Do you ever remember, possibly as a child, scanning the AM radio dial at night and discovering stations from all over the country?  Maybe you listened to a Chicago Cubs game from Wrigley Field on WGN or possibly you tuned in to WSM in Nashville to hear the Grand Ole Opry.  So, why does an AM radio signal travel so far at night?  Because once the sun goes down, AM radio waves are able to bounce off the ionosphere.  You say, "What?"  Just trust me on this one.  At night, a radio station's signal can bounce back and forth from the ground to the ionosphere and just keep traveling around the curvature of the earth.  Since a powerful AM signal travels so much farther at night, that's why Brad Swanson, Program Director of TWR-Bonaire says, "We broadcast at night."

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(Photo of Andy Napier with Brad Swanson in "Sub-1" at the TWR-Bonaire studios)