[Ips-wgr] ASWFC Weekly Geo. Report (14 September 23) issued 0143 UT on 14 Sep 2023 [SEC=OFFICIAL]

[rwc]

SUBJ: ASWFC WEEKLY GEOPHYSICAL REPORT 
ISSUED ON 14 SEPTEMBER 2023
FROM THE AUSTRALIAN SPACE WEATHER FORECASTING CENTRE
ASWAS SCALE DESCRIPTION: https://bit.ly/3lmaMBx

1. SUMMARY (05 SEPTEMBER - 13 SEPTEMBER)
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               
 05 Sep   1121 2432    9  In the BOM magnetometer data for 05 
                          Sep, a weak (10nT) impulse was observed 
                          at 1525UT.
 06 Sep   2120 3211    5  
 07 Sep   1111 2101    3  
 08 Sep   2110 1211    3  
 09 Sep   1222 2201    5  
 10 Sep   2110 0012    2  
 11 Sep   2211 2112    5  
 12 Sep   1213 4543   18  In the BOM magnetometer data for 12 
                          Sep, a weak (12nT) impulse was observed 
                          at 1120UT and a weak (18nT) impulse 
                          was observed at 1217UT.
 13 Sep   3222 3312    9  

*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.


G1 conditions in the AUstralian region were observed on 12-Sep following
the unexpected arrival of a glancing impact from a CME. Planetary conditions
reached the G2 level on 12-Sep. Two weak magnetic impulses were observed on
this day. An additional weak impulse was observed on 5-Sep, but no periods
above G0 were observed. G0 conditions were observed on all other days.

2. FORECAST (14 SEPTEMBER - 14 OCTOBER)
Disturbed Periods: 
 29-30 Sep.

Best Quiet Periods: 
 15-28 Sep, 2-14 Oct.

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

Central Australian Regions: NA

Southern Australian Regions:
 Disturbed Periods: 29-30 Sep.
 Best Quiet Periods: 15-28 Sep, 2-14 Oct.


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