It’s a river rave when the Mothership tour lands on Brown’s Island. Featuring the latest electronic-dance-music sounds of Skrillex, Dillion Francis, What So Not and Milo and Otis, the bass-booming, early-evening festivities surely will wake the spirit of the manmade island’s first settler, Elijah Brown, who acquired the land in 1826. Hopefully he’s fan of block-rocking beats and bangers, because this collection of pummeling party enablers know no subtly — it’s nonstop, full-throttle entertainment from the moment they plug in. The DJ-based soiree is Monday, June 9, beginning at 4 p.m. and is open to 24-hour party people of all ages. Tickets are $49.50-$59.50. brownsisland.com.