Weekly Report
(last updated 09 Jul 2026 02:04 UT)
SUBJ: ASWFC WEEKLY GEOPHYSICAL REPORT ISSUED ON 09 JULY 2026 FROM THE AUSTRALIAN SPACE WEATHER FORECASTING CENTRE ASWAS SCALE DESCRIPTION: https://bit.ly/3lmaMBx 1. SUMMARY (30 JUNE - 08 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 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. 02 Jul 1111 0000 1 03 Jul 1000 2223 4 In the BOM magnetometer data for 03 Jul, a weak (8nT) impulse was observed at 1200UT. 04 Jul 4555 5543 38 05 Jul 3333 3222 12 06 Jul 1110 1120 2 07 Jul 0100 0011 1 08 Jul 1232 2231 8 *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 on 4-Jul. G0 on all other days. 2. FORECAST (09 JULY - 08 AUGUST) Disturbed Periods: 9-10 Jul, 21-23, Jul. Best Quiet Periods: 12-20 Jul, 25-Jul, 29-Jul to 3-Aug. 3. FORECAST FOR HIGH RESOLUTION AEROMAGNETIC SURVEYS Northern Australian Regions: Disturbed Periods: None. Best Quiet Periods: 12-20 Jul, 25-Jul to 3-Aug Central Australian Regions: Disturbed Periods: None. Mildly Disturbed Periods: 9-10 Jul, 21-23 Jul. Best Quiet Periods: 12-20 Jul, 25-Jul to 3-Aug Southern Australian Regions: Disturbed Periods: 9-10 Jul, 21-23 Aug Best Quiet Periods: 12-20 Jul, 29-Ju; to 3-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.
