[Ips-dsgr] SWS Daily Report - 08 April 22 issued 2331 UT on 08 Apr 2022 [SEC=OFFICIAL]
Regional Warning Centre
rwc at ips.gov.au
Sat Apr 9 09:31:23 EST 2022
SUBJ: SWS DAILY SOLAR AND GEOPHYSICAL REPORT
ISSUED AT 2330UT/08 APRIL 2022 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:** YELLOW ** ION: GREEN
ASWAS SCALE DESCRIPTION: https://www.sws.bom.gov.au
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1A. SOLAR SUMMARY
Activity 08 Apr: R0
Flares: none.
Observed 10.7 cm flux/Equivalent Sunspot Number for 08 Apr: 109/59
1B. SOLAR FORECAST
09 Apr 10 Apr 11 Apr
Activity R0 R0 R0
Fadeouts None expected None expected None expected
10.7cm/SSN 108/58 105/54 102/50
COMMENT: On UT day 8 Apr, solar activity was at R0 level, with
three low-level C-class flares. There are four relatively small
and simple regions on the visible disk. Solar activity is expected
to be at R0 level on 9-11 Apr. There were no significant Earth-directed
CMEs observed in available imagery on 8 Apr. The solar wind speed
range on 8 Apr was 400-340 km/s. The total interplanetary magnetic
field IMF (Bt) strength peaked at 10 nT and the north-south IMF
(Bz) range was +5/-6 nT with a brief southward excursion up to
-8 nT at 8/2219 UT. Solar wind conditions are expected to be
mildly enhanced on 9-11 Apr due to coronal hole effects. In addition,
there may be further enhancements due to mild CME impacts.
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2A. MAGNETIC SUMMARY
Geomagnetic field for Australian Region 08 Apr: G0
Estimated Indices 08 Apr : A K
Australian Region 4 22211111
Darwin 5 22211122
Townsville 5 22211122
Learmonth 5 23211111
Alice Springs 4 22211111
Gingin 3 22201011
Canberra 3 22201011
Hobart 4 22201111
Estimated Antarctic Regional K Indices 08 Apr :
Macquarie Island 4 33200000
Casey 8 33322111
Mawson 13 54311012
Observed Regional daily pc3 Indices 08 Apr :
Darwin 0 (Quiet)
Townsville 0 (Quiet)
Learmonth 0 (Quiet)
Alice Springs 0 (Quiet)
Gingin 0 (Quiet)
Canberra 0 (Quiet)
Hobart 0 (Quiet)
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 8
Planetary 8
Observed AFr/Ap Indices 07 Apr : A K
Fredericksburg 12
Planetary 16 2 1 2 1 1 3 2 2
2B. MAGNETIC FORECAST
Date Ap Conditions
09 Apr 16 G0-G1
10 Apr 12 G0
11 Apr 12 G0
COMMENT: G0 geomagnetic conditions were observed in the Australian
region on UT day 8 Apr. G0 to G1 levels were observed in Antarctica.
G0 with possible G1 conditions expected on 9-11 Apr due to coronal
hole effects and possible weak CME impacts.
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3A. GLOBAL HF PROPAGATION SUMMARY
Latitude Band
Date Low Middle High
08 Apr Normal Normal Normal
PCA Event : No event.
3B. GLOBAL HF PROPAGATION FORECAST
Latitude Band
Date Low Middle High
09 Apr Normal Normal Normal
10 Apr Normal Normal Normal
11 Apr Normal Normal Normal
COMMENT: Normal HF propagation conditions are expected for 9-11
Apr.
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4A. AUSTRALIAN REGION IONOSPHERIC SUMMARY
Date T index
08 Apr 74
Observed Australian Regional MUFs
Cocos Island Region:
Enhanced by 30% during local day.
Enhanced by 25% during local night.
Enhanced by 25% after local dawn.
Niue Island Region:
Mostly near predicted monthly values.
Northern Australian Region:
Enhanced by 20% during local day.
Enhanced by 15% during local night.
Southern Australian Region:
Near predicted monthly values.
Antarctic Region (Casey/Scott Base/Davis/Mawson):
Near predicted monthly values over the UT day.
Monthly T index:
Month T index
Mar 64
Apr 46
May 49
4B. AUSTRALIAN REGION IONOSPHERIC FORECAST
Date T index MUFs
09 Apr 65 Near to 15% above predicted monthly values
10 Apr 50 Near predicted monthly values
11 Apr 50 Near predicted monthly values
COMMENT: Maximum usable frequencies (MUFs) on UT day 8 Apr were
near monthly predicted values or mildly enhanced. Similar conditions
are likely on 9 Apr, with near monthly predicted values for 10-11
Apr.
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5. SPACE ENVIRONMENT SUMMARY
GOES satellite data for 07 Apr
Daily Proton Fluence >1 MeV: 4.0e+05
Daily Proton Fluence >10 MeV: 4.2e+04
Daily Electron Fluence >2 MeV: 1.40e+08
Fluence (flux accumulation over 24hrs)/ cm2-ster-day.
X-ray background: B5.0
DSCOVR Satellite Solar Wind Day Averaged Data for 07 Apr
Speed: 414 km/sec Density: 7.1 p/cc Temp: 78600 K Bz: -3 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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Haymarket NSW 1240 AUSTRALIA FTP: ftp://ftp-out.sws.bom.gov.au
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