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Miscel-

laneous
 

The Day and Night Terminator Across the Earth


Map (c) Apple Computers, Inc.

The maps below are showing the solar terminator at equidistant intervals of 1 hour.
Using the equirectangular projection map the distortion (both shape and area) increases towards the poles.

(1) Lines of simultaneous sunrise at summer solstice (June 21, declination +23.4)
and simultaneous sunset at winter solstice (December 22,
declination -23.4
):

simultaneous sunrise




(2) Lines of simultaneous sunset at winter solstice (December 22, declination -23.4),
and simultaneous sunrise at summer solstice (June 21,
declination +23.4):

simultaneous sunset



(3) Lines of simultaneous sunrise and sunset at equinox
(March 21, September 23,
declination 0):

simultaneous sunrise sunset


More: maps showing the lines of equal solar altitude

(c) 2006-2023 J. Giesen

Last update: 2023, Oct 07