Weekly Report

(last updated 23 May 2013 04:30 UT)

SUBJ: IPS WEEKLY GEOPHYSICAL REPORT ISSUED ON 23 MAY 2013, BY IPS RADIO AND SPACE SERVICES, FROM THE AUSTRALIAN SPACE FORECAST CENTRE 1. SUMMARY (14 MAY - 22 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 14 May 3122 3211 7 15 May 3122 3211 7 16 May 2322 3322 10 17 May 2211 2231 6 18 May 3433 3132 14 19 May 2132 2213 8 20 May 2111 2221 5 21 May 1111 1012 3 22 May 2222 3222 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 International Center for Space Weather Science and Education, Japan. Quiet to unsettled conditions. 2. FORECAST (23 MAY - 22 JUNE) Disturbed Periods: 24-25 May. Best Quiet Periods: 27 May - 9 Jun. 3. FORECAST FOR HIGH RESOLUTION AEROMAGNETIC SURVEYS Northern Australian Regions: Disturbed Periods: None. Best Quiet Periods: 26 May to 22 Jun. Central Australian Regions: Disturbed Periods: None. Best Quiet Periods: 26 May to 18 Jun. Southern Australian Regions: Disturbed Periods: None. Best Quiet Periods: 27 May to 1 Jun, 3-18 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.