[Ips-dsgr] ASWFC Daily Report - 21 November 25 issued 2330 UT on 21 Nov 2025 [SEC=OFFICIAL]
Australian Space Weather Forecasting Centre
aswfc at bom.gov.au
Sat Nov 22 10:30:58 AEDT 2025
SUBJ: ASWFC DAILY SOLAR AND GEOPHYSICAL REPORT
ISSUED AT 2330UT/21 NOVEMBER 2025
FROM THE AUSTRALIAN SPACE WEATHER FORECASTING CENTRE
SUMMARY FOR 21 NOVEMBER AND FORECAST FOR 22 NOVEMBER - 24 NOVEMBER
STATUS INDICATORS SOL:GREEN MAG:GREEN ION: GREEN
ASWAS SCALE DESCRIPTION: https://bit.ly/3lmaMBx
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1A. SOLAR SUMMARY
Activity 21 Nov: R0
Flares: none.
Observed 10.7 cm flux/Equivalent Sunspot Number for 21 Nov: 121/73
1B. SOLAR FORECAST
22 Nov 23 Nov 24 Nov
Activity R0 R0 R0
Fadeouts None expected None expected None expected
10.7cm/SSN 120/72 120/72 125/78
COMMENT: Solar activity on UT day 21-Nov was R0, with no significant
flares. There are currently four numbered sunspots on the solar
disk, although all regions are stable with little potential for
solar flares. Solar activity is expected to be R0 over 22-24
Nov. No Earth directed CMEs were observed on UT day 21-Nov. S0
solar radiation storm conditions were observed on UT day 21-Nov.
S0 solar radiation storm conditions are expected over 22-24 Nov.
The solar wind environment on UT day 21-Nov was trending to background
levels. The solar wind speed ranged from 422 to 488 km/s and
is currently stable near 430 km/s. The peak interplanetary field
strength (IMF, Bt) was 15 nT due to waning coronal hole effects.
The north-south IMF component range (Bz) was +7 to -7 nT. The
solar wind environment is expected to be near background levels
over 22-24 Nov.
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2A. MAGNETIC SUMMARY
Geomagnetic field for Australian Region 21 Nov: G0
Estimated Indices 21 Nov : A K
Australian Region 7 23111232
Cocos Island 3 12011121
Darwin 6 22111232
Townsville 7 23111232
Learmonth 7 23121132
Alice Springs 6 22111231
Gingin 7 22121232
Canberra 7 23112222
Kennaook Cape Grim 7 23222221
Hobart 7 23122221
Estimated Antarctic Regional K Indices 21 Nov :
Macquarie Island 8 23033221
Casey 27 46533233
Mawson 17 44232433
Observed Regional daily pc3 Indices 21 Nov :
Darwin 10 (Quiet)
Townsville 0 (Quiet)
Learmonth 0 (Quiet)
Alice Springs 0 (Quiet)
Gingin 2 (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 21 Nov : A
Fredericksburg 10
Planetary 10
Observed AFr/Ap Indices 20 Nov : A K
Fredericksburg 6
Planetary 7 1211 0223
2B. MAGNETIC FORECAST
Date Ap Conditions
22 Nov 6 G0
23 Nov 5 G0
24 Nov 4 G0
COMMENT: G0 geomagnetic conditions were observed in the Australian
region on UT day 21-Nov. G0-G2 geomagnetic conditions were observed
in the Antarctic region. G0 geomagnetic conditions are expected
over 22-24 Nov.
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3A. GLOBAL HF PROPAGATION SUMMARY
Latitude Band
Date Low Middle High
21 Nov Normal Normal Normal-fair
PCA Event : No event.
3B. GLOBAL HF PROPAGATION FORECAST
Latitude Band
Date Low Middle High
22 Nov Normal Normal Normal-fair
23 Nov Normal Normal Normal
24 Nov Normal Normal Normal
COMMENT: HF radio propagation conditions on UT day 21-Nov were
mostly normal, with some mild degradations in the second half
of the day. HF radio propagation conditions are expected to be
mostly normal over 22-24 Nov.
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4A. AUSTRALIAN REGION IONOSPHERIC SUMMARY
Date T index
21 Nov 95
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:
Mostly near predicted monthly values.
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
Oct 104
Nov 89
Dec 90
4B. AUSTRALIAN REGION IONOSPHERIC FORECAST
Date T index MUFs
22 Nov 100 Near to 15% above predicted monthly values
23 Nov 110 Near to 15% above predicted monthly values
24 Nov 110 Near to 15% above predicted monthly values
COMMENT: Maximum usable frequencies (MUFs) in the Australian
region on UT day were mostly near predicted monthly values on
UT day 21-Nov. Sporadic-E was observed in Townsville, Darwin
and Hobart during local night hours.MUFs are expected to be near
predicted values over 22-24 Nov to 15% above.
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5. SPACE ENVIRONMENT SUMMARY
GOES satellite data for 20 Nov
Daily Proton Fluence >1 MeV: 8.9E+06
Daily Proton Fluence >10 MeV: 1.6E+04
Daily Electron Fluence >2 MeV: 7.90E+07 (normal fluence)
Electron Fluence Daily Deep Dielectric Discharge Probability: 9%
Fluence (flux accumulation over 24hrs)/ cm2-ster-day.
X-ray background: B6.5
DSCOVR Satellite Solar Wind Day Averaged Data for 20 Nov
Speed: 400 km/sec Density: 4.8 p/cc Temp: 89600 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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