Weekly Report

(last updated 01 May 2025 04:30 UT)

SUBJ: ASWFC WEEKLY GEOPHYSICAL REPORT ISSUED ON 01 MAY 2025 FROM THE AUSTRALIAN SPACE WEATHER FORECASTING CENTRE ASWAS SCALE DESCRIPTION: https://bit.ly/3lmaMBx 1. SUMMARY (22 APRIL - 30 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 22 Apr 2221 1222 6 23 Apr 1212 2111 4 24 Apr 2233 3111 8 25 Apr 1110 0011 1 26 Apr 2112 1111 4 27 Apr 1211 0212 4 28 Apr 2101 0001 2 29 Apr 0222 1111 4 30 Apr 2222 1112 5 *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 (01 MAY - 31 MAY) Disturbed Periods: 5-7 May, 12 May, 18-19 May. Best Quiet Periods: 13 May, 20 May, 22-27 May. 3. FORECAST FOR HIGH RESOLUTION AEROMAGNETIC SURVEYS Northern Australian Regions: Disturbed Periods: None. Best Quiet Periods: 1-27 May. Central Australian Regions: Disturbed Periods: None. Best Quiet Periods: 1-12 May, 14-27 May. Southern Australian Regions: Disturbed Periods: 13 May, 19 May. Best Quiet Periods: 1 May, 5-9 May, 11 May, 14-17 May, 21-27 May. 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.