[Ips-dhfpr] ASWFC Daily HF Prop Report - 02 April 25 issued 2331 UT on 02 Apr 2025 [SEC=OFFICIAL]

[Australian Space Weather Forecasting Centre]

SUBJ: ASWFC DAILY HF PROPAGATION REPORT
ISSUED AT 2330UT/02 APRIL 2025
FROM THE AUSTRALIAN SPACE WEATHER FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (02 APRIL) 
Date   T index  Conditions    
02 Apr   153    Normal-fair    

Flares    Max     Fadeout    Freq.  Sectors
  M2.5 01/2231UT  possible   lower  East Pacific/
                                    North American

MUFs:
   Cocos Island Region:
      Enhanced by 20% during local day.
      Enhanced by 30% during local night.
   Niue Island Region:
      Enhanced by 25% during local day.
      Enhanced by 20% during local night.
   Northern Australian Region:
      Near predicted monthly values during local day.
      Enhanced by 15% during local night.
   Southern Australian Region:
      Enhanced by 20% during local day.
      Enhanced by 20% during local night.
   Antarctic Region (Casey/Davis/Mawson):
      Near predicted monthly values over the UT day.

PCA Event : 10MeV Proton/PCA Event Began at 1425UT 31/03, Ended at 0810UT 02/04

Monthly T index:
Month  T index
Mar      126
Apr      115
May      113


2. FORECAST (03 APRIL - 05 APRIL)
Date   T index  Conditions       MUFs                              
03 Apr   148    Normal-fair      About 15% above predicted monthly 
                                 values to 10% depressed
04 Apr   145    Normal           About 15% above predicted monthly 
                                 values    
05 Apr   145    Normal           Near predicted monthly values   

COMMENT: ASWFC SWF HF Communications Warning 33 was issued on 
31 March and is current for 1-3 Apr. Maximum usable frequencies 
(MUFs) on UT day 2-Apr in the Australian region were generally 
near predicted values to 20% enhanced, although some polar cap 
absorption may have been observed at high latitudes. MUFs are 
expected to be initially enhanced on UT day 3-Apr but may be 
on a slightly depressing trend due to prolonged Bz south conditions 
yesterday. Otherwise conditions are expected to remain near predicted 
values to slightly enhanced until the onset of a small coronal 
hole, likely UT day 5-Apr.

----------------------------------------------------------
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