[Ips-wgr] ASWFC Weekly Geo. Report (23 February 23) issued 0125 UT on 23 Feb 2023 [SEC=OFFICIAL]

[rwc]

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

1. SUMMARY (14 FEBRUARY - 22 FEBRUARY)
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 Feb   2122 1112    5  
 15 Feb   2344 3533   21  
 16 Feb   3334 5422   20  In the BOM magnetometer data for 16 
                          Feb, a weak (8nT) impulse was observed 
                          at 0912UT.
 17 Feb   2221 1001    3  
 18 Feb   1111 2012    3  
 19 Feb   2111 3212    6  
 20 Feb   1123 2222    7  In the BOM magnetometer data for 20 
                          Feb, a weak (12nT) impulse was observed 
                          at 1036UT.
 21 Feb   2324 4212   12  
 22 Feb   2121 2212    5  

*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.

Planetary geomagnetic conditions reached G1 conditions on 15-Feb
and 16-Feb. Two weak shocks were observed, on 16/0912UT and 20/1036UT.
The geomagnetic activity of the 14-22 Feb period was due to glancing 
impacts from CMEs observed on 10-Feb and 17-Feb.

2. FORECAST (23 FEBRUARY - 25 MARCH)
Disturbed Periods: 
 23-24 Feb, 5-9 Mar, 21-23 Mar.

Best Quiet Periods: 
 26-Feb to 1-Mar, 3-4 Mar, 11-19 Mar, 25-Mar  

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

Central Australian Regions: 
 Mildly Disturbed Periods: 23-25 Feb, 6-8 Mar, 22-23 Mar 
 Best Quiet Periods: 26-Feb, 28-Feb to 4-Mar, 11-15 Mar, 17-21 Mar, 25-Mar

Southern Australian Regions:
 Disturbed Periods: 23-25 Feb, 6-8 Mar, 22-23 Mar 
 Best Quiet Periods: 26-Feb, 28 Feb to 4-Mar, 12-15 Mar, 18-20 Mar, 25-Mar


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