[Ips-wgr] ASWFC Weekly Geo. Report (27 March 25) issued 0058 UT on 27 Mar 2025 [SEC=OFFICIAL]

[Australian Space Weather Forecasting Centre]

SUBJ: ASWFC WEEKLY GEOPHYSICAL REPORT 
ISSUED ON 27 MARCH 2025
FROM THE AUSTRALIAN SPACE WEATHER FORECASTING CENTRE
ASWAS SCALE DESCRIPTION: https://bit.ly/3lmaMBx

1. SUMMARY (18 MARCH - 26 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               
 18 Mar   2222 3212    7  
 19 Mar   2333 2333   13  
 20 Mar   1221 1101    3  
 21 Mar   3222 3353   16  
 22 Mar   4422 3432   16  
 23 Mar   2221 1121    5  
 24 Mar   3323 3322   12  
 25 Mar   2223 2353   15  
 26 Mar   3333 4454   23  

*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.

In  general, coronal hole wind stream induced geomagnetic activity observed this
week. 
On 22-Mar induced activity may have had a contribution from an indistinct CME
arrival.
G1 periods observed in the Australian regional field on 21-Mar, 25-Mar and
26-Mar. 
G0 conditions on other days.


2. FORECAST (27 MARCH - 26 APRIL)
Disturbed Periods: 
27-Mar, 28-Mar,  4-5 Apr, 8-10 Apr, 20-23 Apr.

Best Quiet Periods: 
 30-Mar to 02-Apr, 06-07 Apr, 12-13 Apr.

3. FORECAST FOR HIGH RESOLUTION AEROMAGNETIC SURVEYS
Northern Australian Regions:
 Disturbed Periods: None.
 Best Quiet Periods: 29-Mar to 22 Apr.

Central Australian Regions:
 Disturbed Periods: None.
 Best Quiet Periods: 3-Mar to 22 Apr.

Southern Australian Regions:
 Disturbed Periods: 27-28 Mar, 05-06 Apr, 09-11 Apr, 23-25 Apr.
 Best Quiet Periods: 02-03 Apr, 13-19 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