[Ips-dsgr] SWS Daily Report - 27 April 18 issued 2330 UT on 27 Apr 2018 [SEC=UNCLASSIFIED]

Regional Warning Centre rwc at ips.gov.au
Sat Apr 28 09:30:22 EST 2018 

SUBJ: SWS DAILY SOLAR AND GEOPHYSICAL REPORT
ISSUED AT 2330UT/27 APRIL 2018 BY Space Weather Services
FROM THE AUSTRALIAN SPACE FORECAST CENTRE
SUMMARY FOR 27 APRIL AND FORECAST FOR 28 APRIL - 30 APRIL
STATUS INDICATORS SOL:GREEN   MAG:GREEN     ION: GREEN
-----------------------------------------------------------
1A. SOLAR SUMMARY
Activity 27 Apr:  Very low

Flares: none.

Observed 10.7 cm flux/Equivalent Sunspot Number for 27 Apr:  69/3


1B. SOLAR FORECAST
             28 Apr             29 Apr             30 Apr
Activity     Very low           Very low           Very low
Fadeouts     None expected      None expected      None expected
10.7cm/SSN    69/3               69/3               69/3

COMMENT: Solar activity was at very low levels today (UT day 
27 April). No Earth-directed CMEs were observed in the available 
imagery during the last 24 hours. The solar wind speed varied 
from 330 km/s to 390 km/s through the UT day today. The IMF Bt 
varied mostly between 1 and 9 nT and the Bz component of IMF 
fluctuated between +5/-5 nT during most parts of the day today 
reaching negative up to -7.7 nT at 1433 UT. Very Low levels of 
solar flare activity are expected for the next three UT days, 
28-30 April.

-----------------------------------------------------------
2A. MAGNETIC SUMMARY

Geomagnetic field for Australian Region 27 Apr: Quiet

Estimated Indices 27 Apr : A   K           
   Australian Region       4   21011212
      Cocos Island         3   11111211
      Darwin               3   20011212
      Townsville           3   210-----
      Learmonth            4   21011212
      Alice Springs        4   21011212
      Culgoora             3   11011212
      Gingin               4   11001312
      Canberra             2   10001211
      Launceston           5   21011312
      Hobart               1   100-----    

Estimated Antarctic Regional K Indices 27 Apr :
      Macquarie Island     1   10000210
      Casey                7   23210322
      Mawson               8   41111223

Observed Regional daily pc3 Indices 27 Apr : 
      Darwin               0   (Quiet)
      Townsville           0   (Quiet)
      Learmonth            0   (Quiet)
      Alice Springs        0   (Quiet)
      Gingin               0   (Quiet)
      Canberra             4   (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 Apr : A 
           Fredericksburg         5
           Planetary              6                         

Observed AFr/Ap Indices 26 Apr :  A   K
           Fredericksburg         4
           Planetary              5   2111 2112     


2B. MAGNETIC FORECAST 
Date      Ap    Conditions
28 Apr     5    Quiet
29 Apr     4    Quiet
30 Apr     4    Quiet

COMMENT: Geomagnetic conditions were quiet across the Australian 
region during the UT day 27 April. Geomagnetic conditions in 
the region are expected to stay at quiet levels for the next 
three days (28 to 30 April).

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

PCA Event : No event.

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

COMMENT: MUFs were mainly near predicted monthly values today 
(UT day 27 April) with periods of minor to moderate MUF enhancements 
recorded in some mid- and high- latitude areas on this day. HF 
conditions may be expected to stay mostly at normal levels for 
the next three days (28 to 30 April).

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


Date   T index
27 Apr     5

Observed Australian Regional MUFs
   Niue Island Region:
      No data available during local day.
      Near predicted monthly values during local night.
   Northern Australian Region:
      Near predicted monthly values during local day.
      No data available during local night.
   Southern Australian Region:
      Near predicted monthly values during local day.
      Enhanced by 15% during local night.
   Antarctic Region (Casey/Scott Base/Davis/Mawson):
      Enhanced by 30% over the UT day.

Monthly T index:
Month  T index
Mar      2
Apr      2
May      1

4B. AUSTRALIAN REGION IONOSPHERIC FORECAST
Date   T index  MUFs
28 Apr     6    Near predicted monthly values
29 Apr     6    Near predicted monthly values
30 Apr     6    Near predicted monthly values

COMMENT: MUFs were mainly near predicted monthly values over 
most of the Aus/NZ region with periods of minor to moderate MUF 
enhancements recorded in some southern areas on UT day 27 April. 
HF conditions may be expected to stay mostly at normal levels 
in the region for the next three days (28 to 30 April).

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

GOES satellite data for 26 Apr
       Daily Proton Fluence >1 MeV:   1.2E+06
       Daily Proton Fluence >10 MeV:  1.7E+04
       Daily Electron Fluence >2 MeV: 1.70E+08   (moderate fluence)
Electron Fluence Daily Deep Dielectric Discharge Probability:14%
Fluence (flux accumulation over 24hrs)/ cm2-ster-day.
       X-ray background: A3.1

DSCOVR Satellite Solar Wind Day Averaged Data for 26 Apr
Speed: 361 km/sec  Density:    6.9 p/cc  Temp:    27100 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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