[Ips-wgr] ASWFC Weekly Geo. Report (23 March 23) issued 0046 UT on 23 Mar 2023 [SEC=OFFICIAL]

[rwc]

SUBJ: ASWFC WEEKLY GEOPHYSICAL REPORT 
ISSUED ON 23 MARCH 2023
FROM THE AUSTRALIAN SPACE WEATHER FORECASTING CENTRE
ASWAS SCALE DESCRIPTION: https://bit.ly/3lmaMBx

1. SUMMARY (14 MARCH - 22 MARCH)
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               
 14 Mar   3433 3322   14  
 15 Mar   2543 2225   20  In the BOM magnetometer data for 15 
                          Mar, a weak (19nT) impulse was observed 
                          at 0427UT.
 16 Mar   3211 0001    3  
 17 Mar   1222 2002    4  
 18 Mar   2223 2121    7  
 19 Mar   2221 1222    6  
 20 Mar   2112 3412    9  
 21 Mar   1112 1212    4  
 22 Mar   3233 2321   10  

*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 periods were observed on 15-Mar due to a glancing impact
from a CME first observed on 13-Mar. G0 conditions were
observed on other days.

2. FORECAST (23 MARCH - 22 APRIL)
Disturbed Periods: 
23-26 Mar,  11-Apr, 18-Apr, 22-Apr.

Best Quiet Periods: 
 28-29 Mar  7-9 Apr,  12-13 Apr,  15 Apr.

3. FORECAST FOR HIGH RESOLUTION AEROMAGNETIC SURVEYS
Northern Australian Regions:
 Disturbed Periods: None.
 Best Quiet Periods: 4-10 Apr, 13-17 Apr, 19-20 Apr.

Central Australian Regions:
 Mildly Disturbed Periods: 26 Mar-03 Apr, 11-12 Apr, 18-Apr.
 Best Quiet Periods: 04-10 Apr, 13-17 Apr, 19-20 Apr.

Southern Australian Regions:
 Disturbed Periods: 26 Mar-03 Apr, 11-12 Apr, 18-Apr
 Best Quiet Periods: 04-10 Apr, 13-17 Apr, 19-20 Apr.


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