[Ips-wgr] ASWFC Weekly Geo. Report (28 December 23) issued 0040 UT on 28 Dec 2023 [SEC=OFFICIAL]

[rwc]

SUBJ: ASWFC WEEKLY GEOPHYSICAL REPORT 
ISSUED ON 28 DECEMBER 2023
FROM THE AUSTRALIAN SPACE WEATHER FORECASTING CENTRE
ASWAS SCALE DESCRIPTION: https://bit.ly/3lmaMBx

1. SUMMARY (19 DECEMBER - 27 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               
 19 Dec   3332 1122    9  
 20 Dec   3222 2212    7  
 21 Dec   1112 1000    2  
 22 Dec   1121 0111    3  
 23 Dec   1121 1213    5  
 24 Dec   2222 1221    6  
 25 Dec   2110 0122    3  
 26 Dec   1222 2112    5  
 27 Dec   2212 1111    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.


Quiet to unsettled conditions.

2. FORECAST (28 DECEMBER - 27 JANUARY)
Disturbed Periods: 
No strong recurrent patterns, however mild activity may be experienced on:
 28-Dec to 2-Jan,  11-12 Jan,  14-16 Jan and 24-27 Jan.

Best Quiet Periods: 
 4-9 Jan and 18-22 Jan

3. FORECAST FOR HIGH RESOLUTION AEROMAGNETIC SURVEYS
Northern Australian Regions:
 Disturbed Periods: None.
 Best Quiet Periods: 4-13 Jan and 17-22 Jan.

Central Australian Regions: 
 Disturbed Periods: 2-Jan.
 Best Quiet Periods: 5-13 Jan and 17-22 Jan.

Southern Australian Regions:
 Disturbed Periods: 28-Dec to 3-Jan, 15-Jan and 24-27 Jan.
 Best Quiet Periods: 5-10 Jan and 17-20 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