Bay Area Improv Scene
The Bay Area Improv Scene is a commonly used name for a loose association of musicians and composers centered in the San Francisco Bay Area who create a style of music that evolved largely from avant-garde jazz and modern classical music, with influences from other areas such as electronic art music, free improvisation, and musique concrète. Other names of this scene tend to use phrases such as "Creative Music" to try to incorporate a wider focus than just the improvisational approach.
This scene is comparable to the New York Downtown Scene (which is most often associated with John Zorn) and historically both scenes date back to the same time period in the early 1960s. A listing of some people who have been associated with the scene can provide a sense of the range of the music: List of Bay Area Improv Scene bands and artists