STEVE Aurora April 10
Taken by Alan Dyer on April 10, 2018 @ near Gleichen, Alberta
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Date Taken: 2018:04:10 10:20:46
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These are 360° panoramas of a classic auroral arc across the north, as part of the main auroral oval, and the unusual and still unexplained isolated arc that has become known as STEVE — Strong Thermal Emission Velocity Enhancement. The Steve arc runs from east to west here and passed overhead from my location in southern Alberta.

These illustrate how the STEVE arc always appears well south of the main auroral oval, and usually when the main aurora is not that active.

Jupiter is the brightest object.

I shot this April 10, 2018 from home in southern Alberta, at about 1:50 am MDT.

The STEVE display was in its dying moments. It was brighter earlier when I shot a time-lapse. And other photographers out this night caught STEVE at its brightest with strong green picket fence rays at about 1 am MDT.

By about 2 am STEVE had faded completely to the eye.

The eye it looked white or colourless. The camera picks up Steve’s characteristic mauve or pink colour, different from other auroras.

This is a stitch of 12 segments, taken with the 14mm Rokinon 14mm SP lens at f/2.5 and Canon 6D MkII at ISO 6400, for 10-seconds each.

The two panoramas are two different projections of the same 12 segments. Stitching was with PTGui.
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