[Ips-wgr] ASWFC Weekly Geo. Report (20 March 25) issued 0046 UT on 20 Mar 2025 [SEC=OFFICIAL]

[Australian Space Weather Forecasting Centre]

SUBJ: ASWFC WEEKLY GEOPHYSICAL REPORT 
ISSUED ON 20 MARCH 2025
FROM THE AUSTRALIAN SPACE WEATHER FORECASTING CENTRE
ASWAS SCALE DESCRIPTION: https://bit.ly/3lmaMBx

1. SUMMARY (11 MARCH - 19 MARCH)
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               
 11 Mar   1122 2112    5  
 12 Mar   3333 4443   19  
 13 Mar   3334 5233   19  
 14 Mar   3233 3323   13  
 15 Mar   2322 4311   10  
 16 Mar   2123 3022    7  
 17 Mar   2221 3233    9  
 18 Mar   2222 3212    7  
 19 Mar   2333 2333   13  

*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.


G2 geomagnetic planetary conditions were observed on 14-Mar.
G1 geomagnetic planetary conditions were observed on 12, 13 and 19-Mar.
This activity is largely attributed to a coronal hole. The Australian 
region reached G1 on 13-Mar, but was otherwise G0 this week.

2. FORECAST (20 MARCH - 19 APRIL)
Disturbed Periods: 
20-22 Mar,  26-28 Mar,  4-5 Apr,  8-9 Apr,  15 Apr.

Best Quiet Periods: 
 22-25 Mar,  29-Mar to 2 Apr.

3. FORECAST FOR HIGH RESOLUTION AEROMAGNETIC SURVEYS
Northern Australian Regions:
 Disturbed Periods: None.
 Mildly disturbed periods: None.
 Best Quiet Periods: 22-25 Mar, 29-Mar to 2-Apr, 6-7 Apr, 14-Apr.

Central Australian Regions:
 Disturbed Periods: None.
 Mildly disturbed periods: 26-27 Mar, 4-5 Apr, 8-9 Apr. 
 Best Quiet Periods: 24-Mar, 29-Mar to 2-Apr, 6-7 Apr.

Southern Australian Regions:
 Disturbed Periods: 20-Mar, 22-Mar, 25-28 Mar, 3-5 Apr, 8-9 Apr.
 Best Quiet Periods: 24-Mar, 29-Mar to 2-Apr. 

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