Does the coriolis effect occur at the poles or the equator and why?

The actual paths of winds—and of ocean currents, which are pushed by wind—are partly a result of the Coriolis effect. ... The key to the Coriolis effectlies in the Earth's rotation. The Earth rotates faster at the Equator than itdoes at the poles. This is because the Earth is wider at theEquator.

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Geologists use  seismic waves to  locate an earthquake's epicenter..