[Ips-wgr] SWS Weekly Geo. Report (20 July 17) issued 0158 UT on 20 Jul 2017 [SEC=UNCLASSIFIED]

[rwc]

SUBJ: SWS WEEKLY GEOPHYSICAL REPORT 
ISSUED ON 20 JULY 2017, BY Space Weather Services,
FROM THE AUSTRALIAN SPACE FORECAST CENTRE

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   1321 2211    6  
 12 Jul   1111 1100    2  
 13 Jul   0100 1001    1  
 14 Jul   1100 0000    0  
 15 Jul   1101 0010    1  
 16 Jul   1355 4444   27  In the SWS magnetometer data for 16 
                          Jul, a weak (34nT) impulse was observed 
                          at 0601UT.
 17 Jul   2354 4511   22  
 18 Jul   2221 1000    3  
 19 Jul   1101 0011    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 16-17 Jul.   Quiet to unsettled on other days.

2. FORECAST (20 JULY - 19 AUGUST)
Disturbed Periods: 
Mild disturbance possible:
 21-22 Jul,  6-8  Aug.

Best Quiet Periods: 
20 Jul,  23-27 Jul,  30 Jul to 4 Aug,  9-12 Aug.

3. FORECAST FOR HIGH RESOLUTION AEROMAGNETIC SURVEYS
Northern Australian Regions: 
Disturbed Periods: None.
 
Central Australian Regions: 
Mildly Disturbed Periods:  21-22 Jul,  6-8  Aug
Best Quiet Periods: 20 Jul,  23-27 Jul,  30 Jul to 4 Aug,  9-12 Aug.

Southern Australian Regions:
 Disturbed Periods: 21-22 Jul,  6-8  Aug
 Best Quiet Periods: 20 Jul,  23-27 Jul,  30 Jul to 4 Aug,  9-12 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.

Space Weather Services              email: asfc at bom.gov.au
Bureau of Meteorology
PO Box 1386                         WWW: http://www.sws.bom.gov.au
Haymarket NSW 1240  AUSTRALIA       FTP: ftp://ftp-out.sws.bom.gov.au
tel: +61 2 9213 8010                fax: +61 2 9213 8060 

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