[Ips-wgr] ASWFC Weekly Geo. Report (29 June 23) issued 0050 UT on 29 Jun 2023 [SEC=OFFICIAL]

[rwc]

SUBJ: ASWFC WEEKLY GEOPHYSICAL REPORT 
ISSUED ON 29 JUNE 2023
FROM THE AUSTRALIAN SPACE WEATHER FORECASTING CENTRE
ASWAS SCALE DESCRIPTION: https://bit.ly/3lmaMBx

1. SUMMARY (20 JUNE - 28 JUNE)
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 Jun   2110 3212    5  
 21 Jun   2210 1002    3  
 22 Jun   1222 3222    7  
 23 Jun   1212 2222    6  
 24 Jun   2332 3223   11  
 25 Jun   4321 3322   12  
 26 Jun   2212 2312    7  
 27 Jun   2222 2111    5  
 28 Jun   1212 1012    4  

*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 this week with a slight increase in 
geomagnetic activity on 24-25 Jun due to a weak glancing
blow from a CME.

2. FORECAST (29 JUNE - 29 JULY)
Disturbed Periods: 
1 Jul, 13 Jul. (only mildly disturbed days G0, chance of G1)

Best Quiet Periods: 
 29-30 Jun,  2-10 Jul, 15-17Jul, 25-29 Jul

3. FORECAST FOR HIGH RESOLUTION AEROMAGNETIC SURVEYS
Northern Australian Regions: 
 Disturbed Periods: None.

Central Australian Regions: 
 Disturbed Periods: None

Southern Australian Regions:
 Disturbed Periods: 13-14 Jul and 22-23 Jul.
 Best Quiet Periods: 29-30 Jun, 2-8 Jul, 16-20 Jul, 26-29 Jul.


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