[Ips-wgr] ASWFC Weekly Geo. Report (03 April 25) issued 0041 UT on 03 Apr 2025 [SEC=OFFICIAL]

[Australian Space Weather Forecasting Centre]

SUBJ: ASWFC WEEKLY GEOPHYSICAL REPORT 
ISSUED ON 03 APRIL 2025
FROM THE AUSTRALIAN SPACE WEATHER FORECASTING CENTRE
ASWAS SCALE DESCRIPTION: https://bit.ly/3lmaMBx

1. SUMMARY (25 MARCH - 02 APRIL)
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               
 25 Mar   2223 2353   15  In the BOM magnetometer data for 25 
                          Mar, a weak (8nT) impulse was observed 
                          at 2009UT.
 26 Mar   3333 4454   23  In the BOM magnetometer data for 26 
                          Mar, a weak (10nT) impulse was observed 
                          at 2228UT.
 27 Mar   3433 4423   18  
 28 Mar   2322 2223    9  
 29 Mar   2221 1102    4  
 30 Mar   2221 1111    4  
 31 Mar   1222 1101    4  
 01 Apr   1120 1022    3  
 02 Apr   3323 3133   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.


Active on 26-27 Mar.   Quiet to unsettled on other days.

2. FORECAST (03 APRIL - 03 MAY)
Disturbed Periods: 
4-5 Apr, 8-9 Apr, 17-18 Apr, 22-23 Apr.

Best Quiet Periods: 
 3 Apr, 11-16 Apr, 25-30 Apr

3. FORECAST FOR HIGH RESOLUTION AEROMAGNETIC SURVEYS
Northern Australian Regions:
 Disturbed Periods: None.
 Best Quiet Periods: 3 Apr, 11-16 Apr, 24-30 Apr

Central Australian Regions:
 Disturbed Periods: 23 Apr.
 Mildly Disturbed Periods: 5 Apr, 8-9 Apr, 17-18 Apr, 22-23 Apr
 Best Quiet Periods: 3 Apr, 11-16 Apr, 25-30 Apr

Southern Australian Regions:
 Disturbed Periods: 4-5 Apr, 8-10 Apr, 15-Apr, 17-18 Apr, 22-24 Apr, 1-2 May
 Best Quiet Periods: 3 Apr, 12-14 Apr, 16-Apr, 25-28 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