[Ips-wgr] ASWFC Weekly Geo. Report (22 May 25) issued 0239 UT on 22 May 2025 [SEC=OFFICIAL]

[Australian Space Weather Forecasting Centre]

SUBJ: ASWFC WEEKLY GEOPHYSICAL REPORT 
ISSUED ON 22 MAY 2025
FROM THE AUSTRALIAN SPACE WEATHER FORECASTING CENTRE
ASWAS SCALE DESCRIPTION: https://bit.ly/3lmaMBx

1. SUMMARY (13 MAY - 21 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               
 13 May   1111 1232    5  
 14 May   3222 3342   12  
 15 May   2222 1312    7  
 16 May   2232 2322    9  
 17 May   3434 4332   18  
 18 May   3233 3432   14  
 19 May   2211 3111    5  
 20 May   2333 3222   11  
 21 May   2232 1111    6  

*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 conditions observed throughout the period of 13-21 May in the
Australian region. G2 global conditions were observed on 17-May
and G1 global conditions were observed on 18-May. 

2. FORECAST (22 MAY - 21 JUNE)
Disturbed Periods: 
 22-May, 28-May to 05-Jun, 13-14 Jun, 17-Jun.

Best Quiet Periods: 
 24-26 May, 07-11 Jun, 16-Jun, 18-21 Jun.

3. FORECAST FOR HIGH RESOLUTION AEROMAGNETIC SURVEYS
Northern Australian Regions:
 Disturbed Periods: None.
 Best Quiet Periods: 24-26 May, 07-11 Jun, 16-Jun, 18-21 Jun.

Central Australian Regions:
 Disturbed Periods: 30-May to 02-Jun
 Best Quiet Periods: 24-26 May, 07-11 Jun, 16-Jun, 18-21 Jun.

Southern Australian Regions:
 Disturbed Periods: 22-23 May, 28-May to 05-Jun, 13-18 Jun
 Best Quiet Periods: 25-26 May, 07-11 Jun, 20-21 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