[Ips-dsgr] SWS Daily Report - 30 August 18 issued 2330 UT on 30 Aug 2018 [SEC=UNCLASSIFIED]

Regional Warning Centre rwc at ips.gov.au
Fri Aug 31 09:30:26 EST 2018


SUBJ: SWS DAILY SOLAR AND GEOPHYSICAL REPORT
ISSUED AT 2330UT/30 AUGUST 2018 BY Space Weather Services
FROM THE AUSTRALIAN SPACE FORECAST CENTRE
SUMMARY FOR 30 AUGUST AND FORECAST FOR 31 AUGUST - 02 SEPTEMBER
STATUS INDICATORS SOL:GREEN   MAG:GREEN     ION: GREEN
-----------------------------------------------------------
1A. SOLAR SUMMARY
Activity 30 Aug:  Very low

Flares: none.

Observed 10.7 cm flux/Equivalent Sunspot Number for 30 Aug:  68/2


1B. SOLAR FORECAST
             31 Aug             01 Sep             02 Sep
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 for 30 Aug. There are no 
sunspots on the visible disc. No Earth-directed CMEs were observed 
in the available LASCO imagery up to 30/1812 UT. During the last 
UT day, 30 Aug, the solar wind speed was elevated and gradually 
decreasing from 500 km/s to 440 km/s up to 0940 UT, then it dropped 
to 407 km/s and varied in the range 360-407 km/s during the remainder 
of the UT day. The IMF Bt was in the range 2-5 nT, gradually 
increasing on average. The Bz component of IMF was varying from 
-2 to +2 nT without significant periods of negative Bz. Solar 
activity is expected to remain at Very Low levels for the next 
3 UT days, 31 Aug and 1-2 Sep. Solar wind speed is expected to 
remain near its nominal levels over the next 24 hours.

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2A. MAGNETIC SUMMARY

Geomagnetic field for Australian Region 30 Aug: Quiet

Estimated Indices 30 Aug : A   K           
   Australian Region       2   11200011
      Cocos Island         1   10110010
      Darwin               2   11200011
      Townsville           3   22200011
      Learmonth            2   11200011
      Alice Springs        2   01200011
      Culgoora             2   11200011
      Gingin               2   11200021
      Canberra             1   11200000
      Launceston           3   12300011
      Hobart               2   12200011    

Estimated Antarctic Regional K Indices 30 Aug :
      Macquarie Island     1   11100000
      Casey               10   34400121
      Mawson              14   32212054
      Davis               62   23225931

Observed Regional daily pc3 Indices 30 Aug : 
      Darwin               0   (Quiet)
      Townsville           0   (Quiet)
      Learmonth            0   (Quiet)
      Alice Springs        0   (Quiet)
      Gingin               0   (Quiet)
      Canberra             2   (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 30 Aug : A 
           Fredericksburg         5
           Planetary              5                         

Observed AFr/Ap Indices 29 Aug :  A   K
           Fredericksburg         7
           Planetary              6   2211 1222     


2B. MAGNETIC FORECAST 
Date      Ap    Conditions
31 Aug     7    Quiet
01 Sep     6    Quiet
02 Sep     6    Quiet

COMMENT: Quiet conditions were observed in the Australian region 
during the UT day 30 Aug. Antarctic region experienced mostly 
Quiet to Active conditions during the last 24 hours. Quiet global 
geomagnetic conditions are expected for the next 3 UT days, 31 
Aug and 1-2 Sep.

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3A. GLOBAL HF PROPAGATION SUMMARY
	            Latitude Band
Date        Low            Middle         High 
30 Aug      Normal         Normal         Normal-poor    

PCA Event : No event.

3B. GLOBAL HF PROPAGATION FORECAST
	            Latitude Band
Date        Low            Middle         High 
31 Aug      Normal         Normal         Normal-poor
01 Sep      Normal         Normal         Normal-poor
02 Sep      Normal         Normal         Normal-poor

COMMENT: Mostly normal HF conditions were observed over the last 
24 hours with near predicted monthly MUFs. Incidents of poor 
ionospheric support were observed at high latitudes in the southern 
hemisphere during local night. Similar HF conditions are expected 
for the next 3 UT days, 31 Aug and 1-2 Sep.

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


Date   T index
30 Aug    -1

Observed Australian Regional MUFs
   Cocos Island Region:
      No data available during local day.
      No data available during local night.
   Niue Island Region:
      Near predicted monthly values during local day.
      Enhanced by 25% during local night.
   Northern Australian Region:
      Depressed by 15% during local day.
      Near predicted monthly values during local night.
   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
Jul      6
Aug      -3
Sep      -4

4B. AUSTRALIAN REGION IONOSPHERIC FORECAST
Date   T index  MUFs
31 Aug    -3    Near predicted monthly values
01 Sep    -3    Near predicted monthly values
02 Sep    -3    Near predicted monthly values

COMMENT: During 30 Aug MUFs were mostly near predicted monthly 
values across the Aus/NZ region. Mildly depressed MUFs were observed 
across the Northern Australian region during local day. In Antarctica, 
MUFs were near predicted monthly values if F layer existed, i.e. 
mostly during local day. Incidents of poor ionospheric support 
were observed in Antarctica during local night. Mostly near predicted 
monthly MUFs are expected for the next 3 UT days, 31 Aug and 
1-2 Sep, across the Aus/NZ region.

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

GOES satellite data for 29 Aug
       Daily Proton Fluence >1 MeV:   1.7E+06
       Daily Proton Fluence >10 MeV:  1.7E+04
       Daily Electron Fluence >2 MeV: 3.10E+09   (very high fluence)
Electron Fluence Daily Deep Dielectric Discharge Probability:42%
Fluence (flux accumulation over 24hrs)/ cm2-ster-day.
       X-ray background: A1.2

DSCOVR Satellite Solar Wind Day Averaged Data for 29 Aug
Speed: 531 km/sec  Density:    4.8 p/cc  Temp:   310000 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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