[Ips-dsgr] IPS Daily Report - 20 April 09

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SUBJ: IPS DAILY SOLAR AND GEOPHYSICAL REPORT
ISSUED AT 20/2330Z APRIL 2009 BY IPS RADIO AND SPACE SERVICES
FROM THE AUSTRALIAN SPACE FORECAST CENTRE
SUMMARY FOR 20 APRIL AND FORECAST FOR 21 APRIL - 23 APRIL
STATUS INDICATORS SOL:GREEN   MAG:GREEN     ION: GREEN
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1A. SOLAR SUMMARY
Activity 20 Apr:  Very low

Flares: none.

Observed 10.7 cm flux/Equivalent Sunspot Number for 20 Apr:  70/5


1B. SOLAR FORECAST
             21 Apr             22 Apr             23 Apr
Activity     Very low           Very low           Very low
Fadeouts     None expected      None expected      None expected
10.7cm/SSN    70/5               70/5               70/5
COMMENT: The visible solar disk remains spotless. Solar wind 
speed is mildly elevated but is expected to decline over the 
next two days. 




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2A. MAGNETIC SUMMARY

Geomagnetic field for Australian Region 20 Apr: Quiet 

Estimated Indices 20 Apr :  A   K           
   Australian Region       4   22211111
      Darwin               3   22111001
      Townsville           7   22222222
      Learmonth            3   22211100
      Camden               -   --------
      Canberra             0   11000000
      Hobart               2   11110011
      Casey(Ant)           8   23322211
    
Observed Regional daily pc3 Indices 20 Apr : 
      Darwin               0   (Quiet)
      Townsville           0   (Quiet)
      Learmonth            0   (Quiet)
      Alice_Springs        0   (Quiet)
      Camden              NA
      Gnangara            12   (Quiet)
      Canberra             2   (Quiet)
      Hobart              10   (Quiet)
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 and have been shown to be
well correlated with rejection of high resolution aeromagnetic
survey flight-line data. 

NOTE: Indices may have been generated from data obtained in 
cooperation with the following organisations: Geoscience Australia, 
University of Newcastle Space Physics Group, Australian Government 
Antarctic Division and Space Environment Research Center, Japan.


Estimated AFr/Ap Indices 20 Apr : A 
           Fredericksburg         5
           Planetary              5                         

Observed AFr/Ap Indices 19 Apr :  A   K
           Fredericksburg         4
           Planetary              4   2210 1012     


2B. MAGNETIC FORECAST 
Date      Ap    Conditions
21 Apr     7    Quiet 
22 Apr     6    Quiet 
23 Apr     4    Quiet 
COMMENT: Chance of isolated unsettled periods at high latitudes 
days one and two. Otherwise expect generally quiet geomagnetic 
conditions. 

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

3B. GLOBAL HF PROPAGATION FORECAST
	            Latitude Band
Date        Low            Middle         High 
21 Apr      Normal         Normal         Normal
22 Apr      Normal         Normal         Normal
23 Apr      Normal         Normal         Normal

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4A. AUSTRALIAN REGION IONOSPHERIC SUMMARY


Date   T index
20 Apr     6

Observed Australian Regional MUFs
   Equatorial PNG/Niue Region:
      Near predicted monthly values during local day,
      Variable conditions during local night.
   Northern Australian Region:
      Near predicted monthly values.
   Southern Australian and New Zealand Region:
      Near predicted monthly values.
   Antarctic Region (Casey/Scott Base/Davis/Mawson):
      Near predicted monthly values over the UT day.

Predicted Monthly T index for April:   3

4B. AUSTRALIAN REGION IONOSPHERIC FORECAST
Date   T index  MUFs
21 Apr     1    Near predicted monthly values 
22 Apr     3    Near predicted monthly values 
23 Apr     3    Near predicted monthly values 
COMMENT: Mild depressions observed Equatorial region around local 
dawn. Generally weak ionospheric conditions observed Antarctic 
region. Otherwise conditions mostly normal. Expect similar conditions 
next three days. 
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5. SPACE ENVIRONMENT SUMMARY

GOES satellite data for 19 Apr
       Daily Proton Fluence >1 MeV:   4.4E+05
       Daily Proton Fluence >10 MeV:  1.9E+04
       Daily Electron Fluence >2 MeV: 1.40E+06   (normal fluence)   
Electron Fluence Daily Deep Dielectric Discharge Probability: 1%
Fluence (flux accumulation over 24hrs)/ cm2-ster-day.
       X-ray background: A1.0

ACE Satellite Solar Wind Day Averaged Data for 19 Apr
Speed: 469 km/sec  Density:    1.5 p/cc  Temp:    72400 K  Bz:   2 nT

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