Weekly Report

(last updated 27 Feb 2020 03:02 UT)

SUBJ: SWS WEEKLY GEOPHYSICAL REPORT ISSUED ON 27 FEBRUARY 2020, BY Space Weather Services, FROM THE AUSTRALIAN SPACE FORECAST CENTRE 1. SUMMARY (18 FEBRUARY - 26 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 18 Feb 1222 3333 10 A weak (7nT) impulse was observed at 1347UT in the SWS magnetometer data for 18 Feb. 19 Feb 2324 2211 9 20 Feb 1203 2222 6 21 Feb 2233 2322 10 22 Feb 2112 3321 7 23 Feb 1010 1222 3 24 Feb 1100 1002 2 25 Feb 1000 1001 1 26 Feb 1110 1121 3 *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 (27 FEBRUARY - 28 MARCH) Disturbed Periods: No strong recurrent patterns, however mild activity may be experienced on: 28 Feb, 4-5 Mar, 16-17 Mar, 19-20 Mar. Best Quiet Periods: 1-3 Mar, 6-14 Mar, 18 Mar, 21-23 Mar, 25-28 Mar. 3. FORECAST FOR HIGH RESOLUTION AEROMAGNETIC SURVEYS Northern Australian Regions: Best Quiet Periods: 27 Feb-28 Mar. Central Australian Regions: Best Quiet Periods: 27 Feb-4 Mar, 07-28 Mar. Mildly Disturbed Periods: 5-6 Mar. Southern Australian Regions: Best Quiet Periods: 27 Feb-4 Mar, 7-28 Mar. Disturbed Periods: 5-6 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.