[Ips-dsgr] SWS Daily Report - 07 September 20 issued 2331 UT on 07 Sep 2020
Regional Warning Centre
rwc at ips.gov.au
Tue Sep 8 09:31:33 EST 2020
SUBJ: SWS DAILY SOLAR AND GEOPHYSICAL REPORT
ISSUED AT 2330UT/07 SEPTEMBER 2020 BY Space Weather Services
FROM THE AUSTRALIAN SPACE FORECAST CENTRE
SUMMARY FOR 07 SEPTEMBER AND FORECAST FOR 08 SEPTEMBER - 10 SEPTEMBER
STATUS INDICATORS SOL:GREEN MAG:GREEN ION: GREEN
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1A. SOLAR SUMMARY
Activity 07 Sep: Very low
Flares: none.
Observed 10.7 cm flux/Equivalent Sunspot Number for 07 Sep: 70/5
1B. SOLAR FORECAST
08 Sep 09 Sep 10 Sep
Activity Very low Very low Very low
Fadeouts None expected None expected None expected
10.7cm/SSN 70/5 70/5 70/5
COMMENT: Solar activity was very low on UT day 07 September.
There are currently no numbered regions on the visible solar
disk. Very low levels of solar activity are expected for the
next three UT days, 08-10 September. No Earth-directed CMEs were
observed in the coronagraph imagery. During 07 September, the
solar wind speed was mostly near its background levels, varying
in the range 330-400 km/s. The total IMF (Bt) and the north-south
IMF component (Bz) varied in the ranges 3-5 nT and +2/-3 nT,
respectively. During the next three UT days, 08-10 September,
the solar wind speed is expected to remain near its background
levels.
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2A. MAGNETIC SUMMARY
Geomagnetic field for Australian Region 07 Sep: Quiet
Estimated Indices 07 Sep : A K
Australian Region 1 11101100
Cocos Island 1 11100100
Darwin 1 11101100
Townsville 3 22101101
Learmonth 1 11101100
Alice Springs 2 12101100
Gingin 2 11101200
Canberra 1 11100100
Hobart 2 11111100
Estimated Antarctic Regional K Indices 07 Sep :
Macquarie Island 2 00121100
Mawson 8 33311211
Observed Regional daily pc3 Indices 07 Sep :
Darwin 0 (Quiet)
Townsville 0 (Quiet)
Learmonth 0 (Quiet)
Alice Springs 0 (Quiet)
Gingin 0 (Quiet)
Canberra 0 (Quiet)
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 07 Sep : A
Fredericksburg 4
Planetary 5
Observed AFr/Ap Indices 06 Sep : A K
Fredericksburg 5
Planetary 3 2100 1012
2B. MAGNETIC FORECAST
Date Ap Conditions
08 Sep 5 Quiet
09 Sep 5 Quiet
10 Sep 5 Quiet
COMMENT: During UT day 07 September, geomagnetic conditions were
quiet in the Australian region and quiet to unsettled in the
Antarctic region. Global geomagnetic conditions are expected
to be mostly quiet with a chance of isolated unsettled periods
during the next three UT days, 08-10 September.
-----------------------------------------------------------
3A. GLOBAL HF PROPAGATION SUMMARY
Latitude Band
Date Low Middle High
07 Sep Normal Normal Normal
PCA Event : No event.
3B. GLOBAL HF PROPAGATION FORECAST
Latitude Band
Date Low Middle High
08 Sep Normal Normal Normal
09 Sep Normal Normal Normal
10 Sep Normal Normal Normal
COMMENT: Mostly normal HF propagation conditions are expected
for the next three UT days, 08-10 September.
-----------------------------------------------------------
4A. AUSTRALIAN REGION IONOSPHERIC SUMMARY
Date T index
07 Sep 1
Observed Australian Regional MUFs
Cocos Island Region:
Near predicted monthly values during local day.
Enhanced by 30% during local night.
Niue Island Region:
No data available
Northern Australian Region:
Near predicted monthly values during local day.
Enhanced by 15% during local night.
Southern Australian Region:
Near predicted monthly values during local day.
Enhanced by 35% during local night.
Antarctic Region (Casey/Scott Base/Davis/Mawson):
Enhanced by 30% over the UT day.
Monthly T index:
Month T index
Aug 6
Sep -13
Oct -14
4B. AUSTRALIAN REGION IONOSPHERIC FORECAST
Date T index MUFs
08 Sep 0 Near predicted monthly values
09 Sep 0 Near predicted monthly values
10 Sep 0 Near predicted monthly values
COMMENT: On UT day 07 September, MUFs in the Australian and Antarctic
regions were mostly near predicted monthly values. Mild enhancements
were observed in mostly during local night. Sporadic E and Spread
F were observed over some sites. MUFs in the Australian region
are expected to be mostly near predicted monthly values on UT
days 08-10 September.
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5. SPACE ENVIRONMENT SUMMARY
GOES satellite data for 06 Sep
Daily Proton Fluence >1 MeV: 7.4E+04
Daily Proton Fluence >10 MeV: 4.7E+04
Daily Electron Fluence >2 MeV: 2.30E+08 (moderate fluence)
Electron Fluence Daily Deep Dielectric Discharge Probability:16%
Fluence (flux accumulation over 24hrs)/ cm2-ster-day.
X-ray background: A1.2
DSCOVR Satellite Solar Wind Day Averaged Data for 06 Sep
Speed: 383 km/sec Density: 3.1 p/cc Temp: 88800 K Bz: 0 nT
(Courtesy Space Weather Prediction Center, Boulder USA)
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Space Weather Services email: asfc at bom.gov.au
Bureau of Meteorology
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