[Ips-dsgr] SWS Daily Report - 27 June 19 issued 2331 UT on 27 Jun 2019

Fri Jun 28 09:31:25 EST 2019

SUBJ: SWS DAILY SOLAR AND GEOPHYSICAL REPORT
ISSUED AT 2330UT/27 JUNE 2019 BY Space Weather Services
FROM THE AUSTRALIAN SPACE FORECAST CENTRE
SUMMARY FOR 27 JUNE AND FORECAST FOR 28 JUNE - 30 JUNE
STATUS INDICATORS SOL:GREEN   MAG:GREEN     ION: GREEN
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1A. SOLAR SUMMARY
Activity 27 Jun:  Very low

Flares: none.

Observed 10.7 cm flux/Equivalent Sunspot Number for 27 Jun:  67/0

1B. SOLAR FORECAST
             28 Jun             29 Jun             30 Jun
Activity     Very low           Very low           Very low
Fadeouts     None expected      None expected      None expected
10.7cm/SSN    67/0               67/0               67/0

COMMENT: Solar activity remained Very Low on UT day 27 June. 
The visible solar disk is now spotless. Very Low solar activity 
is expected for the next 3 UT days, 28-30 June. There were no 
Earth-directed CMEs observed in the available coronagraph imagery. 
On UT day 27 June, the solar wind speed gradually declined from 
a peak of 409 km/s at 27/0409 UT, currently varying between 340-360 
km/s. The total IMF (Bt) varied between 1-5 nT. The north-south 
component of the IMF (Bz) varied between -4 to 2 nT. The solar 
wind is expected to remain at background levels for the next 
3 UT days, 28-30 June.

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2A. MAGNETIC SUMMARY

Geomagnetic field for Australian Region 27 Jun: Quiet

Estimated Indices 27 Jun : A   K           
   Australian Region       0   10001000
      Cocos Island         0   10010000
      Darwin               1   10001001
      Townsville           1   10001001
      Learmonth            1   11101010
      Alice Springs        0   10001000
      Culgoora             1   11001000
      Gingin               0   00001010
      Canberra             0   10001000
      Launceston           1   10002000
      Hobart               0   10001000    

Estimated Antarctic Regional K Indices 27 Jun :
      Macquarie Island     0   00001000
      Casey                2   21111010
      Mawson              10   32001244
      Davis                9   12110053

Observed Regional daily pc3 Indices 27 Jun : 
      Darwin               0   (Quiet)
      Townsville           0   (Quiet)
      Learmonth            0   (Quiet)
      Alice Springs        0   (Quiet)
      Gingin               0   (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 27 Jun : A 
           Fredericksburg         4
           Planetary              5                         

Observed AFr/Ap Indices 26 Jun :  A   K
           Fredericksburg         5
           Planetary              6   2222 1112     

2B. MAGNETIC FORECAST 
Date      Ap    Conditions
28 Jun     5    Quiet
29 Jun     5    Quiet
30 Jun     5    Quiet

COMMENT: Geomagnetic activity was at Quiet levels across the 
Australian region for the UT day 27 June. Mainly Quiet levels 
were observed in the Antarctic region, with some isolated Unsettled 
to Minor Storm periods. Global geomagnetic activity is expected 
to be at mostly Quiet levels on 28-30 June.

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

PCA Event : No event.

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

COMMENT: Mostly normal HF conditions were observed on UT day 
27 June. Nearly similar HF conditions may be expected for the 
next 3 UT days, 28-30 June.

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4A. AUSTRALIAN REGION IONOSPHERIC SUMMARY

Date   T index
27 Jun    -8

Observed Australian Regional MUFs
   Cocos Island Region:
      Near predicted monthly values.
   Niue Island Region:
      Near predicted monthly values during local day.
      Enhanced by 30% during local night.
   Northern Australian Region:
      Near predicted monthly values.
   Southern Australian Region:
      Near predicted monthly values.
   Antarctic Region (Casey/Scott Base/Davis/Mawson):
      Near predicted monthly values over the UT day.

Monthly T index:
Month  T index
May      2
Jun      -11
Jul      -12

4B. AUSTRALIAN REGION IONOSPHERIC FORECAST
Date   T index  MUFs
28 Jun    -8    Near predicted monthly values
29 Jun    -8    Near predicted monthly values
30 Jun    -8    Near predicted monthly values

COMMENT: Maximum usable frequencies (MUFs) ranged mostly from 
near predicted monthly values to slightly enhanced at times for 
all regions today, UT day 27 June. Sporadic-E and Spread F occurrences 
were observed over some Australian sites. For UT days 28-30 June, 
MUFs are expected to range mostly near predicted monthly levels.

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5. SPACE ENVIRONMENT SUMMARY

GOES satellite data for 26 Jun
       Daily Proton Fluence >1 MeV:   3.6E+05
       Daily Proton Fluence >10 MeV:  2.0E+04
       Daily Electron Fluence >2 MeV: 1.90E+06   (normal fluence)
Electron Fluence Daily Deep Dielectric Discharge Probability: 1%
Fluence (flux accumulation over 24hrs)/ cm2-ster-day.
       X-ray background: A6.8

DSCOVR Satellite Solar Wind Day Averaged Data for 26 Jun
Speed: 388 km/sec  Density:    6.4 p/cc  Temp:    59700 K  Bz:   0 nT

(Courtesy Space Weather Prediction Center, Boulder USA)
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Space Weather Services              email: asfc at bom.gov.au
Bureau of Meteorology
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Haymarket NSW 1240  AUSTRALIA       FTP: ftp://ftp-out.sws.bom.gov.au
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