[Ips-wgr] ASWFC Weekly Geo. Report (19 December 24) issued 0116 UT on 19 Dec 2024 [SEC=OFFICIAL]

[Australian Space Weather Forecasting Centre]

SUBJ: ASWFC WEEKLY GEOPHYSICAL REPORT 
ISSUED ON 19 DECEMBER 2024
FROM THE AUSTRALIAN SPACE WEATHER FORECASTING CENTRE
ASWAS SCALE DESCRIPTION: https://bit.ly/3lmaMBx

1. SUMMARY (10 DECEMBER - 18 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               
 10 Dec   2222 1112    5  
 11 Dec   2121 2112    5  
 12 Dec   1121 1111    3  
 13 Dec   1111 2201    3  
 14 Dec   2122 2223    7  
 15 Dec   2223 3222    9  
 16 Dec   1322 1233    9  
 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  

*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 storm on 17 Dec.  G0 on other days.

2. FORECAST (19 DECEMBER - 18 JANUARY)
Disturbed Periods: 
No strong recurrent patterns, however mild activity may be experienced on:
 22 Dec,  30 Dec,  5 Jan,  11-12 Jan.

Best Quiet Periods: 
 20-21 Dec,  24-29 Dec,  31 Dec to 4 Jan,  6-9 Jan,  14 Jan.

3. FORECAST FOR HIGH RESOLUTION AEROMAGNETIC SURVEYS
Northern Australian Regions:
 Disturbed Periods: None.
 Mildly Disturbed Periods: None. 
 Best Quiet Periods: 20 Dec to 10 Jan.

Central Australian Regions:
 Disturbed Periods: None.
 Mildly Disturbed Periods: None.
 Best Quiet Periods: 24-29 Dec, 31-Dec to 9-Jan

Southern Australian Regions:
 Disturbed Periods: None.
 Best Quiet Periods: 20-21 Dec, 24-29 Dec, 31 Dec to 4 Jan, 6-9 Jan, 14 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