When the Earth Trembled (1913) is an American silent disaster film starring Ethel Clayton and Harry Myers. The film, a short feature, may be the first fiction film to depict the 1906 San Francisco earthquake.

Harry C. Myers was an American film actor and director, sometimes credited as Henry Myers. He performed in many short comedy films with his wife Rosemary Theby. Myers appeared in 330 films between 1908 and 1939, and directed more than 50 films between 1913 and 1917.