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

Regional Warning Centre rwc at ips.gov.au
Sun Jun 21 09:31:24 EST 2020


SUBJ: SWS DAILY SOLAR AND GEOPHYSICAL REPORT
ISSUED AT 2330UT/20 JUNE 2020 BY Space Weather Services
FROM THE AUSTRALIAN SPACE FORECAST CENTRE
SUMMARY FOR 20 JUNE AND FORECAST FOR 21 JUNE - 23 JUNE
STATUS INDICATORS SOL:GREEN   MAG:GREEN     ION: GREEN
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1A. SOLAR SUMMARY
Activity 20 Jun:  Very low

Flares: none.

Observed 10.7 cm flux/Equivalent Sunspot Number for 20 Jun:  68/2


1B. SOLAR FORECAST
             21 Jun             22 Jun             23 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 20 June. Very 
low solar activity is expected for the next three UT days, 21-23 
June. There are currently no numbered active regions on the solar 
disk. No returning regions are expected. No Earthward directed 
CMEs were observed in the available coronagraph images. During 
UT day 20 June, the solar wind first showed a gradual increase 
from 325 km/s to 360 km/s by 04:30 UT and then showed a gradual 
decrease to around 310 km/s by 23:00UT. During this time, the 
total IMF (Bt) varied between 1 and 7 nT and the north-south 
IMF component (Bz) varied mostly between +1 nT and +4 nT, but 
also stayed negative (up to -7 nT) between 02:00 UT and 08:00 
Ut. The solar wind particle density varied between 6 and 20 ppcc. 
Solar wind conditions are expected to remain mostly at background 
levels on UT days 21 to 23 June.

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2A. MAGNETIC SUMMARY

Geomagnetic field for Australian Region 20 Jun: Quiet

Estimated Indices 20 Jun : A   K           
   Australian Region       3   22210000
      Cocos Island         2   22110000
      Darwin               3   22210000
      Townsville           2   21210001
      Learmonth            3   22210000
      Alice Springs        3   22210000
      Gingin               2   21200000
      Canberra             2   21200000
      Hobart               3   22210000    

Estimated Antarctic Regional K Indices 20 Jun :
      Macquarie Island     1   01210000
      Casey                3   22211000
      Mawson              14   52321214

Observed Regional daily pc3 Indices 20 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 20 Jun : A 
           Fredericksburg         5
           Planetary              6                         

Observed AFr/Ap Indices 19 Jun :  A   K
           Fredericksburg         7
           Planetary              5   1101 1122     


2B. MAGNETIC FORECAST 
Date      Ap    Conditions
21 Jun     5    Quiet
22 Jun     5    Quiet
23 Jun     5    Quiet

COMMENT: On UT day 20 June, geomagnetic conditions were quiet 
in the Australian region and mainly quiet in the Antarctic region, 
with two isolated unsettled periods and one minor storm period 
too. Global geomagnetic activity is expected to be mostly at 
quiet levels for UT days 21 to 23 June.

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

PCA Event : No event.

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

COMMENT: MUFs were near predicted monthly values to moderately 
enhanced levels on UT day 20 June. Sporadic E was observed over 
some sites. MUFs are expected to be mostly near monthly predicted 
to mildly enhanced levels for the next three UT days, 21 to 23 
June.

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


Date   T index
20 Jun    -2

Observed Australian Regional MUFs
   Cocos Island Region:
      Near predicted monthly values.
   Niue Island Region:
      Near predicted monthly values during local day.
      Enhanced by 60% during local night.
   Northern Australian Region:
      Near predicted monthly values.
   Southern Australian Region:
      Near predicted monthly values during local day.
      Enhanced by 20% during local night.
   Antarctic Region (Casey/Scott Base/Davis/Mawson):
      Enhanced by 30% 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
21 Jun    -5    Near predicted monthly values
22 Jun    -5    Near predicted monthly values
23 Jun    -5    Near predicted monthly values

COMMENT: MUFs were near predicted monthly values to moderately 
enhanced levels on UT day 20 June across the Australian regions. 
Sporadic E was observed over some Australian sites. MUFs in the 
Australian region are expected to be mostly near monthly predicted 
to mildly enhanced levels for the next three UT days, 21 to 23 
June.

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

GOES satellite data for 19 Jun
       Daily Proton Fluence >1 MeV:   1.8E+05
       Daily Proton Fluence >10 MeV:  4.7E+04
       Daily Electron Fluence >2 MeV: 1.20E+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 19 Jun
Speed: 314 km/sec  Density:    7.7 p/cc  Temp:    32300 K  Bz:   1 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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