Stargazing For those aurora chasers -- a heads up

[davenn]

2017-11-12 and the is exiting a solar wind stream that caused a number of nights of aurora for high latitude observers on both nthrn and sthrn hemispheres.
But the respite will be brief and 2 new coronal holes are going to cause another number of days of activity. This is likely to start around the 14th of Nov.

 

[davenn]

The 2 coronal hole regions shown above didn't produce any significantly large auroral displays.

In another 24 hours another, this time centrally located coronal hole may have a better chance in producing some
higher speed solar wind and resulting in better auroral displays ... we live in hope

that burst of faster solar wind should arrive around the 18 - 19th Nov. ... stay tuned
Dave

 

[davenn]

Aurora alert for those in high latitudes, 45 or greater deg N or S

My usual comment ... tho this is from a Southern Hemisphere warning centre, it is applicable to both nthrn and sthrn hemispheres

SWS GEOMAGNETIC DISTURBANCE WARNING 17/61
ISSUED AT 2258UT/15 DECEMBER 2017
BY THE AUSTRALIAN SPACE FORECAST CENTRE.

A high speed stream from a recurrent positive equatorial coronal
hole is expected to start affecting Earth from UT day 17 Dec.
The geomagnetic activity is expected reach active levels on UT
day 17 and 18 December and at times may reach up to minor storm
levels. There is some possibility that aurora may be visible
on the local night of 17 December from Tasmania and southern
parts of Victoria, Australia.

INCREASED GEOMAGNETIC ACTIVITY EXPECTED
DUE TO CORONAL HOLE HIGH SPEED WIND STREAM
FROM 17-18 DECEMBER 2017
_____________________________________________________________

GEOMAGNETIC ACTIVITY FORECAST
17 Dec: Active
18 Dec: Unsettled

Space Weather Services email: asfc@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