[Ips-dsgr] SWS Daily Report - 01 June 20 issued 2331 UT on 01 Jun 2020
Regional Warning Centre
rwc at ips.gov.au
Tue Jun 2 09:31:20 EST 2020
SUBJ: SWS DAILY SOLAR AND GEOPHYSICAL REPORT
ISSUED AT 2330UT/01 JUNE 2020 BY Space Weather Services
FROM THE AUSTRALIAN SPACE FORECAST CENTRE
SUMMARY FOR 01 JUNE AND FORECAST FOR 02 JUNE - 04 JUNE
STATUS INDICATORS SOL:GREEN MAG:GREEN ION: GREEN
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1A. SOLAR SUMMARY
Activity 01 Jun: Very low
Flares: none.
Observed 10.7 cm flux/Equivalent Sunspot Number for 01 Jun: 69/3
1B. SOLAR FORECAST
02 Jun 03 Jun 04 Jun
Activity Very low to low Very low to low Very low to low
Fadeouts None expected None expected None expected
10.7cm/SSN 70/5 72/8 72/8
COMMENT: Solar activity was very low on UT day 01 June. There
is one numbered active region on the visible disc, AR 2764. No
Earthward directed CMEs were observed in the available coronagraph
images. Very low levels of solar activity with a chance of isolated
C-class flares are expected for the next three UT days, 02-04
June. During UT day 01 June, the solar wind speed varied in the
range 330-420 km/s. The total IMF (Bt) varied between 2 nT and
14 nT, and the north-south IMF component (Bz) varied mostly in
the range +11/-13 nT. The solar wind speed is expected to vary
between its background level and moderately enhanced values during
UT days 02-04 June.
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2A. MAGNETIC SUMMARY
Geomagnetic field for Australian Region 01 Jun: Quiet
Estimated Indices 01 Jun : A K
Australian Region 2 11000122
Cocos Island 2 00000122
Darwin 2 11000122
Townsville 3 11100122
Learmonth 3 11000123
Alice Springs 2 11000022
Gingin 3 01000123
Canberra 1 00000112
Hobart 2 11010112
Estimated Antarctic Regional K Indices 01 Jun :
Macquarie Island 1 00020011
Casey 4 12110113
Mawson 24 23310137
Observed Regional daily pc3 Indices 01 Jun :
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 01 Jun : A
Fredericksburg 4
Planetary 5
Observed AFr/Ap Indices 31 May : A K
Fredericksburg 4
Planetary 3 2100 1101
2B. MAGNETIC FORECAST
Date Ap Conditions
02 Jun 7 Quiet
03 Jun 7 Quiet
04 Jun 7 Quiet
COMMENT: Geomagnetic conditions in the Australian region were
quiet on UT day 01 June. The Antarctic region observed mostly
quiet to unsettled conditions. Global geomagnetic activity is
expected to be mostly quiet with a chance of isolated unsettled
periods for UT days 02-04 June.
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3A. GLOBAL HF PROPAGATION SUMMARY
Latitude Band
Date Low Middle High
01 Jun Normal Normal Normal-fair
PCA Event : No event.
3B. GLOBAL HF PROPAGATION FORECAST
Latitude Band
Date Low Middle High
02 Jun Normal Normal Normal-fair
03 Jun Normal Normal Normal-fair
04 Jun Normal Normal Normal-fair
COMMENT: During UT day 01 June, MUFs were mostly near predicted
values with mild to moderate enhancements in the Southern Hemisphere
and varied between the predicted values and moderately depressed
levels in the Northern Hemisphere. For the next three UT days,
02-04 June, similar HF propagation conditions are expected, gradually
approaching mostly normal conditions.
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4A. AUSTRALIAN REGION IONOSPHERIC SUMMARY
Date T index
01 Jun 2
Observed Australian Regional MUFs
Cocos Island Region:
Enhanced by 15% during local day.
Near predicted monthly values during local night.
Niue Island Region:
Near predicted monthly values during local day.
Enhanced by 40% 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 35% during local night.
Enhanced by 25% after local dawn.
Antarctic Region (Casey/Scott Base/Davis/Mawson):
Near predicted monthly values 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
02 Jun 0 Near predicted monthly values
03 Jun -5 Near predicted monthly values
04 Jun -5 Near predicted monthly values
COMMENT: MUFs were mostly near predicted values with mild to
moderate enhancements in the Australian region on UT day 01 June.
Sporadic E was observed over some sites. MUFs in the Australian
region are expected to stay mostly at normal levels for the next
three UT days, 02-04 June.
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5. SPACE ENVIRONMENT SUMMARY
GOES satellite data for 31 May
Daily Proton Fluence >1 MeV: 5.4E+04
Daily Proton Fluence >10 MeV: 4.6E+04
Daily Electron Fluence >2 MeV: 1.20E+06 (normal fluence)
Electron Fluence Daily Deep Dielectric Discharge Probability: 1%
Fluence (flux accumulation over 24hrs)/ cm2-ster-day.
X-ray background: A1.3
DSCOVR Satellite Solar Wind Day Averaged Data for 31 May
Speed: 392 km/sec Density: 4.5 p/cc Temp: 54800 K Bz: 1 nT
(Courtesy Space Weather Prediction Center, Boulder USA)
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Space Weather Services email: asfc at bom.gov.au
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