[Ips-wgr] ASWFC Weekly Geo. Report (11 May 23) issued 0208 UT on 11 May 2023 [SEC=OFFICIAL]

[rwc]

SUBJ: ASWFC WEEKLY GEOPHYSICAL REPORT 
ISSUED ON 11 MAY 2023
FROM THE AUSTRALIAN SPACE WEATHER FORECASTING CENTRE
ASWAS SCALE DESCRIPTION: https://bit.ly/3lmaMBx

1. SUMMARY (02 MAY - 10 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               
 02 May   2223 1021    6  
 03 May   0010 0201    1  
 04 May   1110 0112    2  
 05 May   1110 0111    2  
 06 May   3333 4222   13  In the BOM magnetometer data for 06 
                          May, a weak (11nT) impulse was observed 
                          at 0130UT.
 07 May   1222 2422    9  
 08 May   3221 3322    9  In the BOM magnetometer data for 08 
                          May, a weak (11nT) impulse was observed 
                          at 1358UT.
 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.

*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 (11 MAY - 10 JUNE)
Disturbed Periods: 
11-12 May, 20-12 May, 24-26 May, 03-Jun, 07-Jun .

Best Quiet Periods: 
 14 May,  17 May-19 May, 30 May to 1 Jun,  6 Jun.

3. FORECAST FOR HIGH RESOLUTION AEROMAGNETIC SURVEYS
Northern Australian Regions:
 Disturbed Periods: None.
 Best Quiet Periods: 13-14 May, 17-19 May, 27-May to 06 Jun.

Central Australian Regions:
 Disturbed Periods: None. 11-May
 Mildly Disturbed Periods: 12-May, 20-21 May, 25-May
 Best Quiet Periods: 13-14 May, 17-19 May, 27-May to 01-Jun

Southern Australian Regions:
 Disturbed Periods: 11-13 May, 20-21 May, 25-May.
 Best Quiet Periods: 14-May,  17 May-19 May, 30-May to 1-Jun,  6-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