Weekly Report

(last updated 13 Dec 2018 02:16 UT)

SUBJ: SWS WEEKLY GEOPHYSICAL REPORT ISSUED ON 13 DECEMBER 2018, BY Space Weather Services, FROM THE AUSTRALIAN SPACE FORECAST CENTRE 1. SUMMARY (04 DECEMBER - 12 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 04 Dec 2221 1322 7 05 Dec 2111 2011 3 06 Dec 1111 2102 3 07 Dec 2232 2222 8 08 Dec 2232 2322 9 09 Dec 2211 2222 6 10 Dec 2233 2211 8 11 Dec 1222 1222 6 12 Dec 1111 1011 2 *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. Quiet to unsettled conditions. 2. FORECAST (13 DECEMBER - 12 JANUARY) Disturbed Periods: No strong recurrent patterns, however mild activity may be experienced on: 15-17 Dec, 28-30 Dec, 3-6 Jan, 11-12 Jan Best Quiet Periods: 13-14 Dec, 18-27 Dec, 1-2 Jan, 8-10 Jan. 3. FORECAST FOR HIGH RESOLUTION AEROMAGNETIC SURVEYS Northern Australian Regions: No disturbed periods expected. Central Australian Regions: Disturbed Periods: None. Mildly Disturbed Periods: 4-7 Jan. Best Quiet Periods: 13 Dec to 2 Jan, 8-12 Jan. Southern Australian Regions: Disturbed Periods: 4-7 Jan. Best Quiet Periods: 13 Dec to 2 Jan, 8-12 Jan. 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.