Just before midnight on February 29, 1960, an earthquake hit the Moroccan city of Agadir, killing between 12,000 and 15,000 people—roughly a third of the city’s population. As many were injured; at least 35,000 were left homeless. Yto Barrada’s “Agadir,” in The Curve gallery at London’s Barbican Centre, invokes the disaster in oblique and poetic ways across drawings, audio recordings, collage, and film. Despite the breadth of media employed, this is a show that lacks the depth of historical context one might expect from such a weighty subject, compelling viewers to keep reading, watching, and learning after they’ve left the exhibition, in order to fill in the gaps. Entering the dim gallery was exciting. Its dark lighting and dramatic colors—the long curving wall painted black, the carpet beneath it blood red—recalled the set of a camp Italian horror film. (The cinematic influence is in keeping with the artist’s broader practice: in 2006, Barrada founded the Cinémathèque de Tanger, an independent project that, operating from Tangier’s Cinema Rif, is dedicated to the local and international promotion of independent Moroccan film.) On the Barbican’s curving wall are sixteen large drawings, “Untitled (Agadir)” (2018), executed by scratching broad white lines from the black paint. …