[Ips-wgr] ASWFC Weekly Geo. Report (29 December 22) issued 0140 UT on 29 Dec 2022 [SEC=OFFICIAL]

[rwc]

SUBJ: ASWFC WEEKLY GEOPHYSICAL REPORT 
ISSUED ON 29 DECEMBER 2022
FROM THE AUSTRALIAN SPACE WEATHER FORECASTING CENTRE
ASWAS SCALE DESCRIPTION: https://bit.ly/3lmaMBx

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
        Australian Region*              
 Date     K-INDICES    A               
 20 Dec   1222 1223    7  
 21 Dec   2122 2322    7  
 22 Dec   2122 3323    9  
 23 Dec   2232 3323   11  
 24 Dec   3433 3323   15  
 25 Dec   3211 0113    6  
 26 Dec   2123 5522   17  
 27 Dec   3334 4322   16  
 28 Dec   2221 1012    4  

*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.

G1 geomagnetic conditions observed on 26-Dec. G0 on other days.

2. FORECAST (29 DECEMBER - 28 JANUARY)
Disturbed Periods: 
 3-5 Jan, 19-23 Jan.

Best Quiet Periods: 
 1-2 Jan, 6-14 Jan.

3. FORECAST FOR HIGH RESOLUTION AEROMAGNETIC SURVEYS
Northern Australian Regions:
 No disturbed periods expected.

Central Australian Regions:
 Mildly Disturbed Periods: 4-5 Jan, 19-24 Jan, 26-27 Jan.
 Best Quiet Periods: 2 Jan, 7-17 Jan.

Southern Australian Regions:
 Disturbed Periods: 4-5 Jan, 19-24 Jan, 26-27 Jan.
 Best Quiet Periods: 2 Jan, 7-17 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 
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.

Australian Space Weather Forecasting Centre
Bureau of Meteorology
ASWFC at bom.gov.au
www.bom.gov.au | www.sws.bom.gov.au