Photos: Aftershock Rock Festival Reverberates Through Sacramento Andrew Nixon Saturday, October 12, 2019 | Sacramento, CA More than 90,000 people are gathering over three days in Discovery Park for the Aftershock Music Festival, the West Coast's largest hard rock music festival. Aftershock started in 2012, when 11,000 people showed up to the one-day event. This year's headliners include Slipknot, Tool, and Blink-182. Halestorm crowd.Andrew Nixon / CapRadio Slipknot.Andrew Nixon / CapRadio Dropkick Murphys.Andrew Nixon / CapRadio Crowdsurfing during Lamb of God.Andrew Nixon / CapRadio Lamb of God.Andrew Nixon / CapRadio Halestorm.Andrew Nixon / CapRadio I Prevail performs at Aftershock.Andrew Nixon / CapRadio Phillip H. Anselmo and the Illegals energize the crowd.Andrew Nixon / CapRadio Staind.Andrew Nixon / CapRadio Follow us for more stories like this CapRadio provides a trusted source of news because of you. As a nonprofit organization, donations from people like you sustain the journalism that allows us to discover stories that are important to our audience. If you believe in what we do and support our mission, please donate today. Donate Today