[Ips-wgr] ASWFC Weekly Geo. Report (06 April 23) issued 0049 UT on 06 Apr 2023 [SEC=OFFICIAL]

[rwc]

SUBJ: ASWFC WEEKLY GEOPHYSICAL REPORT 
ISSUED ON 06 APRIL 2023
FROM THE AUSTRALIAN SPACE WEATHER FORECASTING CENTRE
ASWAS SCALE DESCRIPTION: https://bit.ly/3lmaMBx

1. SUMMARY (28 MARCH - 05 APRIL)
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               
 28 Mar   1111 2112    4  
 29 Mar   2101 1112    3  
 30 Mar   3225 3242   16  
 31 Mar   3323 2222   10  
 01 Apr   2123 3223    9  
 02 Apr   2223 1012    6  
 03 Apr   2222 3332   10  
 04 Apr   3322 2122    8  
 05 Apr   2212 3222    7  

*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.


Isolated G1 period observed on 30 Mar due to coronal hole wind stream.
G0 conditions observed on other days.


2. FORECAST (06 APRIL - 06 MAY)
Disturbed Periods: 
11 Apr.

Best Quiet Periods: 
 7-9 Apr, 12-15 Apr, 22-25 Apr, 03-06 May.

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

Central Australian Regions:
 Mildly Disturbed Periods: 11-12 Apr, 18-Apr, 22-Apr, 27-29 Apr.

Southern Australian Regions:
 Disturbed Periods: 11-12 Apr, 18-Apr, 22-Apr, 27-29 Apr.

Best Quiet Periods: 6-10 Apr, 13-17 Apr, 19-20 Apr, 24-25 Apr, 03-06 May


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