FM Strong Signal Capture and AM Overloading

FM capture is an unusual condition that occurs when traveling in the vicinity of a broadcast tower.
^ If listening to a weak FM station when passing the broadcast tower, a stronger station may interfere without changing the tuning control.
^ When passing the tower, the station may switch back and forth a few times before returning to the station originally tuned.

A localized condition which will not harm the receiver is known as overloading.
^ When several broadcast towers are present (common in metropolitan areas), several stations may overload the receiver resulting in considerable station changing, mixing and distortion.
^ Some overloading may also be noticed on AM, but usually to a lesser degree.