[Ips-dsgr] SWS Daily Report - 26 June 20 issued 2331 UT on 26 Jun 2020

Sat Jun 27 09:31:23 EST 2020

SUBJ: SWS DAILY SOLAR AND GEOPHYSICAL REPORT
ISSUED AT 2330UT/26 JUNE 2020 BY Space Weather Services
FROM THE AUSTRALIAN SPACE FORECAST CENTRE
SUMMARY FOR 26 JUNE AND FORECAST FOR 27 JUNE - 29 JUNE
STATUS INDICATORS SOL:GREEN   MAG:GREEN     ION: GREEN
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1A. SOLAR SUMMARY
Activity 26 Jun:  Very low

Flares: none.

Observed 10.7 cm flux/Equivalent Sunspot Number for 26 Jun:  68/2

1B. SOLAR FORECAST
             27 Jun             28 Jun             29 Jun
Activity     Very low           Very low           Very low
Fadeouts     None expected      None expected      None expected
10.7cm/SSN    68/2               68/2               68/2

COMMENT: Solar activity was very low on UT day 26 June. There 
are currently no numbered regions on the visible solar disc. 
Very low solar activity is expected for the next three UT days, 
27-29 June. No Earthward directed CMEs were observed in the available 
coronagraph images. During UT day 26 June, the solar wind speed 
varied between 300-350 Km/s. The total IMF (Bt) varied between 
2-8 nT and the north-south IMF component (Bz) varied mostly between 
+6/-8 nT. During the next UT day, 27 June, the solar wind speed 
is expected to vary between its background levels and moderately 
enhanced levels. The enhancement may occur due to weak coronal 
hole effects.

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2A. MAGNETIC SUMMARY

Geomagnetic field for Australian Region 26 Jun: Quiet

Estimated Indices 26 Jun : A   K           
   Australian Region       2   11001022
      Cocos Island         2   10000022
      Darwin               1   10100011
      Townsville           3   11101022
      Learmonth            2   10000022
      Alice Springs        2   00101021
      Gingin               4   12001032
      Canberra             2   11002011
      Hobart               3   11002022    

Estimated Antarctic Regional K Indices 26 Jun :
      Macquarie Island     2   00003001
      Casey                4   11111032
      Mawson              19   31111156

Observed Regional daily pc3 Indices 26 Jun : 
      Darwin               0   (Quiet)
      Townsville           0   (Quiet)
      Learmonth            0   (Quiet)
      Alice Springs        0   (Quiet)
      Gingin               4   (Quiet)
      Canberra             0   (Quiet)
      Melbourne           NA

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 International Center for Space Weather 
Science and Education, Japan.

Estimated AFr/Ap Indices 26 Jun : A 
           Fredericksburg         4
           Planetary              5                         

Observed AFr/Ap Indices 25 Jun :  A   K
           Fredericksburg         2
           Planetary              3   1101 1112     

2B. MAGNETIC FORECAST 
Date      Ap    Conditions
27 Jun     8    Quiet to Unsettled
28 Jun     7    Quiet
29 Jun     7    Quiet

COMMENT: On UT day 26 June, geomagnetic conditions were quiet 
in the Australian region. Mostly quiet conditions with isolated 
disturbed periods were observed in the Antarctic region. Global 
geomagnetic activity is expected to be mostly quiet for the next 
three UT days, 27-29 June. Isolated unsettled periods are possible 
on 27 June due to minor coronal hole effects.

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3A. GLOBAL HF PROPAGATION SUMMARY
	            Latitude Band
Date        Low            Middle         High 
26 Jun      Normal         Normal         Normal-fair    

PCA Event : No event.

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

COMMENT: Mostly normal HF conditions are expected for the next 
three UT days, 27-29 June.

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4A. AUSTRALIAN REGION IONOSPHERIC SUMMARY

Date   T index
26 Jun     5

Observed Australian Regional MUFs
   Cocos Island Region:
      No data available.
   Niue Island Region:
      Near predicted monthly values during local day.
      Enhanced by 25% during local night.
   Northern Australian Region:
      Near predicted monthly values during local day.
      Enhanced by 15% during local night.
   Southern Australian Region:
      Near predicted monthly values during local day.
      Enhanced by 60% during local night.
      Enhanced by 20% after local dawn.
   Antarctic Region (Casey/Scott Base/Davis/Mawson):
      Near predicted monthly values over the UT day.

Monthly T index:
Month  T index
May      1
Jun      -12
Jul      -13

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

COMMENT: MUFs were near predicted monthly values to moderately 
enhanced levels on UT day 26 June. The enhancements were observed 
mostly during local night. Sporadic E and spread F were observed 
at times over some Australian sites. MUFs in the Australian region 
are expected to be mostly near predicted monthly values for the 
next three UT days, 27-29 June.

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5. SPACE ENVIRONMENT SUMMARY

GOES satellite data for 25 Jun
       Daily Proton Fluence >1 MeV:   1.2E+05
       Daily Proton Fluence >10 MeV:  4.7E+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

DSCOVR Satellite Solar Wind Day Averaged Data for 25 Jun
Speed: 351 km/sec  Density:    3.0 p/cc  Temp:    45800 K  Bz:   1 nT

(Courtesy Space Weather Prediction Center, Boulder USA)
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Bureau of Meteorology
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