[Ips-dsgr] SWS Daily Report - 01 April 20 issued 2348 UT on 01 Apr 2020

Thu Apr 2 10:48:36 EST 2020

SUBJ: SWS DAILY SOLAR AND GEOPHYSICAL REPORT
ISSUED AT 2330UT/01 APRIL 2020 BY Space Weather Services
FROM THE AUSTRALIAN SPACE FORECAST CENTRE
SUMMARY FOR 01 APRIL AND FORECAST FOR 02 APRIL - 04 APRIL
STATUS INDICATORS SOL:GREEN   MAG:GREEN     ION: GREEN
-----------------------------------------------------------
1A. SOLAR SUMMARY
Activity 01 Apr:  Very low

Flares: none.

Observed 10.7 cm flux/Equivalent Sunspot Number for 01 Apr:  69/3

1B. SOLAR FORECAST
             02 Apr             03 Apr             04 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 01Apr. There is currently 
one numbered region on the visible disc, region 2759 located 
at N28E40 which has remained quiet and relatively unchanged over 
the last 24 hours. No earth-directed CMEs observed in available 
coronagraph imagery. The solar wind speed was ~500km/s at 00UT 
and gradually declined over the UT day to be 412km/s at the time 
of this report. The north-south component of interplanetary magnetic 
field (Bz) ranged between +/-3nT. Solar wind speeds are expected 
to gradually decline due to the waning influence of the recent 
negative polarity south polar extension coronal hole. Solar activity 
is expected to be Very Low for the next three days.

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

Geomagnetic field for Australian Region 01 Apr: Quiet

Estimated Indices 01 Apr : A   K           
   Australian Region       3   12100211
      Cocos Island         2   11100111
      Darwin               2   12100101
      Townsville           4   22110211
      Learmonth            4   12110221
      Alice Springs        2   12100101
      Gingin               2   11100211
      Canberra             2   12100100
      Hobart               4   12211211    

Estimated Antarctic Regional K Indices 01 Apr :
      Macquarie Island     3   12211110
      Casey               10   33411222
      Mawson              22   25221355

Observed Regional daily pc3 Indices 01 Apr : 
      Darwin               0   (Quiet)
      Townsville           0   (Quiet)
      Learmonth            0   (Quiet)
      Alice Springs        2   (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 01 Apr : A 
           Fredericksburg         6
           Planetary              6                         

Observed AFr/Ap Indices 31 Mar :  A   K
           Fredericksburg        10
           Planetary             13   4432 3222     

2B. MAGNETIC FORECAST 
Date      Ap    Conditions
02 Apr     7    Quiet
03 Apr     6    Quiet
04 Apr     5    Quiet

COMMENT: Quiet geomagnetic conditions observed for the Australian 
region 01Apr with Antarctic regions experiencing Unsettled to 
Active conditions. Quiet conditions expected for the Australian 
region over the next 3 days with Quiet to Unsettled conditions 
for Antarctic regions.

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

PCA Event : No event.

3B. GLOBAL HF PROPAGATION FORECAST
	            Latitude Band
Date        Low            Middle         High 
02 Apr      Normal         Normal         Normal-fair
03 Apr      Normal         Normal         Normal-fair
04 Apr      Normal         Normal         Normal-fair

COMMENT: Maximum usable frequencies (MUFs) were mostly near predicted 
monthly values to slightly enhanced for Low-Mid latitudes 01Apr. 
Periods of disturbed ionospheric support for High latitudes. 
Similar conditions are expected for the next 3 days.

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

Date   T index
01 Apr    -1

Observed Australian Regional MUFs
   Cocos Island Region:
      Near predicted monthly values during local day.
      Enhanced by 25% during local night.
      Enhanced by 20% after local dawn.
   Niue Island Region:
      Near predicted monthly values during local day.
      Enhanced by 15% during local night.
      Depressed by 20% after local dawn.
   Northern Australian Region:
      Near predicted monthly values during local day.
      Enhanced by 20% during local night.
      Enhanced by 25% after local dawn.
   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
Mar      1
Apr      -14
May      -14

4B. AUSTRALIAN REGION IONOSPHERIC FORECAST
Date   T index  MUFs
02 Apr     0    Near predicted monthly values
03 Apr     0    Near predicted monthly values
04 Apr     5    Near to 15% above predicted monthly values

COMMENT: Maximum Usable frequencies (MUFs) ranged from near predicted 
monthly values to enhanced for Equatorial, Northern AUS and Southern 
AUS/NZ regions on 01Apr. Notable sporadic E observed at SWS stations 
Cocos Is, Darwin, Brisbane and Norfolk Is. Some periods of disturbed 
ionospheric support for Antarctic regions. MUFs are expected 
to range from near predicted monthly values to slightly enhanced 
for Equatorial, Northern AUS and Southern AUS/NZ region for the 
next 3 days with occasional disturbed periods for Antarctic regions.

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

GOES satellite data for 31 Mar
       Daily Proton Fluence >1 MeV:   9.4E+04
       Daily Proton Fluence >10 MeV:  4.6E+04
       Daily Electron Fluence >2 MeV: 9.00E+06   (normal fluence)
Electron Fluence Daily Deep Dielectric Discharge Probability: 2%
Fluence (flux accumulation over 24hrs)/ cm2-ster-day.
       X-ray background: A1.2

DSCOVR Satellite Solar Wind Day Averaged Data for 31 Mar
Speed: 499 km/sec  Density:    9.2 p/cc  Temp:   283000 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 

IMPORTANT: This e-mail, including any attachments, may contain,
confidential or copyright information.  The views expressed in 
this message are those of the individual sender, unless 
specifically stated to be the views of SWS.  If you are not 
the intended recipient, please contact the sender immediately 
and delete all copies of this e-mail and attachments. 
To unsubscribe from an IPS mail list either send an email to 
"MAIL_LIST"-leave at ips.gov.au or go to
http://www.sws.bom.gov.au/mailman/listinfo/"MAIL_LIST".
Information about training can be obtained from
http://www.sws.bom.gov.au/mailman/listinfo/ips-training.
General information is available from
http://www.sws.bom.gov.au/mailman/listinfo/ips-info.