KZST is a radio station based and licensed in Santa Rosa , California , with a frequency of 100.1 MHz . Its first broadcast came on April 18 , 1971 ( the 65th anniversary of the Great earthquake ) , making KZST " the first FM station between here ( the San Francisco Bay Area ) and Portland , Oregon . " Founded by Gordon Zlot , KZST remains under the ownership of his company , Redwood Empire Stereocasters . The station plays adult contemporary music , with a family-friendly format aimed at so-called soccer moms who often listen to the radio with their children present . During the holiday season , KZST plays Christmas music . ( late November - Christmas Day ) Brent Farris has broadcast his weekday " Morning Showgram " for more than 25 years , the longest current tenure of any radio host in Sonoma County . Jim Grady , the weekend morning host , held that distinction until March 26 , 2004 , when he was released from news/talk station KSRO after 44 years
Great earthquake
1906 San Francisco earthquake
KZST