Weekly Report

(last updated 18 Apr 2019 02:45 UT)

SUBJ: SWS WEEKLY GEOPHYSICAL REPORT ISSUED ON 18 APRIL 2019, BY Space Weather Services, FROM THE AUSTRALIAN SPACE FORECAST CENTRE 1. SUMMARY (09 APRIL - 17 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 09 Apr 2132 1311 7 10 Apr 2221 2321 7 11 Apr 2222 2201 5 12 Apr 2112 2121 5 13 Apr 2211 2011 4 14 Apr 1110 0101 1 15 Apr 1122 2122 5 16 Apr 2121 3000 4 17 Apr 1000 0011 1 *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 (18 APRIL - 18 MAY) Disturbed Periods: No strong recurrent patterns, however mild activity may be experienced on: 24 Apr, 27 Apr, 30 Apr to 3 May, 5-7 May, 12-13 May. Best Quiet Periods: 18-22 Apr, 25-26 Apr, 28-29 Apr, 8-11 May. 3. FORECAST FOR HIGH RESOLUTION AEROMAGNETIC SURVEYS Northern Australian Regions: NA Central Australian Regions: NA Southern Australian Regions: Disturbed Periods: None. Best Quiet Periods: 18-22 Apr, 26 Apr to 11 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.