[Ips-dsgr] SWS Daily Report - 27 June 20 issued 2331 UT on 27 Jun 2020
Regional Warning Centre
rwc at ips.gov.au
Sun Jun 28 09:31:25 EST 2020
SUBJ: SWS DAILY SOLAR AND GEOPHYSICAL REPORT
ISSUED AT 2330UT/27 JUNE 2020 BY Space Weather Services
FROM THE AUSTRALIAN SPACE FORECAST CENTRE
SUMMARY FOR 27 JUNE AND FORECAST FOR 28 JUNE - 30 JUNE
STATUS INDICATORS SOL:GREEN MAG:GREEN ION: GREEN
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1A. SOLAR SUMMARY
Activity 27 Jun: Very low
Flares: none.
Observed 10.7 cm flux/Equivalent Sunspot Number for 27 Jun: 69/3
1B. SOLAR FORECAST
28 Jun 29 Jun 30 Jun
Activity Very low Very low Very low
Fadeouts None expected None expected None expected
10.7cm/SSN 68/2 68/2 68/2
COMMENT: Solar activity was very low on UT day 27 June. There
are currently no numbered regions on the visible solar disc.
Very low solar activity is expected for the next three UT days,
28-30 June. No Earthward directed CMEs were observed in the available
coronagraph images. During UT day 27 June, the solar wind speed
was near its background level till 27/1000 UT and from thereon
increased to mildly elevated level in response to a possible
small patchy coronal hole effect. The solar wind speed at the
time of writing this report was near 370 km/s. The total IMF
(Bt) varied between 2-11 nT and the north-south IMF component
(Bz) varied between +9/-6 nT. The outlook for today, UT day 28
June, is for the solar wind speed to vary from background to
mildly enhanced level as the minor coronal hole effect persists.
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2A. MAGNETIC SUMMARY
Geomagnetic field for Australian Region 27 Jun: Quiet
Estimated Indices 27 Jun : A K
Australian Region 4 21222001
Cocos Island 3 21112001
Darwin 5 21223001
Townsville 5 22223001
Learmonth 4 22122002
Alice Springs 4 21222001
Gingin 3 21112002
Canberra 3 11222000
Hobart 4 21222001
Estimated Antarctic Regional K Indices 27 Jun :
Macquarie Island 3 11231000
Casey 6 22222112
Mawson 21 52332006
Observed Regional daily pc3 Indices 27 Jun :
Darwin 0 (Quiet)
Townsville 0 (Quiet)
Learmonth 0 (Quiet)
Alice Springs 0 (Quiet)
Gingin 0 (Quiet)
Canberra 4 (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 27 Jun : A
Fredericksburg 6
Planetary 7
Observed AFr/Ap Indices 26 Jun : A K
Fredericksburg 6
Planetary 6 2011 1123
2B. MAGNETIC FORECAST
Date Ap Conditions
28 Jun 5 Quiet
29 Jun 5 Quiet
30 Jun 5 Quiet
COMMENT: On UT day 27 June, geomagnetic conditions were quiet
in the Australian region. Mostly quiet conditions with isolated
disturbed periods were observed in the Antarctic region. Global
geomagnetic activity is expected to be mostly quiet for the next
three UT days, 28-30 June, with a chance of isolated unsettled
periods due to minor coronal hole effects.
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3A. GLOBAL HF PROPAGATION SUMMARY
Latitude Band
Date Low Middle High
27 Jun Normal Normal Normal
PCA Event : No event.
3B. GLOBAL HF PROPAGATION FORECAST
Latitude Band
Date Low Middle High
28 Jun Normal Normal Normal
29 Jun Normal Normal Normal
30 Jun Normal Normal Normal
COMMENT: Mostly normal HF conditions are expected for the next
three UT days, 28-30 June.
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4A. AUSTRALIAN REGION IONOSPHERIC SUMMARY
Date T index
27 Jun 6
Observed Australian Regional MUFs
Cocos Island Region:
No data available.
Niue Island Region:
Near predicted monthly values during local day.
Enhanced by 20% during local night.
Northern Australian Region:
Near predicted monthly values during local day.
Enhanced by 25% during local night.
Southern Australian Region:
Near predicted monthly values during local day.
Enhanced by 70% during local night.
Enhanced by 20% after local dawn.
Antarctic Region (Casey/Scott Base/Davis/Mawson):
Enhanced by 30% over the UT day.
Monthly T index:
Month T index
May 1
Jun -12
Jul -13
4B. AUSTRALIAN REGION IONOSPHERIC FORECAST
Date T index MUFs
28 Jun 0 Near predicted monthly values
29 Jun 0 Near predicted monthly values
30 Jun 0 Near predicted monthly values
COMMENT: MUFs were near monthly predicted to moderately enhanced
levels on UT day 27 June. The enhancements were observed mostly
during local night. Sporadic E and spread F were observed at
times over some Australian sites. MUFs in the Australian region
are expected to be mostly near monthly predicted to mildly enhanced
levels for the next three UT days, 28-30 June.
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5. SPACE ENVIRONMENT SUMMARY
GOES satellite data for 26 Jun
Daily Proton Fluence >1 MeV: 9.2E+04
Daily Proton Fluence >10 MeV: 4.7E+04
Daily Electron Fluence >2 MeV: 1.30E+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 26 Jun
Speed: 335 km/sec Density: 2.4 p/cc Temp: 33800 K Bz: -2 nT
(Courtesy Space Weather Prediction Center, Boulder USA)
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