[Ips-dsgr] ASWFC Daily Report - 29 June 26 issued 2330 UT on 29 Jun 2026 [SEC=OFFICIAL]
Australian Space Weather Forecasting Centre
aswfc at bom.gov.au
Tue Jun 30 09:30:50 AEST 2026
SUBJ: ASWFC DAILY SOLAR AND GEOPHYSICAL REPORT
ISSUED AT 2330UT/29 JUNE 2026
FROM THE AUSTRALIAN SPACE WEATHER FORECASTING CENTRE
SUMMARY FOR 29 JUNE AND FORECAST FOR 30 JUNE - 02 JULY
STATUS INDICATORS SOL:** YELLOW ** MAG:** YELLOW ** ION: GREEN
ASWAS SCALE DESCRIPTION: https://bit.ly/3lmaMBx
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1A. SOLAR SUMMARY
Activity 29 Jun: R0
Flares Max Fadeout Freq. Sectors
M1.4 2140UT possible lower East Pacific/
North American
Observed 10.7 cm flux/Equivalent Sunspot Number for 29 Jun: 195/147
1B. SOLAR FORECAST
30 Jun 01 Jul 02 Jul
Activity R0-R1 R0-R1 R0-R1
Fadeouts Possible None expected None expected
10.7cm/SSN 190/143 185/138 185/138
COMMENT: Solar flare activity on UT day 29-Jun was R1, with an
isolated M1 flare from active sunspot region (AR) 4479 (N17W09,
beta-gamma-delta). There are currently five numbered sunspot
regions on the solar disk. Active sunspot region (AR) 4478 (S06E10,
beta-gamma-delta) has grown slightly in size but not increased
in complexity. AR 4479 has undergone changes but not increased
in overall complexity. All other sunspot regions are either stable
or in decay. Solar activity is expected to be R0-R1 over 30-Jun
to 2-Jul based on persistence, noting there is potential for
an upgraded forecast in the coming days.
No Earth directed CMEs were observed on UT day 29-Jun.
S0 solar radiation storm conditions were observed on UT day 29-Jun.
S0 solar radiation storm conditions are expected over 30-Jun to 2-Jul.
The solar wind environment on UT day 29-Jun was near background levels.
The solar wind speed ranged between 450 and 330 km/s. The peak total
interplanetary field strength (IMF, Bt) was 3 nT and the north-south
IMF component range (Bz) was +2 to -2 nT. The solar wind environment may
become briefly disturbed on 30-Jun due to a CME launched from 26-Jun,
but otherwise near background levels over 1-2 Jul.
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2A. MAGNETIC SUMMARY
Geomagnetic field for Australian Region 29 Jun: Quiet
Estimated Indices 29 Jun : A K
Australian Region 0 11000000
Cocos Island 1 11100000
Darwin 1 11100000
Townsville 1 11100001
Learmonth 1 11110000
Alice Springs 0 00000000
Gingin 0 11000000
Canberra 0 11000000
Kennaook Cape Grim 0 10000000
Hobart 0 10000000
Estimated Antarctic Regional K Indices 29 Jun :
Macquarie Island 0 00000000
Casey 2 22101000
Mawson 6 32211003
Observed Regional daily pc3 Indices 29 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 29 Jun : A
Fredericksburg 6
Planetary 9
Observed AFr/Ap Indices 28 Jun : A K
Fredericksburg 6
Planetary 5 2211 1111
2B. MAGNETIC FORECAST
Date Ap Conditions
30 Jun 20 G0, chance G1
01 Jul 16 G0, chance G1
02 Jul 10 G0
COMMENT: ASWFC Geomagnetic Warning 39 was issued on 29 June and
is current for 30 Jun to 1 Jul. Geomagnetic conditions in the
Australian and Antarctic regions on UT day 29-Jun were G0. Mostly
G0 geomagnetic conditions are expected over 30-Jun to 2-Jul,
with possible isolated periods of G1 late on 30-Jun due to a
CME glancing blow, which may continue into 1-Jul.
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3A. GLOBAL HF PROPAGATION SUMMARY
Latitude Band
Date Low Middle High
29 Jun Normal Normal Normal
PCA Event : No event.
3B. GLOBAL HF PROPAGATION FORECAST
Latitude Band
Date Low Middle High
30 Jun Normal Normal Normal
01 Jul Normal Normal-fair Normal-fair
02 Jul Normal Normal Normal
COMMENT: HF radio propagation conditions on UT day 29-Jun were
mostly normal. HF radio propagation conditions are expected to
be normal on 30-Jun. Some mild degradations are possible during
local dawn hours on 1-Jul, but conditions are expected to be
normal by 2-Jul.
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4A. AUSTRALIAN REGION IONOSPHERIC SUMMARY
Date T index
29 Jun 75
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.
Northern Australian Region:
Near predicted monthly values.
Southern Australian Region:
Near predicted monthly values.
Antarctic Region (Casey/Davis/Mawson):
Enhanced by 20% 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
30 Jun 80 Near predicted monthly values
01 Jul 70 Depressed 10 to 15%/near predicted monthly values
02 Jul 80 Near predicted monthly values
COMMENT: ASWFC SWF HF Communications Warning 58 was issued on
29 June and is current for 29-30 Jun. Maximum usable frequencies
(MUFs) in the Australian region on UT day 29-Jun were mostly
near predicted monthly values. Sporadic-A was observed in Perth
during local dawn hours. MUFs are expected to be near predicted
values on 30-Jun, may briefly become depressed during local dawn
hours by 10-15% on 1-Jul, returning to normal by 2-Jul.
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5. SPACE ENVIRONMENT SUMMARY
GOES satellite data for 28 Jun
Daily Proton Fluence >1 MeV: 7.6E+05
Daily Proton Fluence >10 MeV: 1.9E+04
Daily Electron Fluence >2 MeV: 1.50E+08 (moderate fluence)
Electron Fluence Daily Deep Dielectric Discharge Probability:13%
Fluence (flux accumulation over 24hrs)/ cm2-ster-day.
X-ray background: C1.6
DSCOVR Satellite Solar Wind Day Averaged Data for 28 Jun
Speed: 469 km/sec Density: 4.1 p/cc Temp: 160000 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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