Weekly Report
(last updated 03 Apr 2025 00:41 UT)
SUBJ: ASWFC WEEKLY GEOPHYSICAL REPORT ISSUED ON 03 APRIL 2025 FROM THE AUSTRALIAN SPACE WEATHER FORECASTING CENTRE ASWAS SCALE DESCRIPTION: https://bit.ly/3lmaMBx 1. SUMMARY (25 MARCH - 02 APRIL) 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 25 Mar 2223 2353 15 In the BOM magnetometer data for 25 Mar, a weak (8nT) impulse was observed at 2009UT. 26 Mar 3333 4454 23 In the BOM magnetometer data for 26 Mar, a weak (10nT) impulse was observed at 2228UT. 27 Mar 3433 4423 18 28 Mar 2322 2223 9 29 Mar 2221 1102 4 30 Mar 2221 1111 4 31 Mar 1222 1101 4 01 Apr 1120 1022 3 02 Apr 3323 3133 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. Active on 26-27 Mar. Quiet to unsettled on other days. 2. FORECAST (03 APRIL - 03 MAY) Disturbed Periods: 4-5 Apr, 8-9 Apr, 17-18 Apr, 22-23 Apr. Best Quiet Periods: 3 Apr, 11-16 Apr, 25-30 Apr 3. FORECAST FOR HIGH RESOLUTION AEROMAGNETIC SURVEYS Northern Australian Regions: Disturbed Periods: None. Best Quiet Periods: 3 Apr, 11-16 Apr, 24-30 Apr Central Australian Regions: Disturbed Periods: 23 Apr. Mildly Disturbed Periods: 5 Apr, 8-9 Apr, 17-18 Apr, 22-23 Apr Best Quiet Periods: 3 Apr, 11-16 Apr, 25-30 Apr Southern Australian Regions: Disturbed Periods: 4-5 Apr, 8-10 Apr, 15-Apr, 17-18 Apr, 22-24 Apr, 1-2 May Best Quiet Periods: 3 Apr, 12-14 Apr, 16-Apr, 25-28 Apr 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.
