Weekly Report
(last updated 21 May 2026 03:41 UT)
SUBJ: ASWFC WEEKLY GEOPHYSICAL REPORT ISSUED ON 21 MAY 2026 FROM THE AUSTRALIAN SPACE WEATHER FORECASTING CENTRE ASWAS SCALE DESCRIPTION: https://bit.ly/3lmaMBx 1. SUMMARY (12 MAY - 20 MAY) 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 12 May 0110 0011 1 13 May 1111 2222 5 14 May 2110 0001 2 15 May 2222 5335 19 16 May 4343 2322 15 17 May 2223 2222 8 18 May 2222 3212 7 19 May 1244 3432 16 20 May 2210 0001 2 *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 geomagnetic storming was observed on 15-May in the Australian region. G1 periods were observed at Canberra and Kennaook Cape Grim on 16-May, although G0 conditions were observed in the Australian region. G0 geomagnetic conditions were observed on all other days of the week. 2. FORECAST (21 MAY - 20 JUNE) Disturbed Periods: 30-May to 06-Jun, 11-14 Jun. Best Quiet Periods: 22-29 May, 08-10 Jun, 16-20 Jun. 3. FORECAST FOR HIGH RESOLUTION AEROMAGNETIC SURVEYS Northern Australian Regions: Disturbed Periods: None. Best Quiet Periods: 21 May to 20 Jun. Central Australian Regions: Mildly Disturbed Periods: 04-05 Jun, 11-16 Jun Best Quiet Periods: 22-May to 02-Jun, 06-09 Jun, 18-20 Jun Southern Australian Regions: Disturbed Periods: 04-05 Jun, 11-16 Jun Best Quiet Periods: 24-27 May, 29-May to 02-Jun, 06-09 Jun, 18-20 Jun 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.
