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Thursday, April 20, 2017

 

Aurora happening NOW (20 April)

Aurora are being reported now in Tasmania from Taranna and Doges Ferry. Cloud is still an issue though. Hobart Kindex is currently 4 with Velocity: 591 km/sec Bz: 0.0 nT Density = 12.0 p/cc  a bit ordinary, but further G1 storms are predicted for tonight/tomorrow morning and it is likely that the aurora will die down and flare up again during the night and early morning. (see also NOAA)

Dark sky sites have the best chance of seeing anything, and always allow around 5 minutes for your eyes to become dark adapted.As always look to the south for shifting red/green glows, beams have been reported consistently over the last few aurora, as well as bright proton arcs and "picket fences".

Here is the near-real time satellite view of the clouds http://satview.bom.gov.au/
Cloud cover predictions can be found at SkippySky.  

The all sky aurora camera in Northern Tasmania at Cressy is being upgraded and is not yet online.

SUBJ: SWS GEOMAGNETIC DISTURBANCE WARNING 17/19
ISSUED AT 2345UT/18 APRIL 2017
BY THE AUSTRALIAN SPACE FORECAST CENTRE.

Recurrent positive polarity coronal hole is expected to be geoeffective.

INCREASED GEOMAGNETIC ACTIVITY EXPECTED
DUE TO CORONAL HOLE HIGH SPEED WIND STREAM
FROM 19-20 APRIL 2017
_____________________________________________________________

GEOMAGNETIC ACTIVITY FORECAST
19 Apr:  Active
20 Apr:  Unsettled to Active

==============================================================
SUBJ: SWS AURORA WATCH
ISSUED AT 0315 UT ON 20 Apr 2017 by Space Weather Services
FROM THE AUSTRALIAN SPACE FORECAST CENTRE

The Earth is now under influence of the High Speed Stream from a
recurrent coronal hole. The geomagnetic activity has reached Minor
Storm level. This may result in increased chances of auroral activity.
Auroras may be visible on the local night of 20-21 April in Tasmania
and possibly near the coastline of Victoria.

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