[Ips-dsgr] IPS Daily Report - 26 April 08

[rwc]

SUBJ: IPS DAILY SOLAR AND GEOPHYSICAL REPORT
ISSUED AT 26/2330Z APRIL 2008 BY IPS RADIO AND SPACE SERVICES
FROM THE AUSTRALIAN SPACE FORECAST CENTRE
SUMMARY FOR 26 APRIL AND FORECAST FOR 27 APRIL - 29 APRIL
STATUS INDICATORS SOL:GREEN   MAG:GREEN     ION: GREEN
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1A. SOLAR SUMMARY
Activity 26 Apr:  Very low

Flares: none.

Observed 10.7 cm flux/Equivalent Sunspot Number for 26 Apr:  69/3


1B. SOLAR FORECAST
             27 Apr             28 Apr             29 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: Solar activity was Very Low over the last 24 hours, 
expected to continue next 3 days. A Type II and Type IV radio 
sweep was observed just after 1400UT, associated with a B3 Xray 
flare, a wave in both SOHO and STEREO EUV imagery, and a weak 
halo/partial halo CME observed in SOHO LASCO C2. The activity 
originated from a spotless active region near N10E10. The CME 
is likely to reach Earth 29-30 Apr. The Interplanetary Magnetic 
Field (IMF) Bz component has been persistently southwards for 
the last 12 hours at between -3 and -4nT. 

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2A. MAGNETIC SUMMARY

Geomagnetic field for Australian Region 26 Apr: Quiet to Unsettled 

Estimated Indices 26 Apr :  A   K           
   Australian Region      11   21323333
      Darwin              15   --3-----
      Townsville          27   --4-----
      Learmonth           10   21223333
      Camden               8   21222323
      Canberra             9   21323322
      Hobart              12   21333333
      Casey(Ant)          13   33322333
    
Observed Regional daily pc3 Indices 26 Apr : 
      Darwin               0   (Quiet)
      Townsville           0   (Quiet)
      Learmonth            0   (Quiet)
      Canberra             0   (Quiet)
      Hobart               9   (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 26 Apr : A 
           Fredericksburg         7
           Planetary              8                         

Observed AFr/Ap Indices 25 Apr :  A   K
           Fredericksburg         7
           Planetary              8   3322 1222     


2B. MAGNETIC FORECAST 
Date      Ap    Conditions
27 Apr     5    Quiet 
28 Apr     3    Quiet 
29 Apr     3    Quiet 

COMMENT: The geomagnetic field was mostly Quiet becoming Unsettled 
in the second half of the UT day. Expect mostly Quiet conditions 
27-28 Apr. Some Unsettled - Active conditions are expected late 
29 Apr following arrival of the CME which occurred today at 1400UT. 

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

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

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4A. AUSTRALIAN REGION IONOSPHERIC SUMMARY


Date   T index
26 Apr     6

Observed Australian Regional MUFs
near predicted monthly values

Predicted Monthly T index for April:   6

4B. AUSTRALIAN REGION IONOSPHERIC FORECAST
Date   T index  MUFs
27 Apr     5    near predicted monthly values 
28 Apr     0    near predicted monthly values 
29 Apr     0    Near predicted monthly values 

COMMENT: HF conditions were mostly normal and MUFs near predicted 
monthly values over the UT day. These conditions are expected 
to continue 27-29 Apr. 

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5. SPACE ENVIRONMENT SUMMARY

GOES satellite data for 25 Apr
       Daily Proton Fluence >1 MeV:   1.3E+06
       Daily Proton Fluence >10 MeV:  1.7E+04
       Daily Electron Fluence >2 MeV: 7.80E+08   (high fluence)   
Electron Fluence Daily Deep Dielectric Discharge Probability:27%
Fluence (flux accumulation over 24hrs)/ cm2-ster-day.
       X-ray background: A1.0

ACE Satellite Solar Wind Day Averaged Data for 25 Apr
Speed: 569 km/sec  Density:    0.6 p/cc  Temp:   132000 K  Bz:  -1 nT

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