[Ips-wgr] ASWFC Weekly Geo. Report (20 July 23) issued 0227 UT on 20 Jul 2023 [SEC=OFFICIAL]

[rwc]

SUBJ: ASWFC WEEKLY GEOPHYSICAL REPORT 
ISSUED ON 20 JULY 2023
FROM THE AUSTRALIAN SPACE WEATHER FORECASTING CENTRE
ASWAS SCALE DESCRIPTION: https://bit.ly/3lmaMBx

1. SUMMARY (11 JULY - 19 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               
 11 Jul   1121 1111    3  
 12 Jul   1210 1111    3  
 13 Jul   2120 2211    4  In the BOM magnetometer data for 13 
                          Jul, a weak (10nT) impulse was observed 
                          at 1649UT.
 14 Jul   2221 2332    8  In the BOM magnetometer data for 14 
                          Jul, a weak (12nT) impulse was observed 
                          at 1611UT.
 15 Jul   3213 1010    5  
 16 Jul   1110 0023    3  In the BOM magnetometer data for 16 
                          Jul, a weak (8nT) impulse was observed 
                          at 1922UT.
 17 Jul   2234 4143   16  
 18 Jul   3222 3121    8  
 19 Jul   1110 2001    2  

*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 this week. 

2. FORECAST (20 JULY - 19 AUGUST)
Disturbed Periods: 
 20-21 Jul.

Best Quiet Periods: 
 28-31 Jul,  5-6 Aug,  8-9 Aug.

3. FORECAST FOR HIGH RESOLUTION AEROMAGNETIC SURVEYS
Northern Australian Regions: NA
 Disturbed Periods: None.

Central Australian Regions:
 Mildly Disturbed Periods: 22-23 Jul, 13-14 Aug.
 Best Quiet Periods: 25-Jul to 11-Aug, 16-Aug.

Southern Australian Regions:
 Disturbed Periods: 22-23 Jul, 13-14 Aug.
 Best Quiet Periods: 25-Jul to 11-Aug, 16-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