[Ips-wgr] ASWFC Weekly Geo. Report (30 November 23) issued 0054 UT on 30 Nov 2023 [SEC=OFFICIAL]

[rwc]

SUBJ: ASWFC WEEKLY GEOPHYSICAL REPORT 
ISSUED ON 30 NOVEMBER 2023
FROM THE AUSTRALIAN SPACE WEATHER FORECASTING CENTRE
ASWAS SCALE DESCRIPTION: https://bit.ly/3lmaMBx

1. SUMMARY (21 NOVEMBER - 29 NOVEMBER)
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               
 21 Nov   2333 3323   13  
 22 Nov   3434 4432   20  
 23 Nov   1121 1001    2  
 24 Nov   1111 2223    6  
 25 Nov   2245 5543   28  In the BOM magnetometer data for 25 
                          Nov, a weak (23nT) impulse was observed 
                          at 0835UT.
 26 Nov   3231 2012    7  
 27 Nov   1111 2212    4  
 28 Nov   2222 1222    6  
 29 Nov   1111 2011    3  

*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 disturbed conditions were observed on 25-Nov due to a CME arrival.
A mild increase in geomagnetic activity was observed on 21-22-Nov due to a
coronal hole wind stream.

2. FORECAST (30 NOVEMBER - 30 DECEMBER)
Disturbed Periods: 
A strong geomagnetic disturbance G3-G4, is expected from late 30-Nov to 01-Dec
due to a sequence of recent CMEs. Mild to moderate disturbances may be
experienced on:
4-6 Dec, 19 Dec,  22 Dec.

Best Quiet Periods: 
 7-8 Dec,  13-17 Dec,  23-26 Dec.

3. FORECAST FOR HIGH RESOLUTION AEROMAGNETIC SURVEYS
Northern Australian Regions:
 Disturbed Periods: 01-Dec
 Best Quiet Periods: 03-Dec to 26 Dec.

Central Australian Regions:
 Disturbed Periods: 01-Dec
 Best Quiet Periods: 04-26 Dec.

Southern Australian Regions:
 Disturbed Periods: 01-Dec, 5-Dec, 7-9 Dec, 19-Dec
 Best Quiet Periods: 11-18 Dec,  23-26 Dec.


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