[Ips-wgr] SWS Weekly Geo. Report (26 April 18) issued 0207 UT on 26 Apr 2018 [SEC=UNCLASSIFIED]
rwc
rwc at ips.gov.au
Thu Apr 26 12:07:54 EST 2018
SUBJ: SWS WEEKLY GEOPHYSICAL REPORT
ISSUED ON 26 APRIL 2018, BY Space Weather Services,
FROM THE AUSTRALIAN SPACE FORECAST CENTRE
1. SUMMARY (17 APRIL - 25 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
Australian Region*
Date K-INDICES A
17 Apr 1110 0101 1
18 Apr 1002 3211 4
19 Apr 1101 0000 1
20 Apr 3346 5442 30 In the SWS magnetometer data for 20
Apr, a weak (10nT) impulse was observed
at 0022UT.
21 Apr 2233 2221 8 In the SWS magnetometer data for 21
Apr, a weak (10nT) impulse was observed
at 0022UT.
22 Apr 1110 2111 3
23 Apr 1110 0021 2
24 Apr 0010 1111 1
25 Apr 1110 0001 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.
Major storm on 20 Apr. Quiet to unsettled on other days.
2. FORECAST (26 APRIL - 26 MAY)
Disturbed Periods:
No strong recurrent patterns, however mild activity may be experienced on:
26-27 Apr.
Best Quiet Periods:
28 Apr to 5 May, 11-16 May, 19-22 May.
3. FORECAST FOR HIGH RESOLUTION AEROMAGNETIC SURVEYS
Northern Australian Regions:
Disturbed Periods: None.
Central Australian Regions:
Disturbed periods: Mildly disturbed 7-9 May, 17-18 May
Best Quiet Periods: 27 Apr to 6 May, 10-16 May, 19-23 May.
Southern Australian Regions:
Disturbed Periods: Disturbed 7-9 May, 17-18 May
Best Quiet Periods: 27 Apr to 6 May, 10-16 May, 19-23 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
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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