Weekly Report

(last updated 10 Jul 2025 01:03 UT)

SUBJ: ASWFC WEEKLY GEOPHYSICAL REPORT ISSUED ON 10 JULY 2025 FROM THE AUSTRALIAN SPACE WEATHER FORECASTING CENTRE ASWAS SCALE DESCRIPTION: https://bit.ly/3lmaMBx 1. SUMMARY (01 JULY - 09 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 01 Jul 2211 0001 2 02 Jul 1222 2221 6 03 Jul 2333 3322 12 04 Jul 1221 1133 7 05 Jul 2223 3242 11 06 Jul 3334 3023 13 07 Jul 3322 3322 11 08 Jul 2322 1312 8 09 Jul 2212 2212 6 *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. G1 planetary geomagnetic conditions were observed on 6 and 7-Jul. G0 geomagnetic conditions were observed in the Australian region all week. 2. FORECAST (10 JULY - 09 AUGUST) Disturbed Periods: 12-13 Jul, 15-17 Jul, 22-24 Jul, 31-Jul to 3-Aug Best Quiet Periods: 18-20 Jul, 26-29 Jul 3. FORECAST FOR HIGH RESOLUTION AEROMAGNETIC SURVEYS Northern Australian Regions: Disturbed Periods: None. Best Quiet Periods: 10 Jul to 5 Aug. Central Australian Regions: Disturbed Periods: None. Best Quiet Periods: 18-20 Jul, 26-29 Jul. Southern Australian Regions: Disturbed Periods: 12-13 Jul, 15-17 Jul, 22-24 Jul, 31-Jul to 3-Aug Best Quiet Periods: 18-20 Jul, 26-29 Jul. 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.