Weekly Report

(last updated 19 Apr 2018 02:27 UT)

SUBJ: SWS WEEKLY GEOPHYSICAL REPORT ISSUED ON 19 APRIL 2018, BY Space Weather Services, FROM THE AUSTRALIAN SPACE FORECAST CENTRE 1. SUMMARY (10 APRIL - 18 APRIL) 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 10 Apr 2333 3322 12 11 Apr 3232 1001 6 12 Apr 1222 3222 7 13 Apr 2222 2112 6 14 Apr 1101 2211 3 15 Apr 1210 3001 3 16 Apr 1000 0101 1 17 Apr 1110 0101 1 18 Apr 1002 3211 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 (19 APRIL - 19 MAY) Disturbed Periods: No strong recurrent patterns, however mild activity may be experienced on: 19-23 Apr, 6-10 May, 16-19 May. Best Quiet Periods: 24 Apr to 5 May, 11-15 May. 3. FORECAST FOR HIGH RESOLUTION AEROMAGNETIC SURVEYS Northern Australian Regions: NA. All days quiet. Central Australian Regions: Disturbed Periods: Mildly disturbed 20-23 Apr, 7-9 May, 17-19 May Best Quiet Periods: 25 Apr to 5 May, 11-15 May Southern Australian Regions: Disturbed Periods: 20-23 Apr, 7-9 May, 17-19 May Best Quiet Periods: 25 Apr to 5 May, 11-15 May 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.