Weekly Report
(last updated 25 Feb 2021 00:59 UT)
SUBJ: SWS WEEKLY GEOPHYSICAL REPORT ISSUED ON 25 FEBRUARY 2021, BY Space Weather Services, FROM THE AUSTRALIAN SPACE FORECAST CENTRE 1. SUMMARY (16 FEBRUARY - 24 FEBRUARY) 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 16 Feb 2323 2311 9 17 Feb 2212 2112 5 18 Feb 1111 0001 1 19 Feb 1113 4343 13 20 Feb 3233 3433 15 21 Feb 3244 3212 13 22 Feb 2223 3232 10 23 Feb 2222 3221 7 24 Feb 1323 2342 12 *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 with active periods on 19-21 February due to coronal hole activity and active periods on 24 February due to CME impact. 2. FORECAST (25 FEBRUARY - 27 MARCH) Disturbed Periods: No strong recurrent patterns, however mild activity may be experienced on: 1-2 Mar, 5-6 Mar, 12 Mar, 15 Mar, 18-22 Mar. Best Quiet Periods: 26-28 Feb, 3-4 Mar, 8-11 Mar, 13-14 Mar, 24-27 Mar. 3. FORECAST FOR HIGH RESOLUTION AEROMAGNETIC SURVEYS Northern Australian Regions: Disturbed Periods: None. Best Quiet Periods: 25 Feb - 27 Mar. Central Australian Regions: Mildly Disturbed Periods: 1-2 Mar, 6 Mar, 19-22 Mar. Best Quiet Periods: 26-28 Feb, 3-5 Mar, 7-18 Mar, 23-27 Mar. Southern Australian Regions: Disturbed Periods: 1-2 Mar, 6 Mar, 19-22 Mar. Best Quiet Periods: 26-28 Feb, 3-5 Mar, 7-18 Mar, 23-27 Mar. 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.
