[Ips-dsgr] SWS Daily Report - 07 April 20 issued 2333 UT on 07 Apr 2020

Wed Apr 8 09:33:39 EST 2020

SUBJ: SWS DAILY SOLAR AND GEOPHYSICAL REPORT
ISSUED AT 2330UT/07 APRIL 2020 BY Space Weather Services
FROM THE AUSTRALIAN SPACE FORECAST CENTRE
SUMMARY FOR 07 APRIL AND FORECAST FOR 08 APRIL - 10 APRIL
STATUS INDICATORS SOL:GREEN   MAG:GREEN     ION: GREEN
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1A. SOLAR SUMMARY
Activity 07 Apr:  Very low

Flares: none.

Observed 10.7 cm flux/Equivalent Sunspot Number for 07 Apr:  70/5

1B. SOLAR FORECAST
             08 Apr             09 Apr             10 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 for 07 Apr with a B4.5 flare 
from a plage (Ex region 2579). Very Low levels of solar activity 
are expected for the next three days, 08-10 Apr. GONG Halpha 
images showed an unstable filament in the NW quadrant, near the 
plage. No Earth-directed CMEs were observed in the available 
coronagraph imagery. During the last 24 hours, the solar wind 
speed remained near nominal levels, under 340 km/s. The total 
IMF (Bt) varied between 3 nT and 6 nT. The north-south component 
of IMF, Bz, was mostly neutral until 07/1400 UT then turned south 
up to -5 nT. The solar wind speed is expected to be mostly near 
its background levels for the next three days, 08-10 Apr, although 
some slight enhancements may be observed due to weak isolated 
coronal holes.

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2A. MAGNETIC SUMMARY

Geomagnetic field for Australian Region 07 Apr: Quiet

Estimated Indices 07 Apr : A   K           
   Australian Region       0   00000011
      Darwin               0   00000011
      Townsville           1   11100011
      Learmonth            2   00001022
      Alice Springs        0   00000011
      Gingin               1   00000022
      Canberra             0   00000001
      Hobart               1   10101011    

Estimated Antarctic Regional K Indices 07 Apr :
      Macquarie Island     0   00000000
      Casey                6   12311122
      Mawson              25   11110175

Observed Regional daily pc3 Indices 07 Apr : 
      Darwin               0   (Quiet)
      Townsville           0   (Quiet)
      Learmonth            0   (Quiet)
      Alice Springs        0   (Quiet)
      Gingin               0   (Quiet)
      Canberra             9   (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 07 Apr : A 
           Fredericksburg         2
           Planetary              3                         

Observed AFr/Ap Indices 06 Apr :  A   K
           Fredericksburg         2
           Planetary              3   1111 1101     

2B. MAGNETIC FORECAST 
Date      Ap    Conditions
08 Apr     8    Quiet to Unsettled
09 Apr     8    Quiet to Unsettled
10 Apr     8    Quiet to Unsettled

COMMENT: Quiet geomagnetic conditions were observed for the Australian 
region on UT day 07 Apr. Global geomagnetic activity is expected 
to be mostly at Quiet levels for the next three days, 08-10 Apr 
and a times may reach Unsettled levels due to weak coronal hole 
effects.

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3A. GLOBAL HF PROPAGATION SUMMARY
	            Latitude Band
Date        Low            Middle         High 
07 Apr      Normal         Normal         Normal         

PCA Event : No event.

3B. GLOBAL HF PROPAGATION FORECAST
	            Latitude Band
Date        Low            Middle         High 
08 Apr      Normal         Normal         Normal
09 Apr      Normal         Normal         Normal
10 Apr      Normal         Normal         Normal

COMMENT: Mostly normal HF propagation conditions are expected 
for the next three days, 08-10 Apr.

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4A. AUSTRALIAN REGION IONOSPHERIC SUMMARY

Date   T index
07 Apr    -4

Observed Australian Regional MUFs
   Cocos Island Region:
      Enhanced by 15% during local day.
      Enhanced by 40% during local night.
   Niue Island Region:
      Near predicted monthly values.
   Northern Australian Region:
      Depressed by 15% during local day.
      Near predicted monthly values during local night.
   Southern Australian Region:
      Near predicted monthly values during local day.
      Enhanced by 30% 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
Mar      1
Apr      -14
May      -14

4B. AUSTRALIAN REGION IONOSPHERIC FORECAST
Date   T index  MUFs
08 Apr    -5    Near predicted monthly values
09 Apr    -5    Near predicted monthly values
10 Apr    -5    Near predicted monthly values

COMMENT: Maximum usable frequencies (MUFs) were near predicted 
monthly values to slightly enhanced for the Australian region 
on 07 Apr. Mild MUFs enhancements observed at Cocos Island region 
local night. Sporadic-E occurrences were seen over some sites. 
Similar levels of ionospheric support is expected for the next 
three days, 08-10 Apr.

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5. SPACE ENVIRONMENT SUMMARY

GOES satellite data for 06 Apr
       Daily Proton Fluence >1 MeV:   5.9E+04
       Daily Proton Fluence >10 MeV:  4.6E+04
       Daily Electron Fluence >2 MeV: 1.20E+07   (normal fluence)
Electron Fluence Daily Deep Dielectric Discharge Probability: 2%
Fluence (flux accumulation over 24hrs)/ cm2-ster-day.
       X-ray background: A1.0

DSCOVR Satellite Solar Wind Day Averaged Data for 06 Apr
Speed: 357 km/sec  Density:    3.2 p/cc  Temp:    30300 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
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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