[Ips-wgr] ASWFC Weekly Geo. Report (13 April 23) issued 0237 UT on 13 Apr 2023 [SEC=OFFICIAL]

[rwc]

SUBJ: ASWFC WEEKLY GEOPHYSICAL REPORT 
ISSUED ON 13 APRIL 2023
FROM THE AUSTRALIAN SPACE WEATHER FORECASTING CENTRE
ASWAS SCALE DESCRIPTION: https://bit.ly/3lmaMBx

1. SUMMARY (04 APRIL - 12 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               
 04 Apr   3322 2122    8  
 05 Apr   2212 3222    7  
 06 Apr   1114 3132    9  
 07 Apr   2222 2001    4  
 08 Apr   2211 0001    2  
 09 Apr   2110 0021    2  
 10 Apr   2233 2212    8  
 11 Apr   1231 1111    5  
 12 Apr   1110 1101    2  

*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 this week. 

2. FORECAST (13 APRIL - 13 MAY)
Disturbed Periods: 
 13-14 Apr.

Best Quiet Periods: 
 22-25 Apr,  4-6 May,  8-10 May.

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

Central Australian Regions: 
 Mildly Disturbed Periods: 18 Apr, 21-22 Apr, 27-29 Apr, 1 May.
 Best Quiet Periods: 14-16 Apr, 24-25 Apr, 3-13 May.

Southern Australian Regions:
 Disturbed Periods: 18 Apr, 21-22 Apr, 27-29 Apr, 1 May.
 Best Quiet Periods: 14-16 Apr, 24-25 Apr, 3-13 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