The Earth spins at approximately 1,037 miles per hour (1,670 kilometers per hour) at the equator.
Here's a breakdown of how that speed is determined and some important considerations:
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Circumference of the Earth at the Equator: Roughly 24,901 miles (40,075 kilometers).
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Length of a Day: Approximately 24 hours.
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Calculation: To find the speed, you divide the Earth's circumference by the length of a day: 24,901 miles / 24 hours ≈ 1,037 mph.
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Why the speed varies: This speed is only accurate at the equator. As you move towards the poles, the circumference around the Earth decreases, and therefore the speed of rotation decreases as well. At the poles, the rotational speed is practically zero.
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Why don't we feel it?: We don't feel the Earth spinning because we are moving with it. Everything around us, including the atmosphere, is also moving at the same speed, creating a sense of relative rest. The force of gravity also holds us firmly in place.
In summary, while the Earth's rotational speed is constant (one rotation every 24 hours), the linear speed experienced depends on your latitude, with the highest speed at the equator.
