[Ips-wgr] ASWFC Weekly Geo. Report (26 December 24) issued 0201 UT on 26 Dec 2024 [SEC=OFFICIAL]

[Australian Space Weather Forecasting Centre]

SUBJ: ASWFC WEEKLY GEOPHYSICAL REPORT 
ISSUED ON 26 DECEMBER 2024
FROM THE AUSTRALIAN SPACE WEATHER FORECASTING CENTRE
ASWAS SCALE DESCRIPTION: https://bit.ly/3lmaMBx

1. SUMMARY (17 DECEMBER - 25 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               
 17 Dec   2555 5533   34  In the BOM magnetometer data for 17 
                          Dec, a weak (23nT) impulse was observed 
                          at 0916UT, a weak (36nT) impulse was 
                          observed at 1227UT and a weak (40nT) 
                          impulse was observed at 1502UT.
 18 Dec   3232 3332   12  
 19 Dec   3221 1122    6  
 20 Dec   2212 3322    8  
 21 Dec   3223 2333   12  
 22 Dec   2223 3333   12  
 23 Dec   3221 2333   10  
 24 Dec   2321 2223    8  
 25 Dec   2322 1011    5  

*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.

A CME impact on 17-Dec produced G1 geomagnetic conditions at the 
global level and in the Australian region. G0 conditions were observed
for the rest of the week.

2. FORECAST (26 DECEMBER - 25 JANUARY)
Disturbed Periods: 
 26-27 Dec, 04-06 Jan, 10-12 Jan

Best Quiet Periods: 
 29-Dec to 02-Jan, 08-09 Jan, 13-25 Jan.

3. FORECAST FOR HIGH RESOLUTION AEROMAGNETIC SURVEYS
Northern Australian Regions:
 Disturbed Periods: None.
 Best Quiet Periods: 28 Dec to 25 Jan.

Central Australian Regions:
 Disturbed Periods: None.
 Best Quiet Periods: 28 Dec to 25 Jan.

Southern Australian Regions:
 Disturbed Periods:26-27 Dec, 04-06 Jan, 10-12 Jan.
 Best Quiet Periods: 29-Dec to 02-Jan, 08-09 Jan, 13-25 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