[Ips-dsgr] ASWFC Daily Report - 09 June 26 issued 2334 UT on 09 Jun 2026 [SEC=OFFICIAL]
Australian Space Weather Forecasting Centre
aswfc at bom.gov.au
Wed Jun 10 09:34:03 AEST 2026
SUBJ: ASWFC DAILY SOLAR AND GEOPHYSICAL REPORT
ISSUED AT 2330UT/09 JUNE 2026
FROM THE AUSTRALIAN SPACE WEATHER FORECASTING CENTRE
SUMMARY FOR 09 JUNE AND FORECAST FOR 10 JUNE - 12 JUNE
STATUS INDICATORS SOL:** YELLOW ** MAG:** YELLOW ** ION: GREEN
ASWAS SCALE DESCRIPTION: https://bit.ly/3lmaMBx
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1A. SOLAR SUMMARY
Activity 09 Jun: R0
Flares: none.
Observed 10.7 cm flux/Equivalent Sunspot Number for 09 Jun: 130/84
1B. SOLAR FORECAST
10 Jun 11 Jun 12 Jun
Activity R0-R1 R0-R1 R0-R1
Fadeouts Possible Possible Possible
10.7cm/SSN 130/84 130/84 128/81
COMMENT: Solar flare activity on UT day 09-Jun was at the R0
level with no flares above the C5.0 level. There are seven numbered
active regions (ARs) visible on the solar disk and one unnumbered
region. ARs 4464 (S13E13, beta) and newly numbered 4466 (N04W17,
beta-gamma) showed spot development over the UT day. AR 4465
(N11E58, beta-gamma) was stable but responsible for the largest
C-class flares observed on 09-Jun. Both ARs 4465 and 4466 have
beta-gamma magnetic complexity, all other numbered regions are
magnetically simple. A new region has developed on the solar
disk at around S07E09 with beta magnetic complexity. All other
regions are either stable or in decay. Solar activity over 10-12
Jun is expected to be at R0-R1 levels. S0 solar radiation storm
conditions were observed on UT day 09-Jun. S0 solar radiation
storm conditions are expected over 10-12 Jun. An east directed
CME is visible in SOHO and STEREO-A imagery from 09/1648UT. This
event is seemingly associated with an eruption on disk, visible
in SDO, GOES SUVI and H-Alpha imagery from 09/1548UT at around
N11E12. A lack of recent imagery makes analysing this CME difficult,
however MODEL A west directed partial halo CME is visible in
SOHO imagery from 09/2112UT. This event is seemingly associated
with an eruption on disk, visible in SDO, GOES SUVI and H-Alpha
imagery from 09/1909UT at around S30W10. A lack of recent imagery
makes analysing this CME difficult. The solar wind speed was
steady over the UT day 09-Jun with wind speeds mostly ranging
between 500 and 400 m/s. The wind speed is currently at around
440 km/s. A CME impact signature was detected in the IMF at around
09/1000UT. This is likely due to the late arrival of a CME first
observed on 06-Jun. The peak total interplanetary field strength
(IMF, Bt) was 10 nT and the north-south IMF component range (Bz)
was +7 to -8 nT. The solar wind is expected to remain around
current levels on 10-Jun. An increase is expected over 11-12
Jun due to high speed wind stream effects from an equatorial
coronal hole currently approaching a geoeffective position.
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2A. MAGNETIC SUMMARY
Geomagnetic field for Australian Region 09 Jun: G0
Estimated Indices 09 Jun : A K
Australian Region 6 11122232
Cocos Island 4 11112221
Darwin 6 11122232
Townsville 7 12122232
Learmonth 5 12------
Alice Springs 6 11122232
Gingin 8 11223232
Canberra 6 11122232
Kennaook Cape Grim 7 11123232
Hobart 7 11123232
Estimated Antarctic Regional K Indices 09 Jun :
Macquarie Island 8 11113332
Casey 7 22232221
Mawson 30 54333364
Observed Regional daily pc3 Indices 09 Jun :
Darwin 0 (Quiet)
Townsville 0 (Quiet)
Learmonth 9 (Quiet)
Alice Springs 0 (Quiet)
Gingin 0 (Quiet)
Canberra 0 (Quiet)
Hobart 6 (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 09 Jun : A
Fredericksburg 10
Planetary 12
Observed AFr/Ap Indices 08 Jun : A K
Fredericksburg 9
Planetary 8 1233 2112
2B. MAGNETIC FORECAST
Date Ap Conditions
10 Jun 10 G0
11 Jun 20 G1, chance of G2
12 Jun 25 G1, chance of G2
COMMENT: G0 geomagnetic conditions were observed in the Australian
region and at the planetary level on UT day 09-Jun. Mostly G0
geomagnetic conditions were observed in the Antarctic region,
with G2 conditions observed at Mawson. G0 geomagnetic conditions
are expected on 10-Jun. G1 conditions, with a chance of G2 are
expected over 11-12 Jun due to high speed wind stream effects
from a coronal hole currently rotating towards a geoeffective
location.
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3A. GLOBAL HF PROPAGATION SUMMARY
Latitude Band
Date Low Middle High
09 Jun Normal Normal Normal-fair
PCA Event : No event.
3B. GLOBAL HF PROPAGATION FORECAST
Latitude Band
Date Low Middle High
10 Jun Normal Normal Normal-fair
11 Jun Normal Normal-fair Fair
12 Jun Fair Fair Fair-poor
COMMENT: HF radio propagation conditions on UT day 09-Jun were
mostly normal, with some degradations in the northern hemisphere.
HF radio propagation conditions are expected to be mostly normal
on 10-Jun, with mild degradations possible over 11-12 Jun if
geomagnetic activity eventuates following the arrival of a coronal
hole high speed wind stream on 11-Jun.
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4A. AUSTRALIAN REGION IONOSPHERIC SUMMARY
Date T index
09 Jun 68
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.
Northern Australian Region:
Mostly 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
10 Jun 75 Near predicted monthly values
11 Jun 70 Near predicted monthly values
12 Jun 60 Near predicted monthly values
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 monthly values.
Spread F was observed at Hobart and Canberra during local night
hours. MUFs are expected to be mostly near predicted monthly
values over 10-12 Jun, with a chance of depressions on 11-12
Jun if geomagnetic activity eventuates following the arrival
of a coronal hole high speed wind stream on 11-Jun.
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5. SPACE ENVIRONMENT SUMMARY
GOES satellite data for 08 Jun
Daily Proton Fluence >1 MeV: 9.7E+05
Daily Proton Fluence >10 MeV: 2.3E+04
Daily Electron Fluence >2 MeV: 6.00E+07 (normal fluence)
Electron Fluence Daily Deep Dielectric Discharge Probability: 8%
Fluence (flux accumulation over 24hrs)/ cm2-ster-day.
X-ray background: B7.9
DSCOVR Satellite Solar Wind Day Averaged Data for 08 Jun
Speed: 481 km/sec Density: 1.0 p/cc Temp: 77800 K Bz: -2 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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