Weekly Report

(last updated 07 Dec 2023 01:31 UT)

SUBJ: ASWFC WEEKLY GEOPHYSICAL REPORT ISSUED ON 07 DECEMBER 2023 FROM THE AUSTRALIAN SPACE WEATHER FORECASTING CENTRE ASWAS SCALE DESCRIPTION: https://bit.ly/3lmaMBx 1. SUMMARY (28 NOVEMBER - 06 DECEMBER) 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 28 Nov 2222 1222 6 29 Nov 1111 2011 3 30 Nov 2110 1011 2 01 Dec 4336 6553 41 In the BOM magnetometer data for 01 Dec, a weak (17nT) impulse was observed at 0019UT, a weak (26nT) impulse was observed at 0925UT and a weak (9nT) impulse was observed at 0953UT. 02 Dec 4211 1212 7 In the BOM magnetometer data for 02 Dec, a weak (12nT) impulse was observed at 0019UT. 03 Dec 3432 3422 15 In the BOM magnetometer data for 03 Dec, a weak (10nT) impulse was observed at 0121UT and a weak (9nT) impulse was observed at 1304UT. 04 Dec 1333 2222 9 05 Dec 3333 3323 14 06 Dec 2222 3212 7 *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 conditions were observed in the Australian region on 1-Dec, G0 conditions were observed on all other days. On the planetary level, G3 geomagnetic conditions were observed on 1-Dec and G1 conditions were observed on 2-Dec. G0 were observed on all other days 2. FORECAST (07 DECEMBER - 06 JANUARY) Disturbed Periods: 7 Dec, 10-12 Dec, 18-20 Dec, 22-23 Dec and 31-Dec to 4-Jan Best Quiet Periods: 9 Dec, 14-16 Dec, 25-29 Dec and 6-Jan 3. FORECAST FOR HIGH RESOLUTION AEROMAGNETIC SURVEYS Northern Australian Regions: Disturbed Periods: NA Best Quiet Periods: 7-Dec to 6-Jan Central Australian Regions: Disturbed Periods: NA Best Quiet Periods: 9 Dec, 14-16 Dec, 25-29 Dec and 6-Jan Southern Australian Regions: Disturbed Periods: 7-10 Dec, 19-20 Dec, 22-25 Dec, 28-29 Dec, 31-Dec to 6-Jan. Best Quiet Periods: 12-17 Dec and 27-Dec. 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.