[Ips-wgr] IPS Weekly Geo. Report (24 September 09)
rwc
rwc at ips.gov.au
Thu Sep 24 11:30:46 EST 2009
SUBJ: IPS WEEKLY GEOPHYSICAL REPORT
ISSUED ON 24 SEPTEMBER 2009, BY IPS RADIO AND SPACE SERVICES,
FROM THE AUSTRALIAN SPACE FORECAST CENTRE
1. SUMMARY (15 SEPTEMBER - 23 SEPTEMBER)
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
15 Sep 1321 2212 6
16 Sep 2232 1122 7
17 Sep 2222 1111 5
18 Sep 2211 2111 4
19 Sep 1211 1011 3
20 Sep 1211 2122 5
21 Sep 2233 3111 8
22 Sep 2222 2111 5
23 Sep 2210 0011 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.
Quiet to Unsettled conditions observed over the last 7 days.
Unsettled conditions expected 25Sep-27Sep with possible Active
periods 26Sep due to coronal hole effects.
2. FORECAST (24 SEPTEMBER - 24 OCTOBER)
Disturbed Periods:
No strong recurrent patterns, however mild activity may be experienced on:
25 Sep to 26 Sep, 14 Oct.
Best Quiet Periods:
24 Sep, 27 Sep to 13 Oct, 15 Oct to 20 Oct.
3. FORECAST FOR HIGH RESOLUTION AEROMAGNETIC SURVEYS
Northern Australian Regions:
Disturbed Periods: None.
Best Quiet Periods: 24 Sep to 20 Oct.
Central Australian Regions: NA
Southern Australian Regions:
Disturbed Periods: None.
Best Quiet Periods: 24 Sep to 12 Oct, 14 Oct to 20 Oct.
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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