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S.T.E.V.E. and Picket Fence.

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S.T.E.V.E. and Picket Fence
STEVE = Strong Thermal Emission Velocity Enhancement

STEVE is caused by a wide (25km) Ribbon of hot (3,000ºC) gases 450km high in the sky moving at speeds of 6km/sec. Compare this to the 10m/sec just outside the Ribbon. This particular evening, the Ribbon stretched right overhead across the sky West-East.

STEVE often is associated with strong Auroral displays; but another phenomenon can often also be seen with STEVE, green Picket Fence Aurora displays.

I have only witnessed STEVE thrice, and count myself very lucky.

S.T.E.V.E. and Picket Fence
STEVE with Picket Fence

Horseshoe Bay, B.C.

S.T.E.V.E. and Picket Fence
STEVE with Picket Fence

Pitt Meadows, B.C.

S.T.E.V.E. and Picket Fence

Pitt Meadows, B.C.

S.T.E.V.E. and Picket Fence

At Whistler, B.C.