[Ips-dsgr] ASWFC Daily Report - 10 June 26 issued 2330 UT on 10 Jun 2026 [SEC=OFFICIAL]
Australian Space Weather Forecasting Centre
aswfc at bom.gov.au
Thu Jun 11 09:30:52 AEST 2026
SUBJ: ASWFC DAILY SOLAR AND GEOPHYSICAL REPORT
ISSUED AT 2330UT/10 JUNE 2026
FROM THE AUSTRALIAN SPACE WEATHER FORECASTING CENTRE
SUMMARY FOR 10 JUNE AND FORECAST FOR 11 JUNE - 13 JUNE
STATUS INDICATORS SOL:** YELLOW ** MAG:** YELLOW ** ION: GREEN
ASWAS SCALE DESCRIPTION: https://bit.ly/3lmaMBx
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1A. SOLAR SUMMARY
Activity 10 Jun: R0
Flares: none.
Observed 10.7 cm flux/Equivalent Sunspot Number for 10 Jun: 124/77
1B. SOLAR FORECAST
11 Jun 12 Jun 13 Jun
Activity R0-R1 R0-R1 R0-R1
Fadeouts Possible Possible Possible
10.7cm/SSN 130/84 128/81 128/81
COMMENT: Solar activity on UT day 10-Jun was R0, with no solar
flares. There are currently six numbered sunspots on the solar
disk. Active sunspot region (AR) 4461 (S13W02, beta) has shown
some minor changes throughout the day. All other sunspot regions
are either stable or in decay. Solar activity is expected to
be R0-R1 over 11-13 Jun.
No Earth directed CMEs were observed in available images.
S0 solar radiation storm conditions were observed on UT day 10-Jun.
S0 solar radiation storm conditions are expected over 11-13.
The solar wind environment on UT day 10-Jun was near background levels.
The solar wind speed ranged between 450-360 km/s and is currently steady.
The peak total interplanetary field strength (IMF, Bt) was 7 nT and
the north-south IMF component range (Bz) was +5 to -5 nT. The solar wind speed
is expected to begin increasing by either late 11-Jun or else
on 12-Jun due to a recurring coronal hole.
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2A. MAGNETIC SUMMARY
Geomagnetic field for Australian Region 10 Jun: G0
Estimated Indices 10 Jun : A K
Australian Region 3 11023001
Cocos Island 2 01021110
Darwin 4 11023111
Townsville 4 11023111
Learmonth 5 11123111
Alice Springs 3 01023000
Gingin 3 10123001
Canberra 4 10033001
Kennaook Cape Grim 6 11034001
Hobart 6 11034000
Estimated Antarctic Regional K Indices 10 Jun :
Macquarie Island 17 01256000
Casey 7 22233101
Mawson 8 22222114
Observed Regional daily pc3 Indices 10 Jun :
Darwin 17 (Quiet)
Townsville 0 (Quiet)
Learmonth 7 (Quiet)
Alice Springs 0 (Quiet)
Gingin 51 (Unsettled)
Canberra 52 (Unsettled)
Hobart 33 (Quiet to unsettled)
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 10 Jun : A
Fredericksburg 7
Planetary 8
Observed AFr/Ap Indices 09 Jun : A K
Fredericksburg 10
Planetary 11 2222 3333
2B. MAGNETIC FORECAST
Date Ap Conditions
11 Jun 17 G0
12 Jun 25 G1, chance G2
13 Jun 25 G1, chance G2
COMMENT: G0 geomagnetic conditions were observed in the Australian
region on UT day 10-Jun. G0-G2 geomagnetic conditions were observed
in the Antarctic region. Mostly G0 geomagnetic conditions are
expected on 11-Jun, then G0-G1 with a chance of G2 over 12-13
Jun due to anticipated entry into a recurrent coronal hole by
late 11-Jun at the earliest.
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3A. GLOBAL HF PROPAGATION SUMMARY
Latitude Band
Date Low Middle High
10 Jun Normal-fair Normal-fair Normal-fair
PCA Event : No event.
3B. GLOBAL HF PROPAGATION FORECAST
Latitude Band
Date Low Middle High
11 Jun Normal Normal Normal-fair
12 Jun Normal-fair Normal-fair Fair
13 Jun Normal-fair Normal-fair Fair
COMMENT: HF radio propagation condition on UT day 10-Jun were
mostly normal, with some mild degradations throughout the globe.
HF radio propagation conditions are expected to be mostly normal
on 11-Jun, becoming mildly to moderately degraded over 12-13
Jun due to anticipated geomagnetic activity from a coronal hole.
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4A. AUSTRALIAN REGION IONOSPHERIC SUMMARY
Date T index
10 Jun 78
Observed Australian Regional MUFs
Cocos Island Region:
No data available during local day.
No data available during local night.
Niue Island Region:
Enhanced by 30% during local day.
Near predicted monthly values during local night.
Northern Australian Region:
Near predicted monthly values.
Southern Australian Region:
Near predicted monthly values.
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
11 Jun 85 Near predicted monthly values to 15% enhanced
12 Jun 80 Near predicted monthly values
13 Jun 70 Near predicted monthly values to 15% depressed
COMMENT: Maximum usable frequencies (MUFs) in the Australian
region were near predicted values on UT day 10-Jun. Sporadic-E
was observed in Learmonth and Canberra overnight and spread-F
in Hobart. MUFs are expected to be near predicted values to 15%
enhanced on 11-Jun, but trending to near predicted values on
12-Jun and up to 15% depressed by 13-Jun due to anticipated geomagnetic
activity from a coronal hole.
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5. SPACE ENVIRONMENT SUMMARY
GOES satellite data for 09 Jun
Daily Proton Fluence >1 MeV: 9.0E+05
Daily Proton Fluence >10 MeV: 2.0E+04
Daily Electron Fluence >2 MeV: 9.70E+07 (normal fluence)
Electron Fluence Daily Deep Dielectric Discharge Probability:10%
Fluence (flux accumulation over 24hrs)/ cm2-ster-day.
X-ray background: B7.4
DSCOVR Satellite Solar Wind Day Averaged Data for 09 Jun
Speed: 443 km/sec Density: 3.2 p/cc Temp: 56600 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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