Where is transequatorial propagation (TEP) most likely to occur?

Transequatorial Propagation (TEP) is an ionospheric propagation mode that allows signals to travel across the geomagnetic equator. The F-layer of the ionosphere has its highest electron density in two parallel bands located about 15 degrees north and south of the geomagnetic equator, known as the equatorial anomaly. For a signal to properly reflect or refract off these two specific high-density bands, the path of the radio wave must cross the equator at roughly a right angle. Therefore, TEP is most likely to occur between stations located in opposite hemispheres, separated by 2,000 to 3,000 miles, over a path that is perpendicular to the geomagnetic equator.