[Ips-dsgr] ASWFC Daily Report - 07 June 26 issued 2330 UT on 07 Jun 2026 [SEC=OFFICIAL]
Australian Space Weather Forecasting Centre
aswfc at bom.gov.au
Mon Jun 8 09:30:48 AEST 2026
SUBJ: ASWFC DAILY SOLAR AND GEOPHYSICAL REPORT
ISSUED AT 2330UT/07 JUNE 2026
FROM THE AUSTRALIAN SPACE WEATHER FORECASTING CENTRE
SUMMARY FOR 07 JUNE AND FORECAST FOR 08 JUNE - 10 JUNE
STATUS INDICATORS SOL:** YELLOW ** MAG:** RED ** ION: GREEN
ASWAS SCALE DESCRIPTION: https://bit.ly/3lmaMBx
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1A. SOLAR SUMMARY
Activity 07 Jun: R0
Flares: none.
Observed 10.7 cm flux/Equivalent Sunspot Number for 07 Jun: 134/88
1B. SOLAR FORECAST
08 Jun 09 Jun 10 Jun
Activity R0-R1 R0-R1 R0-R1
Fadeouts Possible Possible Possible
10.7cm/SSN 135/89 132/86 130/84
COMMENT: Solar activity on UT day 7-Jun was R0, with no solar
flares. Active sunspot region (AR) 4464 (S13E39, beta) has grown
over the past day, but all other sunspot regions have either
stabilised or began to decay. Solar activity over 8-10 Jun is
expected to be R0-R1.
No Earth directed CMEs were observed on UT day 7-Jun.
S0 solar radiation storm conditions were observed on UT day 7-Jun.
The >10 MeV protons are currently enhanced but under 1 pfu, but
may observe a small increase by the middle of the day due to an
anticipated CME arrival. S0 solar radiation storm conditions are
expected over 8-10 Jun.
The solar wind environment on UT day 7-Jun was near background
levels. The solar wind speed ranged between 600-500 km/s and is
currently on a slow decline. The peak total interplanetary field
strength (IMF, Bt) was 5 nT and the north-south IMF component
range (Bz) was +4 to -4 nT. The solar wind environment is expected
to become disturbed by mid 8-Jun UT day due to a CME that is expected
to arrive from 1300 UT +/- 10 hours. This disturbance is expected to
continue into 9-Jun, with conditions returning to background levels by
10-Jun.
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2A. MAGNETIC SUMMARY
Geomagnetic field for Australian Region 07 Jun: G0
Estimated Indices 07 Jun : A K
Australian Region 5 21221211
Cocos Island 3 20120200
Darwin 4 21221201
Townsville 5 21221211
Learmonth 7 21231311
Alice Springs 4 21221210
Gingin 7 21231311
Canberra 4 21221200
Kennaook Cape Grim 6 21231211
Hobart 5 11131211
Estimated Antarctic Regional K Indices 07 Jun :
Macquarie Island 7 21141300
Casey 10 33331311
Mawson 14 33343223
Observed Regional daily pc3 Indices 07 Jun :
Darwin 0 (Quiet)
Townsville 0 (Quiet)
Learmonth 0 (Quiet)
Alice Springs 0 (Quiet)
Gingin 0 (Quiet)
Canberra 2 (Quiet)
Hobart 2 (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 07 Jun : A
Fredericksburg 8
Planetary 9
Observed AFr/Ap Indices 06 Jun : A K
Fredericksburg 19
Planetary 17 4443 322-
2B. MAGNETIC FORECAST
Date Ap Conditions
08 Jun 40 G2-G3
09 Jun 30 G1-G2
10 Jun 14 G0
COMMENT: ASWFC Geomagnetic Warning 36 was issued on 6 June and
is current for 8-9 Jun. G0 geomagnetic conditions were observed
in the Australian region on UT day 7-Jun. G0 geomagnetic conditions
were observed in the Antarctic region. G2-G3 geomagnetic conditions
are expected from mid 8-Jun UT day due to an expected CME arrival
from 1300 UT. Impacts are expected to continue into 9-Jun and
G1-G2 conditions are expected on this day. Mostly G0 geomagnetic
conditions are expected by 10-Jun.
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3A. GLOBAL HF PROPAGATION SUMMARY
Latitude Band
Date Low Middle High
07 Jun Normal-fair Normal Normal-fair
PCA Event : No event.
3B. GLOBAL HF PROPAGATION FORECAST
Latitude Band
Date Low Middle High
08 Jun Normal Normal-fair Normal-fair
09 Jun Normal-fair Fair Fair
10 Jun Normal-fair Normal-fair Normal-fair
COMMENT: HF radio propagation conditions on UT day 7-Jun were
mostly normal, with some mild degradations in the southern hemisphere.
HF radio propagation conditions are expected to be normal for
the first half of UT day 8-Jun, before becoming degraded due
to anticipated geomagnetic activity. Conditions are likely to
be degraded on 9-Jun, but mostly recovered by 10-Jun.
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4A. AUSTRALIAN REGION IONOSPHERIC SUMMARY
Date T index
07 Jun 93
Observed Australian Regional MUFs
Cocos Island Region:
No data available during local day.
No data available during local night.
Niue Island Region:
Near predicted monthly values during local day.
Depressed by 20% during local night.
Enhanced by 30% after local dawn.
Northern Australian Region:
Enhanced by 15% during local day.
Enhanced by 15% during local night.
Southern Australian Region:
Near predicted monthly values during local day.
Enhanced by 20% during local night.
Antarctic Region (Casey/Davis/Mawson):
Near predicted monthly values over the UT day.
Monthly T index:
Month T index
May 67
Jun 68
Jul 65
4B. AUSTRALIAN REGION IONOSPHERIC FORECAST
Date T index MUFs
08 Jun 85 Handed by 15% to near predicted monthly values
09 Jun 70 Near predicted monthly values to 10-15% depressed
10 Jun 90 Near predicted monthly values to 10-15% depressed
COMMENT: ASWFC Preliminary HF Communications Warning 53 was issued
on 6 June and is current for 8-10 Jun. Maximum usable frequencies
(MUFs) in the Australian region were near predicted values to
20% enhanced. Spread-F was observed in Hobart during local night
hours and sporadic-E with degraded signal with observed in Learmonth
during local night hours. MUFs are expected to be enhanced by
15% for most of 8-Jun, trending to near predicted values towards
the end of the day. Mild depressed of 10-15% are possible over
9-10 Jun. Spread-F is possible during local night hours over
9-10 Jun.
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5. SPACE ENVIRONMENT SUMMARY
GOES satellite data for 06 Jun
Daily Proton Fluence >1 MeV: 5.0E+05
Daily Proton Fluence >10 MeV: 3.3E+04
Daily Electron Fluence >2 MeV: 3.70E+07 (normal fluence)
Electron Fluence Daily Deep Dielectric Discharge Probability: 5%
Fluence (flux accumulation over 24hrs)/ cm2-ster-day.
X-ray background: B9.9
DSCOVR Satellite Solar Wind Day Averaged Data for 06 Jun
Speed: 586 km/sec Density: 1.1 p/cc Temp: 153000 K Bz: -1 nT
(Courtesy Space Weather Prediction Center, Boulder USA)
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Australian Space Weather Forecasting Centre
Bureau of Meteorology
ASWFC at bom.gov.au
www.bom.gov.au | www.sws.bom.gov.au
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