Weekly Report

(last updated 24 Jul 2025 02:12 UT)

SUBJ: ASWFC WEEKLY GEOPHYSICAL REPORT ISSUED ON 24 JULY 2025 FROM THE AUSTRALIAN SPACE WEATHER FORECASTING CENTRE ASWAS SCALE DESCRIPTION: https://bit.ly/3lmaMBx 1. SUMMARY (15 JULY - 23 JULY) 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 15 Jul 3334 2211 11 16 Jul 2324 1123 10 17 Jul 3333 3331 13 18 Jul 1123 3211 7 19 Jul 1222 1211 5 20 Jul 1111 2101 3 21 Jul 1100 0001 1 22 Jul 1202 2233 7 23 Jul 2334 4233 16 *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. G0 in the Australian region throughout the week. 2. FORECAST (24 JULY - 23 AUGUST) Disturbed Periods: 24-26 Jul, 31 Jul to 3 Aug, 10-13 Aug, 18-20 Aug. Best Quiet Periods: 28-30 Jul, 5-6 Aug, 15-17 Aug, 22-23 Aug. 3. FORECAST FOR HIGH RESOLUTION AEROMAGNETIC SURVEYS Northern Australian Regions: Disturbed Periods: None. Best Quiet Periods: 24 Jul to 23 Aug. Central Australian Regions: Disturbed Periods: 24-26 Jul, 3-4 Aug, 9-15 Aug, 19-21 Aug. Best Quiet Periods: 27 Jul to 2 Aug, 6-8 Aug, 17-18 Aug, 23 Aug. Southern Australian Regions: Disturbed Periods: 24-26 Jul, 3-4 Aug, 9-15 Aug, 19-21 Aug. Best Quiet Periods: 27 Jul to 2 Aug, 6-8 Aug, 17-18 Aug, 23 Aug. 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.