JAMB - Geography (1993 - No. 1)
On September 23 each year, the earth experiences the?
summer solstice
autumnal equinox
winter solstice
vernal equinox
Explication
An equinox is an astronomical event in which the plane of Earth's equator passes through the center of the Sun, which occurs twice each year, around 20 March and 23 September.