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HomeGeophysicalSummary and ForecastsWeekly Report Tuesday, Dec 12 2017 23:30 UT
Summary and Forecasts

Weekly Report

(last updated 07 Dec 2017 02:47 UT)

SUBJ: SWS WEEKLY GEOPHYSICAL REPORT ISSUED ON 07 DECEMBER 2017, BY Space Weather Services, FROM THE AUSTRALIAN SPACE FORECAST CENTRE 1. SUMMARY (28 NOVEMBER - 06 DECEMBER) 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 28 Nov 2212 3122 7 29 Nov 2120 1212 4 30 Nov 2312 3312 9 01 Dec 2211 2221 5 02 Dec 1111 1311 4 03 Dec 0000 0001 0 04 Dec 1121 3333 9 In the SWS magnetometer data for 04 Dec, a weak (11nT) impulse was observed at 1614UT. 05 Dec 3334 5333 20 06 Dec 2322 2222 8 *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 with isolated minor storm periods on 5 Dec. Quiet to active on 6 Dec. Quiet to unsettled on other days. 2. FORECAST (07 DECEMBER - 06 JANUARY) Disturbed Periods: 18 Dec, 1-2 Jan. Best Quiet Periods: 8-10 Dec, 14-17 Dec, 22-26 Dec, 28-30 Dec. 3. FORECAST FOR HIGH RESOLUTION AEROMAGNETIC SURVEYS Northern Australian Regions: All days quiet. No disturbed period. Central Australian Regions: Quiet periods: 7 Dec, 9-17 Dec, 20-31 Dec, 3 Jan Mildly disturbed periods: 8 Dec, 18-19 Dec Southern Australian Regions: Quiet periods: 7 Dec, 9-17 Dec, 20-31 Dec, 3 Jan Disturbed periods: 8 Dec, 18-19 Dec 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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