What happens if a cyclone crosses the equator?

Answer 1

This is impossible. A cyclone cannot cross the equator. The reason why this cannot happen is because the Coriolis Force reduces to almost nothing at the equator. The effect on a cyclone would be to cause it to dissipate.

Answer 2

Cyclones do not cross the equator as the Coriolis force that helps form cyclones only works in one hemisphere. However, if a cyclone manages to cross the equator, it would weaken and dissipate due to the lack of Coriolis force in the opposite hemisphere.