Definition - What does Equatorial Circumference mean?
Equatorial Circumference, also known as earth’s equatorial circumference is the linear distance of the earth around the equator. As per research performed by scientists, the earth's shape is not a perfect sphere; it is just a circular shaped polygon very similar to an uneven shaped potato. Due to this theory, the equatorial circumference of earth is more than its polar circumference.
Petropedia explains Equatorial Circumference
The earth’s equatorial circumference and polar circumference are interrelated to each other. Based on both these circumferences, the rotation of Earth happens on its axis. The approximate circumference of earth's surface at the equator is 24,902 miles or 40,075 km; however, if the circumference is measured from North Pole to South Pole, it is only 24,860 miles or 40,008 km. Thus, the equatorial circumference is greater than the polar circumference and this is why the earth rotates from left to right and not top to bottom on its axis.
Because of such rotation, hydrocarbon formations also tend to move from left to right and spread across the porous sedimentary rocks forming a giant reservoir of hydrocarbons.