[Ips-wgr] ASWFC Weekly Geo. Report (27 July 23) issued 0142 UT on 27 Jul 2023 [SEC=OFFICIAL]

[rwc]

SUBJ: ASWFC WEEKLY GEOPHYSICAL REPORT 
ISSUED ON 27 JULY 2023
FROM THE AUSTRALIAN SPACE WEATHER FORECASTING CENTRE
ASWAS SCALE DESCRIPTION: https://bit.ly/3lmaMBx

1. SUMMARY (18 JULY - 26 JULY)
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               
 18 Jul   3222 3121    8  
 19 Jul   1110 2001    2  
 20 Jul   1110 1322    5  In the BOM magnetometer data for 20 
                          Jul, a weak (11nT) impulse was observed 
                          at 1646UT.
 21 Jul   2321 0113    6  
 22 Jul   3212 1001    4  
 23 Jul   1111 2121    4  
 24 Jul   2210 1012    3  
 25 Jul   1121 3223    7  In the BOM magnetometer data for 25 
                          Jul, a weak (12nT) impulse was observed 
                          at 2231UT.
 26 Jul   2442 3212   12  

*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.


G0 geomagnetic conditions were observed in the Australian region this week.
G1 planetary conditions were observed on 26-27 Jul.

2. FORECAST (27 JULY - 26 AUGUST)
Disturbed Periods: 
 3-Aug.

Best Quiet Periods: 
 29-Jul to 1-Aug, 5-12 Aug, 14-26 Aug.

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

Central Australian Regions: NA

Southern Australian Regions:
 Disturbed Periods: 27-28 Jul, 3-Aug.
 Best Quiet Periods: 29-Jul to 1-Aug, 5-12 Aug, 14-26 Aug.


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