[Ips-dsgr] IPS Daily Report - 25 April 05

[rwc]

SUBJ: IPS DAILY SOLAR AND GEOPHYSICAL REPORT
ISSUED AT 25/2330Z APRIL 2005 BY IPS RADIO AND SPACE SERVICES
FROM THE AUSTRALIAN SPACE FORECAST CENTRE
SUMMARY FOR 25 APRIL AND FORECAST FOR 26 APRIL - 28 APRIL
STATUS INDICATORS SOL:GREEN   MAG:GREEN     ION: GREEN
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1A. SOLAR SUMMARY
Activity 25 Apr:  Very low

Flares: none.

Observed 10.7 cm flux/Equivalent Sunspot Number for 25 Apr:  86/29


1B. SOLAR FORECAST
             26 Apr             27 Apr             28 Apr
Activity     Very low           Very low           Very low
Fadeouts     None expected      None expected      None expected
10.7cm/SSN    90/34             100/48             100/48
COMMENT: A new solar region has rotated over the south-east solar 
limb. Visible in Culgoora H-alpha imagery. 



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2A. MAGNETIC SUMMARY

Geomagnetic field for Australian Region 25 Apr: Quiet to Unsettled 

Estimated Indices 25 Apr :  A   K           
   Australian Region       6   2322 1111
      Learmonth            5   2222 2111
      Culgoora             5   2321 1111
      Canberra             7   2332 1111
      Hobart               6   2322 1111
      Casey(Ant)          10   3333 2111
    
Observed Regional daily pc3 Indices 25 Apr : 
      Townsville          NA
      Learmonth           NA
      Culgoora            NA
      Canberra            NA
      Hobart             111   (Major storm)
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 25 Apr : A 
           Fredericksburg         8
           Planetary             10                         

Observed AFr/Ap Indices 24 Apr :  A   K
           Fredericksburg         5
           Planetary             10   3422 2222     


2B. MAGNETIC FORECAST 
Date      Ap    Conditions
26 Apr    10    Quiet to Unsettled 
27 Apr     6    Quiet 
28 Apr     7    Quiet 


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3A. GLOBAL HF PROPAGATION SUMMARY
	            Latitude Band
Date        Low            Middle         High 
25 Apr      Normal         Normal         Normal-Fair
PCA Event : No event.

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

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4A. AUSTRALIAN REGION IONOSPHERIC SUMMARY


Date   T index
25 Apr    44

Observed Australian Regional MUFs
   Equatorial PNG Region:
     No data available during local day,
     Enhanced by 15% during local night.
  Northern Australian Region:
     Near predicted monthly values during local day,
     Depressed by 30% during local night.
  Southern Australian and New Zealand Region:
     Near predicted monthly values.
  Antarctic Region (Casey/Scott Base):
     Near predicted monthly values over the UT day.

Predicted Monthly T index for April:  29

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

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5. SPACE ENVIRONMENT SUMMARY

GOES satellite data for 24 Apr
       Daily Proton Fluence >1 MeV:   3.2E+05
       Daily Proton Fluence >10 MeV:  1.4E+04
       Daily Electron Fluence >2 MeV: 6.30E+06 (normal fluence)  
Electron Fluence Daily Deep Dielectric Discharge Probability: 1%
Fluence (flux accumulation over 24hrs)/ cm2-ster-day.
       X-ray background: B1.1

ACE Satellite Solar Wind Day Averaged Data for 24 Apr
Speed: 550 km/sec  Density:    3.4 p/cc  Temp:   129000 K  Bz:   1 nT

(Courtesy Space Environment Center, Boulder USA)
ACE data can be incorrect during strong proton events.
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