STS9 and their fans went deep underground on Saturday for the jamtronica outfit’s first of two scheduled weekend performances at The Caverns in Pelham, TN in celebration of Halloween week. The two shows, billed as STS9 Presents: Red Caverns, act as the latest stops on the band’s run of east coast performances as part of their 2019 Apo11o tour.

Related: STS9 Soars Above The Cosmos At Red Rocks Night One [Photos/Video]

Sound Tribe Sector 9 will return to the underground venue to close their weekend Halloween run on Sunday, which will be their final fall performance until the band regroups for a scheduled appearance at San Diego’s Wonderfront Music & Arts Festival in late November.

STS9 also recently announced their New Year’s plans with a run of five shows at Atlanta, GA’s The Tabernacle leading up to 2020. Head to the band’s website for ticket info.

Scroll down for a full gallery of photos from Saturday’s performance, courtesy of photographer Kendall McCargo.