[Ips-wgr] ASWFC Weekly Geo. Report (10 August 23) issued 0158 UT on 10 Aug 2023 [SEC=OFFICIAL]

[rwc]

SUBJ: ASWFC WEEKLY GEOPHYSICAL REPORT 
ISSUED ON 10 AUGUST 2023
FROM THE AUSTRALIAN SPACE WEATHER FORECASTING CENTRE
ASWAS SCALE DESCRIPTION: https://bit.ly/3lmaMBx

1. SUMMARY (01 AUGUST - 09 AUGUST)
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               
 01 Aug   1111 2321    5  
 02 Aug   2213 3321    9  
 03 Aug   1212 1100    3  
 04 Aug   0122 2333    8  
 05 Aug   4544 2101   17  In the BOM magnetometer data for 05 
                          Aug, a weak (15nT) impulse was observed 
                          at 0254UT.
 06 Aug   1110 0001    1  
 07 Aug   2111 3133    8  
 08 Aug   2111 1111    3  
 09 Aug   1111 3122    5  

*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 for the majority of the
week, with a period of G1 observed on 5-Aug due to a CME impact.

2. FORECAST (10 AUGUST - 09 SEPTEMBER)
Disturbed Periods: 
No strong recurrent patterns, however mild activity may be experienced on:
 12-14 Aug, 8-9 Sep.

Best Quiet Periods: 
 16-31 Aug, 1-6 Sep

Note that the majority of geomagnetic activity of late has been
driven by CME impacts rather than coronal hole effects. CME
impacts are impossible to forecast on the monthly scale as they
can only be analysed once an ejection from the sun is observed.
Due to the high amount of CME impacts recently there is a  risk 
of further impacts over Aug-Sep.

3. FORECAST FOR HIGH RESOLUTION AEROMAGNETIC SURVEYS
Northern Australian Regions: NA

Central Australian Regions: NA

Southern Australian Regions:
 Disturbed Periods: None.
 Best Quiet Periods: 10-15 Aug,  17-21 Aug,  24 Aug to 5 Sep.


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