[Ips-dsgr] ASWFC Daily Report - 30 June 26 issued 2331 UT on 30 Jun 2026 [SEC=OFFICIAL]
Australian Space Weather Forecasting Centre
aswfc at bom.gov.au
Wed Jul 1 09:31:34 AEST 2026
SUBJ: ASWFC DAILY SOLAR AND GEOPHYSICAL REPORT
ISSUED AT 2330UT/30 JUNE 2026
FROM THE AUSTRALIAN SPACE WEATHER FORECASTING CENTRE
SUMMARY FOR 30 JUNE AND FORECAST FOR 01 JULY - 03 JULY
STATUS INDICATORS SOL:** RED ** MAG:** YELLOW ** ION: GREEN
ASWAS SCALE DESCRIPTION: https://bit.ly/3lmaMBx
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1A. SOLAR SUMMARY
Activity 30 Jun: R3
Flares: none.
Observed 10.7 cm flux/Equivalent Sunspot Number for 30 Jun: 203/154
1B. SOLAR FORECAST
01 Jul 02 Jul 03 Jul
Activity R1-R2, chance R3 R1-R2 R1-R2
Fadeouts Probable Possible Possible
10.7cm/SSN 205/156 205/156 200/152
COMMENT: Solar flare activity on UT day 30-Jun reached R3, with
an X1.1 solar flare that peaked at 20:50 UT from active sunspot
region AR 4479 (N17W23, beta-gamma-delta). An R2 event was also
observed reaching M5.8 during to two simultaneous solar flares.
There are currently five numbered sunspots on the solar disk.
Active region (AR) 4475 (S08W61, beta) was responsible for a
majority of the day's flaring activity, but has shown only minor
changes over the past day. AR 4478 (S06W05, beta-gamma-delta)
remains the largest region, and continues to increase in size,
but has not increased in overall complexity. AR 4479 has shown
some growth and also contributed to the M5.8 flare event. Other
sunspot regions are stable. Solar flare activity is expected
to be R1-R2 over 1-3 Jul. A chance for further R3 events is
possible on 1-Jul.
No CMEs were observed on UT day 30-Jun. A CME was likely associated
with the X1.1 solar flare event, however there is currently no imagery
available for analysis.
S0 solar radiation storm conditions were observed on UT day 30-Jun.
S0 solar radiation storm conditions are expected over 1-3 Jul.
The solar wind environment on UT day 30-Jun became disturbed
due to an anticipated CME arrival at 11:03 UT. The solar wind
speed ranged from 320 to 420 km/s. The peak total interplanetary
field strength (IMF, Bt) was 15 nT and the north-south IMF component
range (Bz) was +11 to -11 nT with southward IMF conditions from
1533-1700 UT. The solar wind environment is expected to remain
disturbed on 1-Jul due to ongoing CME effects, returning to background
levels over 2-3 Jul.
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2A. MAGNETIC SUMMARY
Geomagnetic field for Australian Region 30 Jun: G0
Estimated Indices 30 Jun : A K
Australian Region 10 01043332
Cocos Island 7 10033322
Darwin 10 11143322
Townsville 12 11143333
Learmonth 15 00153442
Alice Springs 10 01043332
Gingin 11 00033442
Canberra 7 00032332
Kennaook Cape Grim 10 01033432
Hobart 9 01032432
Estimated Antarctic Regional K Indices 30 Jun :
Macquarie Island 8 00012441
Casey 9 11033332
Mawson 25 21043456
Observed Regional daily pc3 Indices 30 Jun :
Darwin NA
Townsville 0 (Quiet)
Learmonth 0 (Quiet)
Alice Springs 0 (Quiet)
Gingin 0 (Quiet)
Canberra 0 (Quiet)
Hobart 0 (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 30 Jun : A
Fredericksburg 12
Planetary 18
Observed AFr/Ap Indices 29 Jun : A K
Fredericksburg 4
Planetary 3 1101 1001
2B. MAGNETIC FORECAST
Date Ap Conditions
01 Jul 16 G0-G1
02 Jul 10 G0
03 Jul 6 G0
COMMENT: ASWFC Geomagnetic Warning 39 was issued on 29 June and
is current for 30 Jun to 1 Jul. G0 geomagnetic conditions were
observed in the Australian region on UT day 30-Jun. G0-G1 geomagnetic
conditions were observed in the Antarctic region. G1 conditions
were observed on the planetary scale. G0-G1 geomagnetic conditions
are expected on 1-Jul due to the arrival of a recent CME from
30/1103 UT whose effects are lingering. G0 geomagnetic conditions
are expected over 2-3 Jul.
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3A. GLOBAL HF PROPAGATION SUMMARY
Latitude Band
Date Low Middle High
30 Jun Normal-fair Normal-fair Normal-fair
PCA Event : No event.
3B. GLOBAL HF PROPAGATION FORECAST
Latitude Band
Date Low Middle High
01 Jul Normal-fair Normal-fair Normal-fair
02 Jul Normal Normal Normal
03 Jul Normal Normal Normal
COMMENT: HF radio propagation conditions were mostly normal,
with some mildly degraded periods in the southern hemisphere.
A shortwave fadeout affecting the Pacific ocean and parts of
the west coast US was observed from 20:40 UT. Some mild degradations
are likely at the beginning of 1-Jul, but otherwise conditions
are expected to be normal over 2-3 Jul.
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4A. AUSTRALIAN REGION IONOSPHERIC SUMMARY
Date T index
30 Jun 75
Observed Australian Regional MUFs
Cocos Island Region:
No data available during local day.
No data available during local night.
Niue Island Region:
Mostly near predicted monthly values.
Enhanced by 35% after local dawn.
Northern Australian Region:
Near predicted monthly values during local day.
Depressed by 15% during local night.
Southern Australian Region:
Mostly near predicted monthly values.
Enhanced by 20% after local dawn.
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
01 Jul 70 Depressed 10 to 15%/near predicted monthly values
02 Jul 80 Near predicted monthly values
03 Jul 85 Near predicted monthly values
COMMENT: ASWFC SWF HF Communications Warning 59 was issued on
30 June and is current for 1-2 Jul. Maximum usable frequencies
(MUFs) in the Australian region on UT day 30-Jun were mostly
near predicted values, with some brief depressions in the north
and brief enhancements in the south. Spread-F was observed along
the eastern coast of Australia during local night hours. A shortwave
fadeout may have affected radio frequencies along the eastern
coast of Australia during local dawn hours. MUFs are expected
to be mostly near predicted monthly values over 1-3 Jul, with
some minor depressions of 15% possible on 1-Jul.
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5. SPACE ENVIRONMENT SUMMARY
GOES satellite data for 29 Jun
Daily Proton Fluence >1 MeV: 7.5E+05
Daily Proton Fluence >10 MeV: 1.9E+04
Daily Electron Fluence >2 MeV: 1.70E+08 (moderate fluence)
Electron Fluence Daily Deep Dielectric Discharge Probability:14%
Fluence (flux accumulation over 24hrs)/ cm2-ster-day.
X-ray background: C1.6
DSCOVR Satellite Solar Wind Day Averaged Data for 29 Jun
Speed: 435 km/sec Density: 1.8 p/cc Temp: 66000 K Bz: 0 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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