Weekly Report

(last updated 13 May 2021 01:45 UT)

SUBJ: SWS WEEKLY GEOPHYSICAL REPORT ISSUED ON 13 MAY 2021, BY Space Weather Services, FROM THE AUSTRALIAN SPACE FORECAST CENTRE 1. SUMMARY (04 MAY - 12 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 04 May 1111 0011 2 05 May 0000 0001 0 06 May 1110 1000 1 07 May 0000 0001 0 08 May 1001 1000 1 09 May 0100 0101 1 10 May 1322 1111 5 11 May 1010 0000 0 12 May 0144 6523 25 In the SWS magnetometer data for 12 May, a weak (25nT) impulse was observed at 0638UT and a weak (14nT) impulse was observed at 0949UT. *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. Active on 12 May. Quiet to unsettled on other days. 2. FORECAST (13 MAY - 12 JUNE) Disturbed Periods: 13-16 May, 10-12 June. Best Quiet Periods: 18-19 May, 25 May - 8 Jun. 3. FORECAST FOR HIGH RESOLUTION AEROMAGNETIC SURVEYS Northern Australian Regions: Disturbed Periods: None. Best Quiet Periods: 19 May - 8 June. Central Australian Regions: Mildly Disturbed Periods: 14-18 May, 10-12 June. Best Quiet Periods: 19 May - 8 June. Southern Australian Regions: Disturbed Periods: 14-18 May, 10-12 June. Best Quiet Periods: 19 May - 8 June. 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.