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Wednesday, April 22, 2015

 

Geomagnetic Alert (22 April, 2015)

A geomagnetic alert has been issued by the Australian IPS for the 22nd (yes tonight) to possibly the morning of the 23rd due to a high speed solar wind stream from a coronal hole. Geomagnetic activity is rated at "Unsettled to Active, isolated minor storm periods possible." Aurora, if they occur, are likely to be seen only in Tasmania (possibly Victoria if the minor storm eventuates)

Aurora can occur at any time after nightfall (although around midnight or just after seems to be common). 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 and a large green "blob" has been seen.

The all sky aurora camera in Southern Tasmania at Cressy may be helpful.
<http://www.ips.gov.au/Geophysical/4/2>

SUBJ: IPS GEOMAGNETIC DISTURBANCE WARNING 15/14
ISSUED AT 2339UT/21 APRIL 2015
BY THE AUSTRALIAN SPACE FORECAST CENTRE.

Due to continued effect of a high speed solar wind stream from
a coronal hole, isolated periods of minor geomagnetic storm may
be observed on 22 April.

INCREASED GEOMAGNETIC ACTIVITY EXPECTED
DUE TO CORONAL HOLE HIGH SPEED WIND STREAM
FOR 22 APRIL 2015
_____________________________________________________________

GEOMAGNETIC ACTIVITY FORECAST
22 Apr:  Unsettled to Active, isolated minor storm periods possible

Further monitoring at
http://www.ips.gov.au

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