[Ips-dsgr] IPS Daily Report - 23 April 01

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SUBJ: IPS DAILY SOLAR AND GEOPHYSICAL REPORT
ISSUED AT 23/2330Z APRIL 2001 BY IPS RADIO AND SPACE SERVICES
FROM THE AUSTRALIAN SPACE FORECAST CENTRE
SUMMARY FOR 23 APRIL AND FORECAST FOR 24 APRIL - 26 APRIL
STATUS INDICATORS SOL:** YELLOW **   MAG:GREEN     ION: GREEN
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1A. SOLAR SUMMARY
Activity 23 Apr:  Moderate

Flares    Max     Fadeout    Freq.  Sectors
 M1/1F    0128UT  possible   lower  E. Asia/Aust.
 M4/2N    2030UT  possible   lower  East Pacific/
                                    North American

Observed 10.7 cm flux/Equivalent Sunspot Number for 23 Apr: 196/148

GOES satellite data for 22 Apr
       Daily Proton Fluence >1 MeV:   5.1E+05
       Daily Proton Fluence >10 MeV:  4.4E+04
       Daily Electron Fluence >2 MeV: 3.90E+05 (normal)
       X-ray background: C1.1
Fluence (flux accumulation over 24hrs)/ cm2-ster-day.

1B. SOLAR FORECAST
             24 Apr             25 Apr             26 Apr
Activity     Moderate to high   Moderate to high   Moderate to high
Fadeouts     Probable           Probable           Probable
10.7cm/SSN   205/156            210/161            210/161

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2A. MAGNETIC SUMMARY
Geomagnetic field for Australian Region 23 Apr: Quiet to Unsettled 

Estimated Indices 23 Apr :  A   K           
   Australian Region        9   3233 2113
      Darwin                8   3233 2013
      Townsville            8   3223 2113
      Learmonth             9   3323 2124
      Canberra             10   3234 2103
      Hobart               10   3234 1103
    
Observed Regional daily pc3 Indices 23 APR : 
      Darwin                0   (Quiet)
      Townsville            0   (Quiet)
      Learmonth             2   (Quiet)
      Canberra              0   (Quiet)
      Hobart               26   (Quiet to unsettled)
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.

Estimated AFr/Ap Indices 23 Apr : A 
           Fredericksburg        20
           Planetary             25                         

Observed AFr/Ap Indices 22 Apr :  A   K
           Fredericksburg        17
           Planetary             28   4354 5534     


2B. MAGNETIC FORECAST 
Date      Ap    Conditions
24 Apr     8    Quiet to unsettled 
25 Apr     8    Quiet to unsettled 
26 Apr     8    Quiet to unsettled 
COMMENT: IPS Geomagnetic Warning 16 was issued on 20 April and 
is current for interval 23-25 April. 
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3A. GLOBAL HF PROPAGATION SUMMARY
	            Latitude Band
Date        Low            Middle         High 
23 Apr      Normal         Normal-fair    Fair-poor      
PCA Event : No event.

3B. GLOBAL HF PROPAGATION FORECAST
	            Latitude Band
Date        Low            Middle         High 
24 Apr      Normal         Normal         Normal-Fair
25 Apr      Normal         Normal         Normal-Fair
26 Apr      Normal         Normal         Normal-Fair

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4A. AUSTRALIAN REGION IONOSPHERIC SUMMARY
Date   T index
23 Apr    73

Observed Australian Regional MUFs
   Equatorial PNG Region:
      Near predicted monthly values during local day,
      Depressed by 30% during local night.
   Northern Australian Region:
      Near predicted monthly values during local day,
      Depressed by 20% during local night.
   Southern Australian and New Zealand Region:
      Depressed by 35% during local day,
      Depressed by 35% during local night.
   Antarctic Region (Casey/Scott Base):
      Depressed by 15% over the UT day.


Predicted Monthly T index for April: 120

4B. AUSTRALIAN REGION IONOSPHERIC FORECAST
Date   T index  MUFs
24 Apr   120    Near predicted monthly values 
25 Apr   120    Near predicted monthly values 
26 Apr   120    Near predicted monthly values 


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