Last updated 03 Jul 2008 02:00 UT SUBJ: IPS WEEKLY GEOPHYSICAL REPORT ISSUED ON 03 JULY 2008, BY IPS RADIO AND SPACE SERVICES, FROM THE AUSTRALIAN SPACE FORECAST CENTRE 1. SUMMARY (24 JUNE - 02 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 24 Jun 1111 0112 3 25 Jun 2221 1222 6 26 Jun 3334 2232 13 27 Jun 3323 2321 10 28 Jun 1212 2221 5 29 Jun 2222 1122 6 30 Jun 2111 2121 4 01 Jul 2222 3111 6 02 Jul 1111 1001 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. The remained predominantly at quiet to unsettled levels during this period with isolated active periods on 26 June due to the effect of a recurrent coronal hole. 2. FORECAST (03 JULY - 02 AUGUST) Disturbed Periods: Active periods possible on 11, 12 and 23 Jul. Best Quiet Periods: 3 Jul, 5 to 10 Jul, 16 Jul, 18 Jul to 21 Jul, 25 Jul, and 27 Jul to 29 Jul. 3. FORECAST FOR HIGH RESOLUTION AEROMAGNETIC SURVEYS Northern Australian Regions: NA Central Australian Regions: Disturbed Periods: None. Best Quiet Periods: 3 Jul, 6 Jul to 9 Jul, 14 Jul to 26 Jul. Southern Australian Regions: Disturbed Periods: None. Best Quiet Periods: 3 Jul to 8 Jul, 14 Jul to 26 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.