Source: www.theguardian.comImage: “Earthquakes, Mudslides, Fires And Riots – California & Graphic Design 1936 – 1986” edited by Louise Sandhaus. License: All Rights Reserved.
Designed by Margret Larsen, art director at the Joseph Magnin department store in the late 1950s to early ’60s. The illustration is by Betty Brader and depicts Larsen herself. (See a photo that seems the likely source image.)
Geezer’s Gallery dates this ad 1958, as shown by the Art Directors and Artist Club of San Francisco. See more from the campaign (albeit in poor reproductions) on their page.