Last updated 02 Feb 2012 02:11 UT B SUBJ: IPS WEEKLY GEOPHYSICAL REPORT ISSUED ON 02 FEBRUARY 2012, BY IPS RADIO AND SPACE SERVICES, FROM THE AUSTRALIAN SPACE FORECAST CENTRE 1. SUMMARY (24 JANUARY - 01 FEBRUARY) 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 Jan 3322 3543 18 A weak (38nT) impulse was observed in the IPS magnetometer data at 1504UT on 24 Jan. 25 Jan 2343 3212 12 26 Jan 2222 2312 7 27 Jan 2222 2211 6 28 Jan 2221 2112 5 29 Jan 2212 0212 5 30 Jan 1111 1333 7 31 Jan 2221 1012 4 01 Feb 2332 2112 8 *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. active on 24 Jan. quiet to unsettled on other days. 2. FORECAST (02 FEBRUARY - 03 MARCH) Disturbed Periods: No strong recurrent patterns, however mild activity may be experienced on: 4 Feb, 12 Feb, 18 Feb to 21 Feb. Best Quiet Periods: 2 Feb to 3 Feb, 5 Feb to 11 Feb, 13 Feb to 17 Feb, 22 Feb to 28 Feb. 3. FORECAST FOR HIGH RESOLUTION AEROMAGNETIC SURVEYS Northern Australian Regions: Disturbed Periods: None. Best Quiet Periods: 2 Feb to 28 Feb. Central Australian Regions: Mildly Disturbed Periods: 21-23 Feb Best Quiet Periods: 2 Feb to 19 Feb, 25 Feb to 28 Feb. Southern Australian Regions: Disturbed Periods: 21-23 Feb Best Quiet Periods: 2 Feb to 19 Feb, 25 Feb to 28 Feb. 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.