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Animation of Tuesday's CME 7 Feb 2023


Dave Smith

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I would love to have captured a full animation on Tuesday but (1) I didn't know it was happening (2) the clouds kept interrupting which prevented regular timings, so I did keep taking images at random when the cloud permitted. From those these four do give a view of the event. Rough measurement indicates to me that it was erupting at probably in excess of 100 km per second.
Maths at the bottom.

Sun_Halpha_070223_animation.gif.17ba4168d4eb495b36e9249aff06932c.gif

Size of Earth 4mm
diameter of Earth 12 740 km
Distance on screen CME moved in 33 minutes 70mm
So Speed of CME = 70/4 Earth diameters in 33 mins = (70 X 12740)/(4 x 33 x 60) km/s = 112 km/s
Dave

Edited by Dave Smith
animation not working
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