Weekly Report

(last updated 22 Jul 2021 01:12 UT)

SUBJ: SWS WEEKLY GEOPHYSICAL REPORT ISSUED ON 22 JULY 2021, BY Space Weather Services, FROM THE AUSTRALIAN SPACE FORECAST CENTRE 1. SUMMARY (13 JULY - 21 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 13 Jul 1101 0000 1 14 Jul 0112 3432 9 In the SWS magnetometer data for 14 Jul, a weak (8nT) impulse was observed at 1006UT. 15 Jul 1222 2221 6 16 Jul 1100 0010 1 17 Jul 1110 1110 2 18 Jul 1000 1101 1 19 Jul 2130 1111 4 20 Jul 2233 1231 9 21 Jul 2211 1210 4 *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. Quiet to unsettled conditions. 2. FORECAST (22 JULY - 21 AUGUST) Disturbed Periods: 27 July, 10 August. Best Quiet Periods: 25-26 July, 29 July to 9 August, 12-21 August. 3. FORECAST FOR HIGH RESOLUTION AEROMAGNETIC SURVEYS Northern Australian Regions: Disturbed Periods: None. Best Quiet Periods: 25 July to 21 August. Central Australian Regions: Mildly Disturbed Periods: None. Best Quiet Periods: 25 July to 21 August. Southern Australian Regions: Disturbed Periods: None. Best Quiet Periods: 25 July to 21 August. 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.