[Ips-wgr] ASWFC Weekly Geo. Report (04 May 23) issued 0328 UT on 04 May 2023 [SEC=OFFICIAL]

[rwc]

SUBJ: ASWFC WEEKLY GEOPHYSICAL REPORT 
ISSUED ON 04 MAY 2023
FROM THE AUSTRALIAN SPACE WEATHER FORECASTING CENTRE
ASWAS SCALE DESCRIPTION: https://bit.ly/3lmaMBx

1. SUMMARY (25 APRIL - 03 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               
 25 Apr   2111 3232    7  
 26 Apr   2223 4332   12  
 27 Apr   3333 3332   14  
 28 Apr   2333 4432   16  
 29 Apr   2234 3332   13  
 30 Apr   1231 2101    5  
 01 May   1121 2122    5  
 02 May   2223 1021    6  
 03 May   0010 0201    1  

*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 in the Australian region were observed
for the period 25-Apr to 3-May. Conditions were slightly elevated
over 26-29 Apr, due to coronal hole high speed wind stream effects.

2. FORECAST (04 MAY - 03 JUNE)
Disturbed Periods: 
 7-9 May, 22-26 May

Best Quiet Periods: 
 10-20 May,  28-May to 2-Jun

3. FORECAST FOR HIGH RESOLUTION AEROMAGNETIC SURVEYS
Northern Australian Regions:
 Disturbed Periods: None.
 Best Quiet Periods: 4-6 May, 9-20 May, 28-May to 3-Jun.

Central Australian Regions:
 Disturbed Periods: None.
 Mildly Disturbed Periods: 7-9 May, 23-27 May
 Best Quiet Periods: 4-6 May, 10-20 May 30-May to 2-Jun.

Southern Australian Regions:
 Disturbed Periods: 7-9 May, 23-27 May.
 Best Quiet Periods: 10-20 May, 31-May to 2-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