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The drawing was made in 1935 at Colebrook,
New Hampshire by Gerald E Owen. He was a rural mail carrier
(he carried mail by horse and wagon, horse and sleigh, and
then automobile during his time as a mail carrier) and he kept
chickens, pigs, and four or five jersey cows on a small farm
on Bridge Street. He was always interested in birds, geology,
and weather.
He wrote of the display [my
comments in brackets]: "Unusual
Phenomena observed from 10 am until 12 noon on Monday, Mar.
4, 1935. The sun rose before 7 am in a clear cloudless sky.
At about 9:30, a thin haze appeared in the north, gradually
overcastting the sky. [a high cirrus cloud
containing the halo forming ice
crystals] At first the rainbow colors
appeared on either side of the sun, right and left. Then,
above and below, [developing 22
degree halo] and a thin arc of light
similar to the aurora appeared at the northward. This arc
gradually grew to intersect the center of the sun. [colourless parhelic
circle from plates and columns] At
this time the colored circle [22
degree halo] was completely around the sun
intersecting the larger light circle. Then appeared above
the sun circle, a greater colored arc and below the sun circle,
a smaller and very brilliant arc. [Column crystals
form upper and lower tangent arcs becoming,
as the sun climbed, a circumscribed halo] Just
outside the intersections of the circles appeared very brilliant
spectrums [sundogs from
plate crystals] and away at the southwest appeared
and northwest appeared opposite colored arcs.[Rare infralateral
arcs from short column crystals]"
If only all descriptions of halo displays
were so accurate. Compare Mr Owen's drawing with the HaloSim
simulations made for a sun elevation of 36.5º - shortly
before noon at Colebrook. The drawing shows very well the placement
of the arcs and the colours of the parhelia, 22º and circumscribed
halos. The colours of the infralateral arcs (from 90º inclined
crystal faces) are shown more spread than those of the arcs from
60º inclined faces as indeed they are.
Reproduced with permission from Mr Owen's grandson, Rob Owen. ©Rob
Owen.
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