[Ips-wgr] SWS Weekly Geo. Report (20 April 17) issued 0119 UT on 20 Apr 2017 [SEC=UNCLASSIFIED]
rwc at ips.gov.au
Thu Apr 20 11:19:06 EST 2017
SUBJ: SWS WEEKLY GEOPHYSICAL REPORT
ISSUED ON 20 APRIL 2017, BY Space Weather Services,
FROM THE AUSTRALIAN SPACE FORECAST CENTRE
1. SUMMARY (11 APRIL - 19 APRIL)
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
Date K-INDICES A
11 Apr 1123 2231 7
12 Apr 2111 0001 2
13 Apr 1100 2221 3
14 Apr 1222 3221 7
15 Apr 1110 1110 2
16 Apr 1112 0010 2
17 Apr 0010 1101 1
18 Apr 1011 1112 3
19 Apr 2321 0222 6
*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.
Quiet to unsettled conditions.
2. FORECAST (20 APRIL - 20 MAY)
23-25 Apr, 27 Apr, 20 May.
Best Quiet Periods:
22 Apr, 29-30 Apr, 9-10 May, 12-15 May.
3. FORECAST FOR HIGH RESOLUTION AEROMAGNETIC SURVEYS
Northern Australian Regions:
Disturbed Periods: None.
Best Quiet Periods: 30 Apr - 4 May, 6-16 May.
Central Australian Regions:
Disturbed Periods: None.
Best Quiet Periods: 1-4 May, 7-15 May.
Southern Australian Regions:
Disturbed Periods: 23-29 Apr, 5 May.
Best Quiet Periods: 7-15 May.
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
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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