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Hi all!

There is a severe geomagnetic storm going on right now.
Solar wind magnetic fields are pointing sharply south.
Solar wind speed and density are low, though.
The source of this activity was a coronal mass ejection followed by a high speed solar wind stream flowing from a coronal hole.
Today the IMF should become weaker but solar wind speed is expected to rise.
This will lead to a further ongoing geomagnetic storm.
Auroral activity might become visible to middle latitudes during times of bigger substorms.
Last night (10/08-09) photographic aurora was reported for more than 4 hours from northern Germany.
This corresponds to regions well south of the US/Canadian border.
So keep your eyes and cameras watching the northern sky.
Clear skies!

 Ulrich

Great photos, Tom.

Oh yes, here in southern Finland we finally had some clear skies during decent auroral event. On the sep 3/4 night we had decent activity in the evening with tall arc, some rays and quite a few belts low in the horison. Then after midnight much bigger substorm with decent and quite bright curtain. Both active periods lasted quite some time, unlike the much brighter big stuff in last february and march, when in both times the "big" aurora was over in few minutes.

http://tomeklund.kuvat.fi/kuvat/aurora/2012/03+sep/

Wow, pretty big and nice auroras for your area!

Nice. We've had clouds since the CME. Sigh.

A colleague of mine is seeing significant auroras over mid-Vancouver Island (Parksville).  Nothing visible from here near Victoria.  He reported via facebook tall  rays, and widespread greenish curtains.  Seen around 0500UT. His preliminary pics:
http://rascvic.zenfolio.com/joe/h4194ce82#h4194ce82


~Sherry.

Hi all!

As the IMF (Bt-value) declines, the main phase of this nice geomagnetic storm is over.
But, due to the long duration of this event and the still ongoing southward pointing of the solar wind magnetic field, we should still observe a few strong substorms.
Those could lead to at least photographic aurora over middle latitudes.
So, if you have a clear and dark sky. Take a series of pictures tonight and you might catch another (final) round of aurora borealis or australis.
Clear skies!

 Ulrich

Middle Latitude Auroral Activity WARNING Issued:02:50 UTC, 14 July 2012
Solar Terrestrial Dispatch www.spacew.com

A potentially strong coronal mass ejection related to a recent X-class solar flare will impact the Earth within the next 12 hours and increase the risk substantially for auroral storm activity. Major auroral storming may be observed over the middle latitude regions during the next 12 to 36 hours. Observations of activity from low latitudes may also be sporadically possible.

End of WARNING statement