3 pulsations are high frequency (10-45 second period) variations of the Earths magnetic field. Daily pc3-indices are the daily sum of 20 minute pc3-indices for that station and have been shown to be well correlated with rejection of high resolution aeromagnetic survey flight-line data. PLEASE NOTE: Geomagnetic activity can frequently be determined by short timescale solar events that cannot be forecast a week in advance, particularly at solar maximum.

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