[Ips-dsgr] SWS Daily Report - 08 April 17 issued 2330 UT on 08 Apr 2017 [SEC=UNCLASSIFIED]
Regional Warning Centre
rwc at sws.bom.gov.au
Sun Apr 9 09:30:17 EST 2017
SUBJ: SWS DAILY SOLAR AND GEOPHYSICAL REPORT
ISSUED AT 2330UT/08 APRIL 2017 BY Space Weather Services
FROM THE AUSTRALIAN SPACE FORECAST CENTRE
SUMMARY FOR 08 APRIL AND FORECAST FOR 09 APRIL - 11 APRIL
STATUS INDICATORS SOL:GREEN MAG:GREEN ION: GREEN
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1A. SOLAR SUMMARY
Activity 08 Apr: Low
Flares: none.
Observed 10.7 cm flux/Equivalent Sunspot Number for 08 Apr: 73/9
1B. SOLAR FORECAST
09 Apr 10 Apr 11 Apr
Activity Very low Very low Very low
Fadeouts None expected None expected None expected
10.7cm/SSN 72/8 72/8 72/8
COMMENT: Solar activity was low over the last 24 hours, with
the largest event being a C1.2 flare from region 2645 (S09W92),
which is no longer on the solar disk. No CMEs were observed.
Solar activity is expected to be very low for the next 3 days.
The solar wind speed picked up, probably due to a northern hemisphere
coronal hole, peaking at ~680 km/s, currently ~600 km/s. The
total IMF strength peaked at 11 nT, currently 5 nT. The Bz component
varied between +/-6 nT, with mostly southward periods 04-09 UT
and 19-23 UT. The solar wind speed could remain elevated for
the next day or two.
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2A. MAGNETIC SUMMARY
Geomagnetic field for Australian Region 08 Apr: Quiet to Unsettled
Estimated Indices 08 Apr : A K
Australian Region 8 22331222
Cocos Island - --------
Darwin 6 22221222
Townsville 8 22331222
Learmonth 12 32232333
Alice Springs 7 22231222
Norfolk Island 8 22331122
Culgoora 8 22331222
Gingin 12 22332333
Camden 8 22331222
Canberra 7 12321222
Launceston 11 22332323
Hobart 10 22332322
Estimated Antarctic Regional K Indices 08 Apr :
Macquarie Island 14 22442323
Casey 14 43332233
Mawson 57 44452268
Observed Regional daily pc3 Indices 08 Apr :
Darwin 0 (Quiet)
Townsville 0 (Quiet)
Learmonth 0 (Quiet)
Alice Springs 0 (Quiet)
Gingin 25 (Quiet to unsettled)
Canberra 45 (Unsettled)
Melbourne NA
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.
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.
Estimated AFr/Ap Indices 08 Apr : A
Fredericksburg 11
Planetary 15
Observed AFr/Ap Indices 07 Apr : A K
Fredericksburg 9
Planetary 9 2222 1133
2B. MAGNETIC FORECAST
Date Ap Conditions
09 Apr 12 Unsettled
10 Apr 8 Quiet to Unsettled
11 Apr 5 Quiet
COMMENT: Magnetic conditions were quiet to unsettled across the
Australia region on 8-Apr. Similar conditions are expected on
9-10 Apr, with quieter conditions returning 11-Apr.
-----------------------------------------------------------
3A. GLOBAL HF PROPAGATION SUMMARY
Latitude Band
Date Low Middle High
08 Apr Normal Normal Normal-poor
PCA Event : No event.
3B. GLOBAL HF PROPAGATION FORECAST
Latitude Band
Date Low Middle High
09 Apr Normal Normal Normal-fair
10 Apr Normal Normal Normal-fair
11 Apr Normal Normal Normal
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4A. AUSTRALIAN REGION IONOSPHERIC SUMMARY
Date T index
08 Apr 13
Observed Australian Regional MUFs
Cocos Island Region:
Near predicted monthly values.
Niue Island Region:
Depressed by 15% during local day.
Near predicted monthly values during local night.
Northern Australian Region:
Near predicted monthly values.
Southern Australian Region:
Mostly near predicted monthly values.
Antarctic Region (Casey/Scott Base/Davis/Mawson):
Depressed by 15% over the UT day.
Monthly T index:
Month T index
Mar 11
Apr 14
May 14
4B. AUSTRALIAN REGION IONOSPHERIC FORECAST
Date T index MUFs
09 Apr 10 Near predicted monthly values/depressed 0 to
15%
10 Apr 10 Near predicted monthly values/depressed 0 to
15%
11 Apr 10 Near predicted monthly values/depressed 0 to
15%
COMMENT: MUFs were near monthly predicted values across Australia
on 8-Apr. Minor daytime depressions were observed at Niue Is,
spread-F in Tasmania 10-20 UT and sporadic-E in Canberra around
11 UT. MUFs are expected to be near monthly predicted values
with some minor depressions for the next 3 days.
-----------------------------------------------------------
5. SPACE ENVIRONMENT SUMMARY
GOES satellite data for 07 Apr
Daily Proton Fluence >1 MeV: 5.9E+06
Daily Proton Fluence >10 MeV: 1.5E+04
Daily Electron Fluence >2 MeV: 7.80E+06 (normal fluence)
Electron Fluence Daily Deep Dielectric Discharge Probability: 1%
Fluence (flux accumulation over 24hrs)/ cm2-ster-day.
X-ray background: A9.4
ACE Satellite Solar Wind Day Averaged Data for 07 Apr
Speed: 433 km/sec Density: 4.8 p/cc Temp: 186000 K Bz: 0 nT
(Courtesy Space Weather Prediction Center, Boulder USA)
ACE data can be incorrect during strong proton events.
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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
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