[Ips-dsgr] SWS Daily Report - 06 April 21 issued 2330 UT on 06 Apr 2021
Regional Warning Centre
rwc at ips.gov.au
Wed Apr 7 09:30:06 EST 2021
SUBJ: SWS DAILY SOLAR AND GEOPHYSICAL REPORT
ISSUED AT 2330UT/06 APRIL 2021 BY Space Weather Services
FROM THE AUSTRALIAN SPACE FORECAST CENTRE
SUMMARY FOR 06 APRIL AND FORECAST FOR 07 APRIL - 09 APRIL
STATUS INDICATORS SOL:GREEN MAG:GREEN ION: GREEN
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1A. SOLAR SUMMARY
Activity 06 Apr: Very low
Flares: none.
Observed 10.7 cm flux/Equivalent Sunspot Number for 06 Apr: 74/11
1B. SOLAR FORECAST
07 Apr 08 Apr 09 Apr
Activity Very low Very low Very low
Fadeouts None expected None expected None expected
10.7cm/SSN 74/11 72/8 72/8
COMMENT: Solar activity was very low on UT day 06 April. Solar
activity is expected to be very low for the next three UT days,
07-09 April. No Earth directed CMEs were observed. On 06 April,
the solar wind speed range was 300-330 km/s, with a peak total
IMF (Bt) of 9 nT, and a north-south IMF (Bz) range of +8/-4 nT.
The three day outlook (UT day 7-9 April) is for the solar wind
speed to remain mostly near its background levels.
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2A. MAGNETIC SUMMARY
Geomagnetic field for Australian Region 06 Apr: Quiet
Estimated Indices 06 Apr : A K
Australian Region 1 11101100
Cocos Island 1 11100000
Darwin 2 11101101
Townsville 3 11111111
Learmonth 2 11111100
Alice Springs 1 11001100
Gingin 1 10000110
Canberra 0 00000000
Hobart 1 01001110
Estimated Antarctic Regional K Indices 06 Apr :
Macquarie Island 0 00000000
Casey 3 22110111
Mawson 6 11000043
Observed Regional daily pc3 Indices 06 Apr :
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 06 Apr : A
Fredericksburg 3
Planetary 5
Observed AFr/Ap Indices 05 Apr : A K
Fredericksburg 5
Planetary 4 1001 2111
2B. MAGNETIC FORECAST
Date Ap Conditions
07 Apr 5 Quiet
08 Apr 5 Quiet
09 Apr 5 Quiet
COMMENT: Quiet conditions were observed in the Australian and
southern high latitudes regions on UT day 06 April. Mostly quiet
conditions are expected for the next three UT days (07-09 April).
-----------------------------------------------------------
3A. GLOBAL HF PROPAGATION SUMMARY
Latitude Band
Date Low Middle High
06 Apr Normal Normal Normal
PCA Event : No event.
3B. GLOBAL HF PROPAGATION FORECAST
Latitude Band
Date Low Middle High
07 Apr Normal Normal Normal
08 Apr Normal Normal Normal
09 Apr Normal Normal Normal
COMMENT: Mostly normal conditions are expected on 07-09 April.
-----------------------------------------------------------
4A. AUSTRALIAN REGION IONOSPHERIC SUMMARY
Date T index
06 Apr 5
Observed Australian Regional MUFs
Cocos Island Region:
No data
Niue Island Region:
No data
Near predicted monthly values during local day.
Depressed by 35% during local night.
Southern Australian Region:
Near predicted monthly values.
Antarctic Region (Casey/Scott Base/Davis/Mawson):
Enhanced by 15% over the UT day.
Monthly T index:
Month T index
Mar 9
Apr 19
May 23
4B. AUSTRALIAN REGION IONOSPHERIC FORECAST
Date T index MUFs
07 Apr 5 Near predicted monthly values
08 Apr 5 Near predicted monthly values
09 Apr 5 Near predicted monthly values
COMMENT: MUFs over the Australian regions varied mostly between
near predicted monthly levels and moderately depressed levels
on UT day 06 April. Similar MUFs conditions are expected for
the next three UT days, 07-09 April.
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5. SPACE ENVIRONMENT SUMMARY
GOES satellite data for 05 Apr
Daily Proton Fluence >1 MeV: 8.7E+04
Daily Proton Fluence >10 MeV: 4.5E+04
Daily Electron Fluence >2 MeV: 3.20E+06 (normal fluence)
Electron Fluence Daily Deep Dielectric Discharge Probability: 1%
Fluence (flux accumulation over 24hrs)/ cm2-ster-day.
X-ray background: <A1.0
DSCOVR Satellite Solar Wind Day Averaged Data for 05 Apr
Speed: 313 km/sec Density: 10.8 p/cc Temp: 19800 K Bz: 2 nT
(Courtesy Space Weather Prediction Center, Boulder USA)
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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
tel: +61 2 9213 8010 fax: +61 2 9213 8060
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