File:Caught in the Act! (19813129038).jpg

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Eruptive prominence in Hydrogen alpha - sequence caught over 24 minutes.

Thought I saw some rapid changes occurring to a tree-like prominence on the limb so kept on imaging it over about 24 minutes.

It’s thought that some disturbance such as a flare or magnetic reconnection event “activates” a prominence which then erupts. Gravity and or magnetic field lines can pull the plasma back towards the Sun. If it escapes, it becomes a Coronal Mass Ejection which can cause aurorae and geomagnetic storms if Earth directed.

No flares were recorded yesterday that could be observed from Earth or Sun watching satellites.

I was using a lot of new equipment so I had my hands quite full – glad I caught this.

Equinox 120ED scope, Quark Chromosphere, 0.5x FR, Grasshopper 3 camera/Firecapture software Hinode guider

Ioptron ZEQ25GT mount.
Date
Source Caught in the Act!
Author john.purvis
Camera location55° 02′ 53.87″ N, 6° 55′ 43.18″ W Kartographer map based on OpenStreetMap.View this and other nearby images on: OpenStreetMapinfo

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This image was originally posted to Flickr by john.purvis at https://flickr.com/photos/16271433@N02/19813129038 (archive). It was reviewed on 25 September 2018 by FlickreviewR 2 and was confirmed to be licensed under the terms of the cc-by-2.0.

25 September 2018

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current07:55, 25 September 2018Thumbnail for version as of 07:55, 25 September 20183,480 × 2,792 (3.62 MB)PlanetUser (talk | contribs)Transferred from Flickr via #flickr2commons

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