[Ips-wgr] ASWFC Weekly Geo. Report (25 May 23) issued 0139 UT on 25 May 2023 [SEC=OFFICIAL]

[rwc]

SUBJ: ASWFC WEEKLY GEOPHYSICAL REPORT 
ISSUED ON 25 MAY 2023
FROM THE AUSTRALIAN SPACE WEATHER FORECASTING CENTRE
ASWAS SCALE DESCRIPTION: https://bit.ly/3lmaMBx

1. SUMMARY (16 MAY - 24 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               
 16 May   2221 1111    4  
 17 May   1110 0001    1  
 18 May   1100 0000    0  
 19 May   1111 1223    5  
 20 May   4344 2322   16  
 21 May   2211 3344   13  
 22 May   3333 3233   14  
 23 May   2222 0033    7  
 24 May   2311 2232    8  

*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 20 May.   Quiet to unsettled on other days.

2. FORECAST (25 MAY - 24 JUNE)
Disturbed Periods: 
06-Jun, 16-21 Jun.

Best Quiet Periods: 
 30 May to 1 Jun,  11 Jun,  13-14 Jun.

3. FORECAST FOR HIGH RESOLUTION AEROMAGNETIC SURVEYS
Northern Australian Regions:
 Disturbed Periods: None.
 Best Quiet Periods: 25 May to 20 Jun.

Central Australian Regions:
 Disturbed Periods: None.
 Mildly Disturbed Periods: 02-Jun, 06-07 Jun, 16-Jun, 18-Jun
 Best Quiet Periods: 27-May to 01-Jun, 11-15 Jun.

Southern Australian Regions:
 Disturbed Periods: 02-Jun, 06-07 Jun, 16-Jun,  18 Jun.
 Best Quiet Periods: 27-May to 01-Jun, 11-15 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