[Ips-wgr] IPS Weekly Geo. Report (29 December 11) issued 0214 UT on 29 Dec 2011
rwc at ips.gov.au
Thu Dec 29 13:14:28 EST 2011
SUBJ: IPS WEEKLY GEOPHYSICAL REPORT
ISSUED ON 29 DECEMBER 2011, BY IPS RADIO AND SPACE SERVICES,
FROM THE AUSTRALIAN SPACE FORECAST CENTRE
1. SUMMARY (20 DECEMBER - 28 DECEMBER)
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
Date K-INDICES A
20 Dec 2222 1232 7
21 Dec 2112 2223 7
22 Dec 2211 1112 4
23 Dec 1111 0011 2
24 Dec 1121 0112 3
25 Dec 1211 0111 3
26 Dec 1010 1111 2
27 Dec 1110 0011 1
28 Dec 1212 3322 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.
Quiet to unsettled conditions.
A weak (11nT) impulse was observed in the IPS
magnetometer data at 1115UT on 28 Dec.
2. FORECAST (29 DECEMBER - 28 JANUARY)
Active on 29 Dec and 30 Dec.
Best Quiet Periods:
2 Jan to 5 Jan and 8 Jan to 28 Jan.
3. FORECAST FOR HIGH RESOLUTION AEROMAGNETIC SURVEYS
Northern Australian Regions:
Best Quiet Periods:
2 Jan to 5 Jan and 9 Jan to 28 Jan.
Central Australian Regions:
Mildly disturbed Periods: 29-30 Dec.
Best Quiet Periods: 2 Jan to 5 Jan and 9 Jan to 28 Jan.
Southern Australian Regions:
Disturbed Periods: 29-30 Dec.
Best Quiet Periods: 2 Jan to 5 Jan and 7 Jan to 28 Jan.
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
Geomagnetic activity can frequently be determined by short timescale
solar events that cannot be forecast a week in advance, particularly
at solar maximum.
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