[Ips-dsgr] ASWFC Daily Report - 23 November 25 issued 2330 UT on 23 Nov 2025 [SEC=OFFICIAL]
Australian Space Weather Forecasting Centre
aswfc at bom.gov.au
Mon Nov 24 10:30:49 AEDT 2025
SUBJ: ASWFC DAILY SOLAR AND GEOPHYSICAL REPORT
ISSUED AT 2330UT/23 NOVEMBER 2025
FROM THE AUSTRALIAN SPACE WEATHER FORECASTING CENTRE
SUMMARY FOR 23 NOVEMBER AND FORECAST FOR 24 NOVEMBER - 26 NOVEMBER
STATUS INDICATORS SOL:GREEN MAG:** YELLOW ** ION: GREEN
ASWAS SCALE DESCRIPTION: https://bit.ly/3lmaMBx
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1A. SOLAR SUMMARY
Activity 23 Nov: R0
Flares: none.
Observed 10.7 cm flux/Equivalent Sunspot Number for 23 Nov: 120/72
1B. SOLAR FORECAST
24 Nov 25 Nov 26 Nov
Activity R0, chance R1 R0, chance R1 R0, chance R1
Fadeouts None expected None expected None expected
10.7cm/SSN 125/78 125/78 130/84
COMMENT: Solar activity was at the R0 level for the UT day 23-Nov,
with no significant flare events observed in the last 24 hours.
There are currently five numbered regions on the visible solar
disk, with Active Regions 4290 (S09E47, Beta) and 4291 (S14E54,
Beta-Delta) being the largest and most magnetically complex.
Both of these regions, lying in proximity to each other, have
shown some growth over the previous UT day. New Active Region
4292 appeared on the surface near (S16E01), and has a beta magnetic
classification. A new unnumbered region also appeared at (N10E62).
This region appears to exhibit a Beta magnetic classification,
but is somewhat affected by foreshortening. All other regions
appear mostly stable. Solar activity is expected to remain at
the R0 level over UT days Nov 24-26, with a chance of R1 based
on the growth of Active Regions 4290 and 4291. Solar radiation
storm conditions were at the S0 level during UT day 23-Nov, and
S0 conditions are forecast to continue over the period 24-26
Nov. There were no geoeffective Coronal Mass Ejections observed
over the past UT day. The solar wind speed has gradually increased
over the past last 24 hours, broadly ranging between 360-460
km/s, and is currently at 460 km/s. The interplanetary magnetic
field strength (IMF, Bt) peaked at 14 nT during 23-Nov, with
the North-South component (Bz) ranging between -9 and +12 nT.
The solar wind speed is forecast to further increase due to high
speed wind effects as an equatorial coronal hole continues to
rotate into a geoeffective position.
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2A. MAGNETIC SUMMARY
Geomagnetic field for Australian Region 23 Nov: G0
Estimated Indices 23 Nov : A K
Australian Region 8 21322322
Cocos Island 7 11322311
Darwin 11 22323323
Townsville 11 22323332
Learmonth 10 21323323
Alice Springs 9 21323322
Gingin 9 21222422
Canberra 9 21322332
Kennaook Cape Grim 8 21322322
Hobart 9 22322322
Estimated Antarctic Regional K Indices 23 Nov :
Macquarie Island 15 11145421
Casey 22 35433334
Mawson 19 33434433
Observed Regional daily pc3 Indices 23 Nov :
Darwin 0 (Quiet)
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 23 Nov : A
Fredericksburg 10
Planetary 12
Observed AFr/Ap Indices 22 Nov : A K
Fredericksburg 3
Planetary 6 3111 1123
2B. MAGNETIC FORECAST
Date Ap Conditions
24 Nov 10 G0, chance G1
25 Nov 14 G0, chance G1
26 Nov 20 G0-G1
COMMENT: G0 geomagnetic conditions were observed across the Australian
region throughout UT day 23-Nov, with a brief period of G1 geomagnetic
conditions observed at Macquarie Island. G0 geomagnetic conditions,
with a chance of G1, are expected on 24-26 Nov, as the Earth
moves further into the path of a coronal hole high speed wind
stream.
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3A. GLOBAL HF PROPAGATION SUMMARY
Latitude Band
Date Low Middle High
23 Nov Normal-fair Normal-fair Fair
PCA Event : No event.
3B. GLOBAL HF PROPAGATION FORECAST
Latitude Band
Date Low Middle High
24 Nov Normal Normal Normal-fair
25 Nov Normal Normal Normal-fair
26 Nov Normal Normal Normal-fair
COMMENT: HF radio propagation conditions on UT day 23-Nov were
mostly fair to normal, with fair-poor conditions observed during
night hours in both the north and south Atlantic regions. Scintillation
activity was observed from the start of the UT day 23-Nov until
23/0100 UT in the Atlantic Ocean and South American region. Mostly
normal conditions are expected over 24-26 Nov, with further depressions
and scintillation events possible in the Atlantic region.
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4A. AUSTRALIAN REGION IONOSPHERIC SUMMARY
Date T index
23 Nov 129
Observed Australian Regional MUFs
Cocos Island Region:
No data available during local day.
No data available during local night.
Niue Island Region:
Enhanced by 15% during local day.
Near predicted monthly values during local night.
Northern Australian Region:
Near predicted monthly values during local day.
Enhanced by 15% during local night.
Southern Australian Region:
Near predicted monthly values during local day.
Enhanced by 15% during local night.
Enhanced by 25% after local dawn.
Antarctic Region (Casey/Davis/Mawson):
Near predicted monthly values over the UT day.
Monthly T index:
Month T index
Oct 104
Nov 89
Dec 90
4B. AUSTRALIAN REGION IONOSPHERIC FORECAST
Date T index MUFs
24 Nov 110 Near to 15% above predicted monthly values
25 Nov 110 Near to 15% above predicted monthly values
26 Nov 105 Near predicted monthly values
COMMENT: Maximum usable frequencies (MUFs) were largely near
predicted monthly values to 15% enhanced in the Australian region,
with some sporadic-E observed during night hours in Hobart and
Learmonth. MUFs are expected to be near predicted monthly values
to enhanced by 15% for 24-Nov, declining to near predicted monthly
values during 25-26 Nov. Sporadic-E during local night hours
may be observed.
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5. SPACE ENVIRONMENT SUMMARY
GOES satellite data for 22 Nov
Daily Proton Fluence >1 MeV: 2.0E+06
Daily Proton Fluence >10 MeV: 1.8E+04
Daily Electron Fluence >2 MeV: 1.60E+07 (normal fluence)
Electron Fluence Daily Deep Dielectric Discharge Probability: 3%
Fluence (flux accumulation over 24hrs)/ cm2-ster-day.
X-ray background: B6.1
DSCOVR Satellite Solar Wind Day Averaged Data for 22 Nov
Speed: 425 km/sec Density: 4.1 p/cc Temp: 93000 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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