[Ips-whfpr] ASWFC Weekly Prop. Report (25 March 26) issued 0042 UT on 25 Mar 2026 [SEC=OFFICIAL]

[Australian Space Weather Forecasting Centre]

SUBJ: ASWFC WEEKLY HF PROPAGATION REPORT
ISSUED ON 25 MARCH 2026 
FROM THE AUSTRALIAN SPACE WEATHER FORECASTING CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (18 MARCH - 24 MARCH)
Date   T index   Conditions        
18 Mar   87      Normal            
MUFS:
   Cocos Island Region:
      Near predicted monthly values during local day.
      Depressed by 15% during local night.
   Niue Island Region:
      Near predicted monthly values during local day.
      Depressed by 20% during local night.
   Northern Australian Region:
      Near predicted monthly values.
   Southern Australian Region:
      Near predicted monthly values.
   Antarctic Region (Casey/Davis/Mawson):
      Near predicted monthly values over the UT day.

19 Mar   83      Normal            
MUFS:
   Cocos Island Region:
      Mostly near predicted monthly values.
   Niue Island Region:
      Near predicted monthly values during local day.
      Enhanced by 20% during local night.
   Northern Australian Region:
      Near predicted monthly values during local day.
      Depressed by 25% during local night.
   Southern Australian Region:
      Near predicted monthly values.
   Antarctic Region (Casey/Davis/Mawson):
      Near predicted monthly values over the UT day.

20 Mar   95      Normal-fair       
MUFS:
   Cocos Island Region:
      Enhanced by 25% during local day.
      Enhanced by 30% during local night.
   Niue Island Region:
      Near predicted monthly values during local day.
      No data available during local night.
   Northern Australian Region:
      Mostly near predicted monthly values.
   Southern Australian Region:
      Mostly near predicted monthly values.
   Antarctic Region (Casey/Davis/Mawson):
      Depressed by 15% over the UT day.

21 Mar   39      Fair              
MUFS:
   Cocos Island Region:
      Depressed by 25% during local day.
      Depressed by 30% during local night.
   Niue Island Region:
      No data available.
   Northern Australian Region:
      Depressed by 15% during local day.
      Depressed by 30% during local night.
   Southern Australian Region:
      Depressed by 30% during local day.
      Depressed by 15% during local night.
   Antarctic Region (Casey/Davis/Mawson):
      Depressed by 35% over the UT day.

22 Mar   84      Fair              
MUFS:
   Cocos Island Region:
      Enhanced by 25% during local day.
      Near predicted monthly values during local night.
   Niue Island Region:
      No data available.
   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.
      Depressed by 20% during local night.
   Antarctic Region (Casey/Davis/Mawson):
      Depressed by 35% over the UT day.

23 Mar   38      Fair              
MUFS:
   Cocos Island Region:
      Near predicted monthly values during local day.
      Depressed by 40% during local night.
   Niue Island Region:
      No data available.
   Northern Australian Region:
      Enhanced by 20% during local day.
      Depressed by 20% during local night.
   Southern Australian Region:
      Depressed by 30-35%.
   Antarctic Region (Casey/Davis/Mawson):
      Depressed by 20% over the UT day.

24 Mar   52      Fair-normal       
MUFS:
   Cocos Island Region:
      Near predicted monthly values during local day.
      Depressed by 35% during local night.
   Niue Island Region:
      No data available.
   Northern Australian Region:
      Near predicted monthly values during local day.
      Depressed by 20% during local night.
   Southern Australian Region:
      Depressed by 25% during local day.
      Depressed by 15% during local night.
   Antarctic Region (Casey/Davis/Mawson):
      Depressed by 20% over the UT day.

Comment: Australian regional MUFs were generally depressed
during 21-Mar and 23-24-Mar due to an extended period of 
geomagnetic activity induced by a combination of CME arrivals
and a coronal hole high speed wind stream from a large 
coronal hole.

Predicted Monthly T index for March:  87

2. FORECAST (25 MARCH - 31 MARCH) 
MUFS: Mildly depressed 10-20% on 25-Mar.
MUFs are expected to be near predicted monthly 
values on other days of the week.

Propagation conditions: Normal. Isolated minor
shortwave fadeouts are possible.

T index: 80

3. OUTLOOK (01 APRIL - 01 MAY)
Degraded HF propagation conditions possible:
9-11 Apr,  17-20 Apr

PLEASE NOTE:
Space weather conditions can frequently be determined by short 
timescale events that cannot be forecast a week in advance,
particularly at solar maximum.

For an explanation of some of the terms in this report, go to
https://www.sws.bom.gov.au, and follow links to Educational->
Glossary on Solar Terrestrial Terms.

Australian Space Weather Forecasting Centre
Bureau of Meteorology
ASWFC at bom.gov.au
www.bom.gov.au | www.sws.bom.gov.au