Weekly Report

(last updated 02 Jul 2026 03:15 UT)

SUBJ: ASWFC WEEKLY GEOPHYSICAL REPORT ISSUED ON 02 JULY 2026 FROM THE AUSTRALIAN SPACE WEATHER FORECASTING CENTRE ASWAS SCALE DESCRIPTION: https://bit.ly/3lmaMBx 1. SUMMARY (23 JUNE - 01 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 23 Jun 0001 2120 2 24 Jun 2122 3433 12 25 Jun 4432 4222 15 26 Jun 2221 2332 8 27 Jun 2210 1001 2 28 Jun 1211 0000 2 29 Jun 1100 0000 0 30 Jun 0104 3332 10 In the BOM magnetometer data for 30 Jun, a weak (15nT) impulse was observed at 1151UT. 01 Jul 4421 3221 12 In the BOM magnetometer data for 01 Jul, a weak (11nT) impulse was observed at 1441UT. *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 conditions were reported in the Australian region throughout the entire week. Local G1 conditions were observed at Learmonth on 30-Jun, and also observed early on 01-July at Darwin, Townsville, Learmonth, and Alice Springs. 2. FORECAST (02 JULY - 01 AUGUST) Disturbed Periods: 03-04 Jul, 08-10 Jul, 21-23 Jul Best Quiet Periods: 06-07 Jul, 12-19 Jul, 25-26 Jul. 3. FORECAST FOR HIGH RESOLUTION AEROMAGNETIC SURVEYS Northern Australian Regions: Mildly Disturbed Periods: 03-04 Jul. Best Quiet Periods: 02-Jul, 05-Jul to 01-Aug Central Australian Regions: Disturbed Periods: 03-04 Jul. Mildly Disturbed Periods: 09-10 Jul, 23-24 Jul Best Quiet Periods: 02-Jul, 05-08 Jul, 11-20 Jul, 25-Jul to 01-Aug. Southern Australian Regions: Disturbed Periods: 03-04 Jul, 09-10 Jul, 23-24 Jul Best Quiet Periods: 02-Jul, 05-08 Jul, 11-20 Jul, 25-Jul to 01-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.