As the summer '09 festival season winds down later this season, a new one will just be starting. The Epicenter Festival, dubbed "So Cal's Rock Explosion," will launch its inaugural event on August 22 at Fairplex in Pomona, CA.

Twelve acts will be performing on multiple stages, including Tool, Linkin Park, Alice In Chains, Wolfmother, Atmosphere, Hollywood Undead, Atreyu, Street Sweeper Social Club, Aesop Rock, Sonny and others TBD. The event will be Linkin Park's only performance in the US this year.