Weekly Report

(last updated 15 May 2025 02:09 UT)

SUBJ: ASWFC WEEKLY GEOPHYSICAL REPORT ISSUED ON 15 MAY 2025 FROM THE AUSTRALIAN SPACE WEATHER FORECASTING CENTRE ASWAS SCALE DESCRIPTION: https://bit.ly/3lmaMBx 1. SUMMARY (06 MAY - 14 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 06 May 3223 2233 11 07 May 2223 0111 5 08 May 1231 2204 8 09 May 2222 2343 11 10 May 3211 2112 6 11 May 2222 3143 11 12 May 2221 2001 4 13 May 1111 1232 5 14 May 3222 3342 12 *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 geomagnetic conditions were observed this week. 2. FORECAST (15 MAY - 14 JUNE) Disturbed Periods: 18-21 May, 28-30 May, 14 Jun. Best Quiet Periods: 15-17 May, 22-27 May, 7-9 Jun. 3. FORECAST FOR HIGH RESOLUTION AEROMAGNETIC SURVEYS Northern Australian Regions: Mildly Disturbed Periods: 29 May, 31 May. Best Quiet Periods: 15-27 May, 2-14 Jun. Central Australian Regions: Disturbed Periods: 30 May, 1 Jun. Mildly Disturbed Periods: 18-19 May, 21 May, 29 May, 31 May, 2-3 Jun, 14 Jun. Best Quiet Periods: 15-16 May, 23-27 May, 5-12 Jun. Southern Australian Regions: Disturbed Periods: 18-19 May, 21 May, 29 May to 3 Jun, 14 Jun. Best Quiet Periods: 15-16 May, 23-27 May, 5-12 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.