[Ips-wgr] ASWFC Weekly Geo. Report (29 May 25) issued 0251 UT on 29 May 2025 [SEC=OFFICIAL]

[Australian Space Weather Forecasting Centre]

SUBJ: ASWFC WEEKLY GEOPHYSICAL REPORT 
ISSUED ON 29 MAY 2025
FROM THE AUSTRALIAN SPACE WEATHER FORECASTING CENTRE
ASWAS SCALE DESCRIPTION: https://bit.ly/3lmaMBx

1. SUMMARY (20 MAY - 28 MAY)
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               
 20 May   2333 3222   11  
 21 May   2232 1111    6  
 22 May   2221 1011    4  
 23 May   2222 1101    4  
 24 May   2110 0001    2  
 25 May   2221 1001    3  
 26 May   1120 2112    4  In the BOM magnetometer data for 26 
                          May, a weak (8nT) impulse was observed 
                          at 1410UT.
 27 May   2212 2233    8  
 28 May   3323 1332   11  

*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.

G0 geomagnetic conditions were observed this week. 

2. FORECAST (29 MAY - 28 JUNE)
Disturbed Periods: 
29 May to 2 Jun,  13-15 Jun,  24-28 Jun.

Best Quiet Periods: 
 4-11 Jun, 18-22 Jun.

3. FORECAST FOR HIGH RESOLUTION AEROMAGNETIC SURVEYS
Northern Australian Regions:
 Mildly Disturbed Periods: 30 May, 1 Jun, 26 Jun, 28 Jun.
 Best Quiet Periods: 3-28 Jun.

Central Australian Regions:
 Disturbed Periods: 30 May, 1 Jun, 26 Jun, 28 Jun.
 Mildly Disturbed Periods: 29 May, 31 May, 2-3 Jun, 13-18 Jun, 24-25 Jun, 27
Jun.
 Best Quiet Periods: 5-11 Jun,  20-22 Jun.

Southern Australian Regions:
 Disturbed Periods: 29 May to 3 Jun, 13-18 Jun, 24-28 Jun.
 Best Quiet Periods: 5-11 Jun, 20-22 Jun.


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