[Ips-dsgr] SWS Daily Report - 23 June 20 issued 2331 UT on 23 Jun 2020

Regional Warning Centre rwc at ips.gov.au
Wed Jun 24 09:31:25 EST 2020 

SUBJ: SWS DAILY SOLAR AND GEOPHYSICAL REPORT
ISSUED AT 2330UT/23 JUNE 2020 BY Space Weather Services
FROM THE AUSTRALIAN SPACE FORECAST CENTRE
SUMMARY FOR 23 JUNE AND FORECAST FOR 24 JUNE - 26 JUNE
STATUS INDICATORS SOL:GREEN   MAG:GREEN     ION: GREEN
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1A. SOLAR SUMMARY
Activity 23 Jun:  Very low

Flares: none.

Observed 10.7 cm flux/Equivalent Sunspot Number for 23 Jun:  67/0


1B. SOLAR FORECAST
             24 Jun             25 Jun             26 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 23 June. There 
are currently no numbered active regions on the visible solar 
disk. Very Low solar activity is expected for the next three 
UT days, 24-26 June. GONG Halpha imagery showed a filament structure 
in the NW quadrant, it is monitored for any lift off. A slow 
narrow CME was observed in STEREO imagery staring 22/1639UT but 
very faint in LASCO imagery. This event will be further analysed 
to determine if it has any earth directed component. No other 
Earthward directed CMEs were observed in the available coronagraph 
images. During UT day 23 June, the solar wind speed remained 
at nominal levels, near 300 km/s. The total IMF (Bt) varied between 
2-5 nT and the north-south IMF component (Bz) varied mostly between 
+/- 2 nT with a southward excursion up to -5 nT around 23/2000UT. 
The solar wind speed is expected to remain mostly near its background 
levels for the next three days, 24-26 June, although some slight 
enhancements may be observed due to weak coronal hole.

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2A. MAGNETIC SUMMARY

Geomagnetic field for Australian Region 23 Jun: Quiet

Estimated Indices 23 Jun : A   K           
   Australian Region       0   00000000
      Cocos Island         0   00100000
      Darwin               0   01000000
      Townsville           0   10100000
      Learmonth            0   00000001
      Alice Springs        0   00000000
      Gingin               0   00000000
      Canberra             0   00000000
      Hobart               0   00000000    

Estimated Antarctic Regional K Indices 23 Jun :
      Macquarie Island     0   00000000
      Casey                1   11100011
      Mawson               8   30321014

Observed Regional daily pc3 Indices 23 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 23 Jun : A 
           Fredericksburg         4
           Planetary              5                         

Observed AFr/Ap Indices 22 Jun :  A   K
           Fredericksburg         3
           Planetary              3   1001 1112     


2B. MAGNETIC FORECAST 
Date      Ap    Conditions
24 Jun     5    Quiet
25 Jun     5    Quiet
26 Jun    10    Quiet to Unsettled

COMMENT: On UT day 23 June, geomagnetic conditions were quiet 
in the Australian region and mainly quiet in the Antarctic region, 
with some isolated unsettled to active periods recorded on one 
Antarctic station. Global geomagnetic activity is expected to 
be at quiet levels for UT days 24-25 June. Conditions may increase 
to unsettled levels on 26 June due to minor coronal hole effects.

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

PCA Event : No event.

3B. GLOBAL HF PROPAGATION FORECAST
	            Latitude Band
Date        Low            Middle         High 
24 Jun      Normal         Normal         Normal
25 Jun      Normal         Normal         Normal
26 Jun      Normal         Normal         Normal

COMMENT: Mostly normal HF conditions are expected for the next 
three UT days, 24-26 June.

-----------------------------------------------------------
4A. AUSTRALIAN REGION IONOSPHERIC SUMMARY


Date   T index
23 Jun    -9

Observed Australian Regional MUFs
   Cocos Island Region:
      Near predicted monthly values.
   Niue Island Region:
      Near predicted monthly values during local day.
      Enhanced by 35% during local night.
   Northern Australian Region:
      Near predicted monthly values.
   Southern Australian Region:
      Near predicted monthly values during local day.
      Enhanced by 25% during local night.
   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
24 Jun    -5    Near predicted monthly values
25 Jun    -5    Near predicted monthly values
26 Jun    -5    Near predicted monthly values

COMMENT: MUFs were near predicted monthly values to slightly 
enhanced on UT day 23 June. 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, 24-26 June.

-----------------------------------------------------------
5. SPACE ENVIRONMENT SUMMARY

GOES satellite data for 22 Jun
       Daily Proton Fluence >1 MeV:   6.6E+04
       Daily Proton Fluence >10 MeV:  4.7E+04
       Daily Electron Fluence >2 MeV: 1.30E+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 22 Jun
Speed: 294 km/sec  Density:    4.5 p/cc  Temp:    12600 K  Bz:   0 nT

(Courtesy Space Weather Prediction Center, Boulder USA)
-----------------------------------------------------------

Space Weather Services              email: asfc at bom.gov.au
Bureau of Meteorology
PO Box 1386                         WWW: http://www.sws.bom.gov.au
Haymarket NSW 1240  AUSTRALIA       FTP: ftp://ftp-out.sws.bom.gov.au
tel: +61 2 9213 8010                fax: +61 2 9213 8060 

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