Thanks Coyote. =)
You can use these commands to call a new disaster:
/c remote.call( "bigmonster", "invasion" )
/c remote.call( "bigmonster", "bigworm" )
/c remote.call( "bigmonster", "frenzy" )
/c remote.call( "bigmonster", "biterzilla" )
/c remote.call( "bigmonster", "volcano" )
/c remote.call( "bigmonster", "days", 7 )
/c remote.call( "bigmonster", "on" )
/c remote.call( "bigmonster", "off" )