[Ips-wgr] ASWFC Weekly Geo. Report (15 May 25) issued 0209 UT on 15 May 2025 [SEC=OFFICIAL]

[Australian Space Weather Forecasting Centre]

SUBJ: ASWFC WEEKLY GEOPHYSICAL REPORT 
ISSUED ON 15 MAY 2025
FROM THE AUSTRALIAN SPACE WEATHER FORECASTING CENTRE
ASWAS SCALE DESCRIPTION: https://bit.ly/3lmaMBx

1. SUMMARY (06 MAY - 14 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               
 06 May   3223 2233   11  
 07 May   2223 0111    5  
 08 May   1231 2204    8  
 09 May   2222 2343   11  
 10 May   3211 2112    6  
 11 May   2222 3143   11  
 12 May   2221 2001    4  
 13 May   1111 1232    5  
 14 May   3222 3342   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.

G0 geomagnetic conditions were observed this week. 

2. FORECAST (15 MAY - 14 JUNE)
Disturbed Periods: 
 18-21 May,  28-30 May, 14 Jun.

Best Quiet Periods: 
 15-17 May,  22-27 May, 7-9 Jun.

3. FORECAST FOR HIGH RESOLUTION AEROMAGNETIC SURVEYS
Northern Australian Regions:
 Mildly Disturbed Periods: 29 May, 31 May.
 Best Quiet Periods: 15-27 May, 2-14 Jun.

Central Australian Regions:
 Disturbed Periods: 30 May, 1 Jun.
 Mildly Disturbed Periods: 18-19 May, 21 May, 29 May, 31 May, 2-3 Jun, 14 Jun.
 Best Quiet Periods: 15-16 May, 23-27 May, 5-12 Jun.

Southern Australian Regions:
 Disturbed Periods: 18-19 May, 21 May, 29 May to 3 Jun, 14 Jun.
 Best Quiet Periods: 15-16 May, 23-27 May, 5-12 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