Last updated 24 May 2012 03:04 UT SUBJ: IPS WEEKLY GEOPHYSICAL REPORT ISSUED ON 24 MAY 2012, BY IPS RADIO AND SPACE SERVICES, FROM THE AUSTRALIAN SPACE FORECAST CENTRE 1. SUMMARY (15 MAY - 23 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 15 May 2221 0002 3 16 May 2211 3223 8 17 May 1110 1011 2 18 May 2212 1211 5 19 May 1211 1111 3 20 May 3321 2111 7 21 May 1100 0021 2 22 May 2422 2343 14 23 May 3332 1221 9 *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 Space Environment Research Center, Japan. Quiet to unsettled conditions. 2. FORECAST (24 MAY - 23 JUNE) Disturbed Periods: 4-6 Jun, 18 Jun. Best Quiet Periods: 26-29 May, 31 May to 3 Jun, 10-13 Jun, 15 Jun. 3. FORECAST FOR HIGH RESOLUTION AEROMAGNETIC SURVEYS Northern Australian Regions: NA Disturbed Periods: None. Best Quiet Periods: 24 May to 8 Jun, 14-18 Jun. Central Australian Regions: Disturbed Periods: None. Best Quiet Periods: 24 May to 8 Jun, 14-18 Jun. Southern Australian Regions: Disturbed Periods: None. Best Quiet Periods: 24 May to 4 Jun, 7-8 Jun, 14-17 Jun. 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.