(last updated 21 Jun 2018 01:47 UT)
SUBJ: SWS WEEKLY GEOPHYSICAL REPORT ISSUED ON 21 JUNE 2018, BY Space Weather Services, FROM THE AUSTRALIAN SPACE FORECAST CENTRE 1. SUMMARY (12 JUNE - 20 JUNE) 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 12 Jun 1110 0000 1 13 Jun 0010 0001 0 14 Jun 1121 1011 3 15 Jun 1111 0000 1 16 Jun 1010 0000 0 17 Jun 1110 0111 2 18 Jun 3234 3211 11 19 Jun 1122 2011 4 20 Jun 1122 1000 2 *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. Mostly Quiet conditions expected for the forecast week, with Active to Minor Storm periods around 28Jun due to recurrent coronal hole effects. 2. FORECAST (21 JUNE - 21 JULY) Disturbed Periods: 27-30 Jun. Best Quiet Periods: 21-26 Jun, 01-14Jul and 16-17Jul. 3. FORECAST FOR HIGH RESOLUTION AEROMAGNETIC SURVEYS Northern Australian Regions: Disturbed Periods: None. Best Quiet Periods: 21Jun to 17Jul. Central Australian Regions: Mildly Disturbed Periods: 28Jun - 01Jul. Best Quiet Periods: 21Jun to 27Jun, 02Jul-21Jul. Southern Australian Regions: Disturbed Periods: 28Jun - 01Jul Best Quiet Periods: 21Jun -27Jun, 02Jul-21Jul. 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.