[Ips-wgr] IPS Weekly Geo. Report (30 April 09)
rwc
rwc at ips.gov.au
Thu Apr 30 11:37:12 EST 2009
SUBJ: IPS WEEKLY GEOPHYSICAL REPORT
ISSUED ON 30 APRIL 2009, BY IPS RADIO AND SPACE SERVICES,
FROM THE AUSTRALIAN SPACE FORECAST CENTRE
1. SUMMARY (21 APRIL - 29 APRIL)
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
21 Apr 1221 0011 3
22 Apr 2212 2001 4
23 Apr 1111 0011 2
24 Apr 3221 2222 7
25 Apr 1211 1112 4
26 Apr 1211 1011 3
27 Apr 1212 0011 3
28 Apr 1210 1112 3
29 Apr 1211 1111 3
*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.
2. FORECAST (30 APRIL - 30 MAY)
Disturbed Periods:
No strong recurrent patterns, however mild activity may be experienced on:
6 May to 9 May, 15 May.
Best Quiet Periods:
30 Apr to 5 May, 10 May to 14 May, 16 May to 26 May.
3. FORECAST FOR HIGH RESOLUTION AEROMAGNETIC SURVEYS
Northern Australian Regions: Quiet
Central Australian Regions: Quiet
Southern Australian Regions: Quiet
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.
IPS Radio and Space Services email: asfc at ips.gov.au
PO Box 1386 WWW: http://www.ips.gov.au
Haymarket NSW 1240 AUSTRALIA FTP: ftp://ftp.ips.gov.au
tel: +61 2 9213 8010 fax: +61 2 9213 8060
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