Weekly Report

(last updated 20 Mar 2025 00:46 UT)

SUBJ: ASWFC WEEKLY GEOPHYSICAL REPORT ISSUED ON 20 MARCH 2025 FROM THE AUSTRALIAN SPACE WEATHER FORECASTING CENTRE ASWAS SCALE DESCRIPTION: https://bit.ly/3lmaMBx 1. SUMMARY (11 MARCH - 19 MARCH) 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 11 Mar 1122 2112 5 12 Mar 3333 4443 19 13 Mar 3334 5233 19 14 Mar 3233 3323 13 15 Mar 2322 4311 10 16 Mar 2123 3022 7 17 Mar 2221 3233 9 18 Mar 2222 3212 7 19 Mar 2333 2333 13 *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. G2 geomagnetic planetary conditions were observed on 14-Mar. G1 geomagnetic planetary conditions were observed on 12, 13 and 19-Mar. This activity is largely attributed to a coronal hole. The Australian region reached G1 on 13-Mar, but was otherwise G0 this week. 2. FORECAST (20 MARCH - 19 APRIL) Disturbed Periods: 20-22 Mar, 26-28 Mar, 4-5 Apr, 8-9 Apr, 15 Apr. Best Quiet Periods: 22-25 Mar, 29-Mar to 2 Apr. 3. FORECAST FOR HIGH RESOLUTION AEROMAGNETIC SURVEYS Northern Australian Regions: Disturbed Periods: None. Mildly disturbed periods: None. Best Quiet Periods: 22-25 Mar, 29-Mar to 2-Apr, 6-7 Apr, 14-Apr. Central Australian Regions: Disturbed Periods: None. Mildly disturbed periods: 26-27 Mar, 4-5 Apr, 8-9 Apr. Best Quiet Periods: 24-Mar, 29-Mar to 2-Apr, 6-7 Apr. Southern Australian Regions: Disturbed Periods: 20-Mar, 22-Mar, 25-28 Mar, 3-5 Apr, 8-9 Apr. Best Quiet Periods: 24-Mar, 29-Mar to 2-Apr. 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.