[Ips-wgr] ASWFC Weekly Geo. Report (18 May 23) issued 0148 UT on 18 May 2023 [SEC=OFFICIAL]

[rwc]

SUBJ: ASWFC WEEKLY GEOPHYSICAL REPORT 
ISSUED ON 18 MAY 2023
FROM THE AUSTRALIAN SPACE WEATHER FORECASTING CENTRE
ASWAS SCALE DESCRIPTION: https://bit.ly/3lmaMBx

1. SUMMARY (09 MAY - 17 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               
 09 May   2211 2113    6  In the BOM magnetometer data for 09 
                          May, a weak (10nT) impulse was observed 
                          at 2248UT.
 10 May   4533 4322   20  In the BOM magnetometer data for 10 
                          May, a weak (10nT) impulse was observed 
                          at 0713UT.
 11 May   2221 1122    5  
 12 May   2243 4322   14  In the BOM magnetometer data for 12 
                          May, a weak (19nT) impulse was observed 
                          at 0631UT.
 13 May   2220 1233    7  
 14 May   1110 1222    4  
 15 May   1110 0121    2  
 16 May   2221 1111    4  
 17 May   1110 0001    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.


Active on 10 May.   Quiet to unsettled on other days.

2. FORECAST (18 MAY - 17 JUNE)
Disturbed Periods: 
 21-24 May, 2-4 Jun, 17-Jun.

Best Quiet Periods: 
 18-20 May,  26-May to 1-Jun,  6-15 Jun.

3. FORECAST FOR HIGH RESOLUTION AEROMAGNETIC SURVEYS
Northern Australian Regions:
 Disturbed Periods: None.
 Best Quiet Periods: 18-20 May, 25-May to 1-Jun, 3-16 Jun.

Central Australian Regions:
 Disturbed Periods: 24-May, 17-Jun.
 Best Quiet Periods: 18-20 May, 28-May to 1-Jun, 4-16 Jun.

Southern Australian Regions:
 Disturbed Periods: 21-24 May, 2-4 Jun, 17-Jun.
 Best Quiet Periods: 18-20 May, 30-May to 1-Jun, 5-15 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