[Ips-dsgr] ASWFC Daily Report - 13 July 26 issued 2330 UT on 13 Jul 2026 [SEC=OFFICIAL]
Australian Space Weather Forecasting Centre
aswfc at bom.gov.au
Tue Jul 14 09:30:50 AEST 2026
SUBJ: ASWFC DAILY SOLAR AND GEOPHYSICAL REPORT
ISSUED AT 2330UT/13 JULY 2026
FROM THE AUSTRALIAN SPACE WEATHER FORECASTING CENTRE
SUMMARY FOR 13 JULY AND FORECAST FOR 14 JULY - 16 JULY
STATUS INDICATORS SOL:GREEN MAG:GREEN ION: GREEN
ASWAS SCALE DESCRIPTION: https://bit.ly/3lmaMBx
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1A. SOLAR SUMMARY
Activity 13 Jul: R0
Flares: none.
Observed 10.7 cm flux/Equivalent Sunspot Number for 13 Jul: 103/52
1B. SOLAR FORECAST
14 Jul 15 Jul 16 Jul
Activity R0, chance R1 R0, chance R1 R0
Fadeouts None expected None expected None expected
10.7cm/SSN 110/60 115/66 120/72
COMMENT: Solar activity on UT day 13-Jul was R0, with no solar
flares. There are currently four numbered sunspots on the solar
disk, but all regions are currently stable. Solar activity is
expected to be R0, chance R1 over 14-16 Jul.
No CMEs were observed on UT day 13-Jul.
S0 solar radiation storm conditions were observed on UT day 13-Jul.
S0 solar radiation storm conditions are expected over 14-16 Jul.
The solar wind environment on UT day 13-Jul was
mildly disturbed from 1400 UT, likely due to a recent CME weakly
glancing the Earth. The solar wind speed ranged between 415 and
430 km/s. The peak total interplanetary field strength (IMF,
Bt) was 8 nT and the north-south IMF component range (Bz) was
+1 to -5 nT. The solar wind may be intermittently disturbed over
14-15 Jul, although weakly, due to further glancing blows. Solar
wind conditions are expected to be at background levels on 16-Jul.
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2A. MAGNETIC SUMMARY
Geomagnetic field for Australian Region 13 Jul: G0
Estimated Indices 13 Jul : A K
Australian Region 5 11112222
Cocos Island 5 11112222
Darwin 5 21112222
Townsville 6 22112222
Learmonth 8 22113223
Alice Springs 5 11112222
Gingin 8 11113233
Canberra 4 11012222
Kennaook Cape Grim 6 12112322
Hobart 6 12112322
Estimated Antarctic Regional K Indices 13 Jul :
Macquarie Island 6 01023232
Casey 6 12112223
Mawson 24 33312356
Observed Regional daily pc3 Indices 13 Jul :
Darwin NA
Townsville 0 (Quiet)
Learmonth 0 (Quiet)
Alice Springs 0 (Quiet)
Gingin 0 (Quiet)
Canberra 0 (Quiet)
Hobart 2 (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 13 Jul : A
Fredericksburg 10
Planetary 11
Observed AFr/Ap Indices 12 Jul : A K
Fredericksburg 16
Planetary 18 4234 5323
2B. MAGNETIC FORECAST
Date Ap Conditions
14 Jul 8 G0
15 Jul 10 G0
16 Jul 10 G0
COMMENT: G0 geomagnetic conditions were observed in the Australian
region on UT day 13-Jul. G0-G1 geomagnetic conditions were observed
in the Antarctic region. Mostly G0 geomagnetic conditions are
expected over 14-16 Jul. Several weak CME arrivals are possible
over this period, but are not expected to induce geomagnetic
conditions above G0.
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3A. GLOBAL HF PROPAGATION SUMMARY
Latitude Band
Date Low Middle High
13 Jul Fair Normal-fair Normal-fair
PCA Event : No event.
3B. GLOBAL HF PROPAGATION FORECAST
Latitude Band
Date Low Middle High
14 Jul Normal-fair Normal-fair Normal-fair
15 Jul Normal-fair Normal-fair Normal-fair
16 Jul Normal Normal-fair Normal-fair
COMMENT: HF radio propagation conditions on UT day 13-Jul were
mostly normal to mildly degraded across the globe. HF propagation
conditions over 14-16 Jul may be mildly degraded due to possible
weak CME arrivals, but normal during daylight hours.
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4A. AUSTRALIAN REGION IONOSPHERIC SUMMARY
Date T index
13 Jul 60
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 25% during local night.
Northern Australian Region:
Near predicted monthly values during local day.
Depressed by 20% during local night.
Southern Australian Region:
Mostly near predicted monthly values.
Antarctic Region (Casey/Davis/Mawson):
Near predicted monthly values over the UT day.
Monthly T index:
Month T index
Jun 81
Jul 66
Aug 63
4B. AUSTRALIAN REGION IONOSPHERIC FORECAST
Date T index MUFs
14 Jul 70 Near predicted monthly values to 15% depressed
15 Jul 75 Near predicted monthly values
16 Jul 75 Near predicted monthly values
COMMENT: Maximum usable frequencies (MUFs) in the Australian
region on UT day 13-Jul were near predicted values to 20% depressed.
HF conditions in most Australian sites were degraded during local
dawn hours with significant spread-F. MUFs are expected to be
mostly near predicted monthly values over 14-16 Jul, with residual
depressions possible on 14-Jul up to 15%. Mildly degraded HF
conditions are possible during local dawn hours.
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5. SPACE ENVIRONMENT SUMMARY
GOES satellite data for 12 Jul
Daily Proton Fluence >1 MeV: 1.5E+06
Daily Proton Fluence >10 MeV: 1.8E+04
Daily Electron Fluence >2 MeV: 1.20E+08 (moderate fluence)
Electron Fluence Daily Deep Dielectric Discharge Probability:12%
Fluence (flux accumulation over 24hrs)/ cm2-ster-day.
X-ray background: B5.4
DSCOVR Satellite Solar Wind Day Averaged Data for 12 Jul
Speed: 512 km/sec Density: 4.8 p/cc Temp: 97700 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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