[Ips-dsgr] ASWFC Daily Report - 06 July 25 issued 2332 UT on 06 Jul 2025 [SEC=OFFICIAL]
Australian Space Weather Forecasting Centre
aswfc at bom.gov.au
Mon Jul 7 09:32:07 AEST 2025
SUBJ: ASWFC DAILY SOLAR AND GEOPHYSICAL REPORT
ISSUED AT 2330UT/06 JULY 2025
FROM THE AUSTRALIAN SPACE WEATHER FORECASTING CENTRE
SUMMARY FOR 06 JULY AND FORECAST FOR 07 JULY - 09 JULY
STATUS INDICATORS SOL:GREEN MAG:GREEN ION: GREEN
ASWAS SCALE DESCRIPTION: https://bit.ly/3lmaMBx
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1A. SOLAR SUMMARY
Activity 06 Jul: R0
Flares: none.
Observed 10.7 cm flux/Equivalent Sunspot Number for 06 Jul: 118/70
1B. SOLAR FORECAST
07 Jul 08 Jul 09 Jul
Activity R0 R0 R0
Fadeouts None expected None expected None expected
10.7cm/SSN 115/66 113/64 111/62
COMMENT: Solar activity on UT day 6-Jul was R0, with no solar
flares. There are currently five numbered sunspot regions on
the solar disk. AR 4127 (S22W58, beta), AR4130 (S14W10, beta)
and AR4132 (S25W14, beta) have all shown some minor growth over
the past day but overall all visible sunspots are small and not
showing significant potential for solar flares. Solar activity
is expected to be R0 over 7-9 Jul.
No Earth directed CMEs were observed on UT day 6-Jul.
S0 solar radiation storm conditions were observed on UT day 6-Jul.
S0 solar radiation storm conditions are expected over 7-9 Jul.
The solar wind environment was mildly disturbed on UT day 6-Jul due
to ongoing coronal hole effects. The solar wind speed ranged from 379
to 472 km/s and is slowly declining. The peak total interplanetary
field strength (IMF, Bt) was 12 nT and the north-south IMF component
range (Bz) was +9 to -10 nT, with several periods of southward Bz. The solar
wind is expected to slowly return to background levels over 7-9
Jul, possibly increasing by the end of the period due to another
small coronal hole.
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2A. MAGNETIC SUMMARY
Geomagnetic field for Australian Region 06 Jul: G0
Estimated Indices 06 Jul : A K
Australian Region 13 33343023
Cocos Island 6 23222012
Darwin 12 33333123
Townsville - --------
Learmonth 12 33333023
Alice Springs 10 33233022
Gingin 12 33243023
Canberra 10 33242012
Kennaook Cape Grim 13 33343023
Hobart 16 33353023
Estimated Antarctic Regional K Indices 06 Jul :
Macquarie Island 23 24364024
Casey 10 33332013
Mawson 48 67434136
Observed Regional daily pc3 Indices 06 Jul :
Darwin 0 (Quiet)
Townsville NA
Learmonth 0 (Quiet)
Alice Springs 0 (Quiet)
Gingin 2 (Quiet)
Canberra 2 (Quiet)
Hobart 8 (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 Jul : A
Fredericksburg 14
Planetary 19
Observed AFr/Ap Indices 05 Jul : A K
Fredericksburg 20
Planetary 20 3334 4333
2B. MAGNETIC FORECAST
Date Ap Conditions
07 Jul 10 G0-G1
08 Jul 8 G0
09 Jul 10 G0
COMMENT: ASWFC Geomagnetic Warning 50 was issued on 6 July and
is current for 6-7 Jul. G0 geomagnetic conditions were observed
in the Australian region on UT day 6-Jul. G0-G3 geomagnetic conditions
were observed in the Antarctic region. Average planetary conditions
observed an isolated period of G1. Mostly G0 geomagnetic conditions
are expected over 7-9 Jul. An isolated period of G1 is possible on
7-Jul.
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3A. GLOBAL HF PROPAGATION SUMMARY
Latitude Band
Date Low Middle High
06 Jul Fair Normal-fair Normal-fair
PCA Event : No event.
3B. GLOBAL HF PROPAGATION FORECAST
Latitude Band
Date Low Middle High
07 Jul Normal-fair Normal-fair Normal-fair
08 Jul Normal Normal Normal-fair
09 Jul Normal-fair Normal-fair Normal-fair
COMMENT: HF radio propagation conditions on UT day 6-Jul were
normal to mildly degraded due to ongoing coronal hole effects.
HF radio propagation conditions are expected to be mostly normal
to mildly degraded on 7-Jul, trending to more normal on 8-Jul,
then possibly becoming degraded late on 9-Jul due to further
coronal hole effects.
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4A. AUSTRALIAN REGION IONOSPHERIC SUMMARY
Date T index
06 Jul 86
Observed Australian Regional MUFs
Cocos Island Region:
Near predicted monthly values during local day.
Depressed by 40% during local night.
Depressed by 25% after local dawn.
Niue Island Region:
Depressed by 15% during local day.
Depressed by 15% during local night.
Northern Australian Region:
Near predicted monthly values during local day.
Depressed by 25% during local night.
Depressed by 25% after local dawn.
Southern Australian Region:
Near predicted monthly values during local day.
Depressed by 20% during local night.
Antarctic Region (Casey/Davis/Mawson):
Depressed by 25% over the UT day.
Monthly T index:
Month T index
Jun 79
Jul 104
Aug 102
4B. AUSTRALIAN REGION IONOSPHERIC FORECAST
Date T index MUFs
07 Jul 90 Near predicted monthly values to 15% depressed
08 Jul 90 Near predicted monthly values to 15% depressed
09 Jul 95 Near predicted monthly values
COMMENT: Maximum usable frequencies (MUFs) in the Australian
region on UT day 6-Jul were near predicted values to 25% depressed.
Conditions were heavily degraded in the northern regions during
local dawn hours. Spread-F was observed at Hobart during local
night hours. MUFs are expected to be near predicted values to
15% depressed over 7-8 Jul, improving by 9-Jul.
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5. SPACE ENVIRONMENT SUMMARY
GOES satellite data for 05 Jul
Daily Proton Fluence >1 MeV: 1.5E+06
Daily Proton Fluence >10 MeV: 1.6E+04
Daily Electron Fluence >2 MeV: 1.40E+07 (normal fluence)
Electron Fluence Daily Deep Dielectric Discharge Probability: 3%
Fluence (flux accumulation over 24hrs)/ cm2-ster-day.
X-ray background: B4.6
DSCOVR Satellite Solar Wind Day Averaged Data for 05 Jul
Speed: 434 km/sec Density: 4.1 p/cc Temp: 118000 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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