Aurora

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Tom
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Aurora

Post by Tom » August 5th, 2011, 7:39 pm

A lot of aurora activity is predicted for the next 24 hours due to several coronal mass ejections over the past few days. spaceweather.com is advising watchers at ALL latitudes to be on the alert. Maybe we will see something down here!

http://spaceweather.com/

Christopher K.
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Re: Aurora

Post by Christopher K. » August 9th, 2011, 6:25 pm

Tom wasn't kidding! A Utah astrophotographer captured red aurorae in that state on Saturday. In Europe, aurorae paid a visit as far south as England and Germany.

It looks like there was at least mild concern that the Thursday CME could affect the MESSENGER spacecraft and one of the STEREO spacecraft. I have checked yet to see any damage was done.

More information:
http://www.nasa.gov/mission_pages/sunea ... punch.html

Christopher K.
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Re: Aurora

Post by Christopher K. » March 3rd, 2012, 10:56 pm

A solar eruption on 24 February led to a mild CME hitting the Earth Sunday. This in turn resulted in some interesting auroral activity.

Too weak for a geomagnetic storm, strong enough for beautiful aurorae. That's the type of CME we like.

More information:
http://www.nasa.gov/mission_pages/sunea ... 2-cme.html

Christopher K.
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Location: Baton Rouge, LA

Re: Aurora

Post by Christopher K. » July 9th, 2012, 5:46 pm

Yesterday's APOD was a 1991 image showing both an aurorae and a volcanic explosion in the same frame. Photographer Sigurdur Stefnisson, I'm sure, was just going for the volcano! Known eruptions of Helka date back to the year 1104, although it's been quiet for a least eleven years. The eruption shown in the Stefnisson picture sent ash twelve kilometers up into the sky.

The image:
http://apod.nasa.gov/apod/ap120708.html

About Helka:
http://www.volcano.si.edu/world/volcano ... m=1702-07=
http://volcano.oregonstate.edu/vwdocs/v ... story.html

Christopher K.
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Re: Aurora

Post by Christopher K. » July 24th, 2012, 11:21 pm

APOD is wonderful. So many celestial phenomena I've seen for the first time in an APOD image. The image for the 25th is no exception. Pink aurora! The photographer was at Crater Lake National Park, imaging in the direction of Ursa Major and Perseus. Most known aurorae are green, red or blue depending on the activity's altitude. Sometimes an observer's viewpoint can experience different levels of aurorae, with color's merging into various secondaries--in this case, pink.

The image:
http://apod.nasa.gov/apod/ap120725.html

Crater Lake National Park:
http://www.nps.gov/crla/index.htm

Christopher K.
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Re: Aurora

Post by Christopher K. » February 7th, 2013, 3:00 pm

Aurorae were seen over the Indian Ocean on 17 September 2011. Three days earlier a coronal mass ejection left the Sun.

The top image at the link below (taken by Expedition 29 from the ISS with a Nikon DS3) was used as the July picture for the 2013 NASA Science calendar:
http://earthobservatory.nasa.gov/IOTD/view.php?id=52287

Christopher K.
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Re: Aurora

Post by Christopher K. » June 8th, 2014, 7:44 pm

Lijuan Guo sent to Spaceweather a really nice shot of aurorae from Vancouver. As the Earth is passing through the "wake" of a coronal mass ejection, those in the high latitudes should look for aurorae at least through tomorrow. (There was a Level 2 geomagnetic storm in the last twenty-four hours.)

The image:
http://spaceweathergallery.com/indiv_up ... 926kari4o2

Christopher K.
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Re: Aurora

Post by Christopher K. » July 30th, 2015, 6:29 pm

Nice aurorae were captured a couple of weeks ago at the Zhongshan Station in Antarctica. The Large and Small Magellanic Clouds are in the sky. There is some sort of array in the background to the left. I wonder what it is...
http://apod.nasa.gov/apod/ap150727.html

Christopher K.
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Re: Aurora

Post by Christopher K. » August 15th, 2015, 4:38 pm

I've never heard of a proton arc, much less seen one. These aurorae are apparently very short-lived. August of last year a photographer got one in the upper penisula of Michigan.

3 August 2015:
http://apod.nasa.gov/apod/ap150803.html

Christopher K.
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Re: Aurora

Post by Christopher K. » October 11th, 2015, 5:59 pm

On Wednesday the 7th the SWPC stated there was a level 3 geomagnetic storm in progress, a level 3 predicted for the 8th. This may help explain why many good aurora pictures are being posted at Tony Phillip's Spaceweather website.

Aurorae were number seven on Jane Houston Jones' countdown list in the "What's Up for October 2015" video.

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