Last updated 02 Jul 2009 01:59 UT SUBJ: IPS WEEKLY GEOPHYSICAL REPORT ISSUED ON 02 JULY 2009, BY IPS RADIO AND SPACE SERVICES, FROM THE AUSTRALIAN SPACE FORECAST CENTRE 1. SUMMARY (23 JUNE - 01 JULY) 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 23 Jun 1112 0102 3 24 Jun 3442 1232 13 25 Jun 2212 3222 7 26 Jun 2211 1011 3 27 Jun 1111 1211 3 28 Jun 2221 2343 11 29 Jun 3322 2101 7 30 Jun 1212 0211 4 01 Jul 1111 0101 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 Space Environment Research Center, Japan. Mostly quiet conditions observed during this period with unsettled periods on 25 and 29 June, and active periods on 24 and 28 June. 2. FORECAST (02 JULY - 01 AUGUST) Disturbed Periods: No strong recurrent patterns, however mild activity may be experienced on: 21 Jul and 25 Jul to 26 Jul. Best Quiet Periods: 2 Jul to 20 Jul, 22 Jul to 24 Jul, and 27 Jul to 01 Aug. 3. FORECAST FOR HIGH RESOLUTION AEROMAGNETIC SURVEYS Northern Australian Regions: Disturbed Periods: None. Best Quiet Periods: 2 Jul to 28 Jul. Central Australian Regions: Disturbed Periods: None. Best Quiet Periods: 2 Jul to 28 Jul. Southern Australian Regions: Disturbed Periods: None. Best Quiet Periods: 2 Jul to 28 Jul. 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.