The coast is clear, meaning that there is nothing in the speakers way to put them in danger.
The duration of Space Ghost Coast to Coast is -1800.0 seconds.
Space Ghost Coast to Coast was created on 1994-04-15.
Space Ghost Coast to Coast ended on 2004-04-12.
By saying "all" that would probably make the answer a no. Ghosts may or may not be real, but to suppose that every sighting of a ghost is a ghost should be wrong.
The Ghost Coast - 1919 was released on: USA: 3 August 1919
Space Ghost Coast to Coast - 1994 Warren - 5.5 was released on: USA: 4 September 1998
Space Ghost Coast to Coast - 1994 Joshua - 4.25 was released on: USA: 1 January 1998
Space Ghost Coast to Coast - 1994 Snatch - 6.2 was released on: USA: 15 October 1999
Space Ghost Coast to Coast - 1994 BooBooKitty - 4.12 was released on: USA: 3 October 1997
Space Ghost Coast to Coast - 1994 Sleeper 2-7 was released on: USA: 28 July 1995
Space Ghost Coast to Coast - 1994 Toast 5-2 was released on: USA: 14 August 1998
Space Ghost Coast to Coast - 1994 Transcript 3-4 was released on: USA: 23 February 1996