[Ips-wgr] SWS Weekly Geo. Report (25 February 21) issued 0059 UT on 25 Feb 2021
rwc
rwc at ips.gov.au
Thu Feb 25 11:59:13 EST 2021
SUBJ: SWS WEEKLY GEOPHYSICAL REPORT
ISSUED ON 25 FEBRUARY 2021, BY Space Weather Services,
FROM THE AUSTRALIAN SPACE FORECAST CENTRE
1. SUMMARY (16 FEBRUARY - 24 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
16 Feb 2323 2311 9
17 Feb 2212 2112 5
18 Feb 1111 0001 1
19 Feb 1113 4343 13
20 Feb 3233 3433 15
21 Feb 3244 3212 13
22 Feb 2223 3232 10
23 Feb 2222 3221 7
24 Feb 1323 2342 12
*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 with active periods on 19-21 February due
to coronal hole activity and active periods on 24 February due to CME impact.
2. FORECAST (25 FEBRUARY - 27 MARCH)
Disturbed Periods:
No strong recurrent patterns, however mild activity may be experienced on:
1-2 Mar, 5-6 Mar, 12 Mar, 15 Mar, 18-22 Mar.
Best Quiet Periods:
26-28 Feb, 3-4 Mar, 8-11 Mar, 13-14 Mar, 24-27 Mar.
3. FORECAST FOR HIGH RESOLUTION AEROMAGNETIC SURVEYS
Northern Australian Regions:
Disturbed Periods: None.
Best Quiet Periods: 25 Feb - 27 Mar.
Central Australian Regions:
Mildly Disturbed Periods: 1-2 Mar, 6 Mar, 19-22 Mar.
Best Quiet Periods: 26-28 Feb, 3-5 Mar, 7-18 Mar, 23-27 Mar.
Southern Australian Regions:
Disturbed Periods: 1-2 Mar, 6 Mar, 19-22 Mar.
Best Quiet Periods: 26-28 Feb, 3-5 Mar, 7-18 Mar, 23-27 Mar.
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.
Space Weather Services email: asfc at bom.gov.au
Bureau of Meteorology
PO Box 1386 WWW: http://www.sws.bom.gov.au
Haymarket NSW 1240 AUSTRALIA FTP: ftp://ftp-out.sws.bom.gov.au
tel: +61 2 9213 8010 fax: +61 2 9213 8060
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