"Simultaneous exhibitions" refer to events where someone engaged in a specific activity or display is doing it simultaneously in different places at the same time. Full definition
In 2011, Misrach's series Destroy This Memory was installed in its entirety at the San Francisco Museum of Modern Art along with simultaneous exhibitions of his work at the Berkeley Art Museum and Pacific Film Archive and the Oakland Museum of California. (artbook.com)
A prominent voice in Chicago's artist landscape, Smith presented simultaneous exhibitions at the Museum of Contemporary Art Chicago and ThreeWalls in 2012. (hydeparkart.org)
In simultaneous exhibitions in Seattle and Portland, Sondra Perry addresses exploitation, ownership, and the commodification of racialized bodies. (artpractical.com)