[Ips-dsgr] ASWFC Daily Report - 06 June 26 issued 2330 UT on 06 Jun 2026 [SEC=OFFICIAL]
Australian Space Weather Forecasting Centre
aswfc at bom.gov.au
Sun Jun 7 09:30:39 AEST 2026
SUBJ: ASWFC DAILY SOLAR AND GEOPHYSICAL REPORT
ISSUED AT 2330UT/06 JUNE 2026
FROM THE AUSTRALIAN SPACE WEATHER FORECASTING CENTRE
SUMMARY FOR 06 JUNE AND FORECAST FOR 07 JUNE - 09 JUNE
STATUS INDICATORS SOL:** YELLOW ** MAG:** RED ** ION: GREEN
ASWAS SCALE DESCRIPTION: https://bit.ly/3lmaMBx
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1A. SOLAR SUMMARY
Activity 06 Jun: R1
Flares Max Fadeout Freq. Sectors
M1.8 1402UT possible lower South American/
Atlantic
Observed 10.7 cm flux/Equivalent Sunspot Number for 06 Jun: 138/92
1B. SOLAR FORECAST
07 Jun 08 Jun 09 Jun
Activity R1-R2 R1-R2 R1-R2
Fadeouts Possible Possible Possible
10.7cm/SSN 140/94 138/92 136/90
COMMENT: Solar activity on UT day 6-Jun was R1, with an isolated
M1.8 solar flare from 4161 (S21E20, beta). There are currently
eight numbered sunspot regions on the solar disk. AR4456 (N18W31,
beta-gamma-delta) has grown over the past day and increased in
complexity, although does not contain a dominant leading spot.
AR 4462 (N17E54, beta) has shown some growth but appears to be
maturing. All other sunspot regions are either stable or in decay.
Solar activity is expected to be R1-R2 over 7-9 Jun.
A partial halo CME was associated with the M1.8 solar flare and filament
eruption that erupted from 1411 UT from the southeast solar quadrant.
This CME is expected to arrive from 1300 UT on 8-Jun. No other
CMEs were observed on UT day 6-Jun.
S0 solar radiation storm conditions were observed on UT day 6-Jun,
however associated with the flare event was a rise to the >10 MeV protons
which are currently near 1 pfu. S0 solar radiation storm conditions
are expected over 7-9 Jun.
The solar wind environment on UT day 6-Jun was mostly near background levels,
with recent CME effects having mostly subsided. The solar wind speed ranged
from 560-600 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 -6 nT. The solar wind is expected to be
near background levels on 7-Jun. Due to an expected CME arrival,
the solar wind environment is expected to become disturbed by
mid 8-Jun UT day which may carry into 9-Jun.
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2A. MAGNETIC SUMMARY
Geomagnetic field for Australian Region 06 Jun: G0
Estimated Indices 06 Jun : A K
Australian Region 11 33333221
Cocos Island 8 32323110
Darwin 11 33333121
Townsville 11 33333221
Learmonth 13 33343221
Alice Springs 11 33333220
Gingin 13 33343221
Canberra 10 33332220
Kennaook Cape Grim 13 23443221
Hobart 13 23443221
Estimated Antarctic Regional K Indices 06 Jun :
Macquarie Island 18 33454310
Casey 12 33333312
Mawson 36 56543325
Observed Regional daily pc3 Indices 06 Jun :
Darwin 0 (Quiet)
Townsville 0 (Quiet)
Learmonth 2 (Quiet)
Alice Springs 0 (Quiet)
Gingin 23 (Quiet to unsettled)
Canberra 38 (Quiet to unsettled)
Hobart 18 (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 06 Jun : A
Fredericksburg 17
Planetary 21
Observed AFr/Ap Indices 05 Jun : A K
Fredericksburg 24
Planetary 36 1322 5655
2B. MAGNETIC FORECAST
Date Ap Conditions
07 Jun 11 G0
08 Jun 40 G2-G3
09 Jun 30 G1-G2
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 6-Jun. G0-G2 geomagnetic conditions
were observed in the Antarctic region. G0 geomagnetic conditions
are expected on 7-Jun. From 1300 UT on 8-Jun, geomagnetic conditions
are expected to reach G2-G3 due to the arrival of a CME that
was launched on 6-Jun. G1-G2 geomagnetic conditions are expected
to continue into 9-Jun.
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3A. GLOBAL HF PROPAGATION SUMMARY
Latitude Band
Date Low Middle High
06 Jun Normal-fair Fair Fair
PCA Event : No event.
3B. GLOBAL HF PROPAGATION FORECAST
Latitude Band
Date Low Middle High
07 Jun Normal Normal-fair Normal-fair
08 Jun Normal-fair Normal-fair Fair
09 Jun Fair Normal-fair Fair
COMMENT: HF radio propagation conditions on UT day 6-Jun were
mildly degraded. HF radio propagation conditions are expected
to be mostly normal on 7-Jun, but become degraded by mid 8-Jun
and into 9-Jun.
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4A. AUSTRALIAN REGION IONOSPHERIC SUMMARY
Date T index
06 Jun 93
Observed Australian Regional MUFs
Cocos Island Region:
No data available during local day.
No data available during local night.
Niue Island Region:
Enhanced by 20% during local day.
Enhanced by 15% during local night.
Northern Australian Region:
Near predicted monthly values.
Southern Australian Region:
Near predicted monthly values during local day.
Enhanced by 15% 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
07 Jun 90 Near predicted monthly values to 10% depressed
08 Jun 75 Near predicted monthly values to 20% depressed
09 Jun 70 Near predicted monthly values to 20% 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 on UT day 6-Jun were mostly near
predicted values to 15% enhanced, although conditions were degraded.
Conditions in Darwin were degraded during local night hours,
and spread-F and sporadic-E were present during local night hours
in Hobart, Learmonth and Townsville. MUFs are expected to be
near predicted values on 7-Jun to 10% depressed. MUFs are expected
to be near predicted values for most of 8-Jun, but begin depressing
by the end of the day and into 9-Jun by up to 20%.
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5. SPACE ENVIRONMENT SUMMARY
GOES satellite data for 05 Jun
Daily Proton Fluence >1 MeV: 2.0E+06
Daily Proton Fluence >10 MeV: 1.7E+04
Daily Electron Fluence >2 MeV: 1.70E+07 (normal fluence)
Electron Fluence Daily Deep Dielectric Discharge Probability: 3%
Fluence (flux accumulation over 24hrs)/ cm2-ster-day.
X-ray background: B9.3
DSCOVR Satellite Solar Wind Day Averaged Data for 05 Jun
Speed: 547 km/sec Density: 3.2 p/cc Temp: 243000 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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