[Ips-dhfpr] ASWFC Daily HF Prop Report - 30 March 23 issued 2331 UT on 30 Mar 2023 [SEC=OFFICIAL]

[Regional Warning Centre]

SUBJ: ASWFC DAILY HF PROPAGATION REPORT
ISSUED AT 2330UT/30 MARCH 2023
FROM THE AUSTRALIAN SPACE WEATHER FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (30 MARCH) 
Date   T index  Conditions    
30 Mar   151    Normal         

Flares    Max     Fadeout    Freq.  Sectors
  M1.1 29/2347UT  possible   lower  West Pacific
  M5.4    0737UT  possible   lower  Mid East/Indian

MUFs:
   Cocos Island Region:
      Enhanced by 35% during local day.
      Enhanced by 85% during local night.
      Enhanced by 40% after local dawn.
   Niue Island Region:
      Enhanced by 40% during local day.
      Enhanced by 60% during local night.
      Enhanced by 40% after local dawn.
   Northern Australian Region:
      Enhanced by 30% during local day.
      Enhanced by 30% during local night.
      Enhanced by 40% after local dawn.
   Southern Australian Region:
      Enhanced by 35% during local day.
      Enhanced by 25% during local night.
   Antarctic Region (Casey/Scott Base/Davis/Mawson):
      Near predicted monthly values over the UT day.

PCA Event : No event.

Monthly T index:
Month  T index
Feb      117
Mar      80
Apr      80


2. FORECAST (31 MARCH - 02 APRIL)
Date   T index  Conditions       MUFs                              
31 Mar   130    Normal-fair      Near to 15% above predicted 
                                 monthly values
01 Apr   130    Normal           Near to 15% above predicted 
                                 monthly values    
02 Apr   135    Normal           Near to 15% above predicted 
                                 monthly values   

COMMENT: Maximum usable frequencies (MUFs) on UT day 30-Mar in 
the Australian region were enhanced by 25-40%. Strong enhancements 
were observed at Cocos Islands and Niue. Mild depressions are 
possible on 31-Mar in the Southern Australian region due to recent 
coronal hole high speed wind stream induced geomagnetic activity. 
MUFs are expected to be near predicted monthly values to 15% 
enhanced in the Northern Australian region on 31-Mar. MUFs are 
expected to be near predicted monthly values to 15% enhanced 
over 1-2 Apr. Shortwave fadeouts are possible.

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