TCB - Wikipedia has the following on the Krakatoa West of Java controversy:
"Krakatoa is, in fact, west of Java (Mount Tambora, on Sumbawa, is the violent volcano east of Java). The film was retitled Volcano in later releases. While the film was in production, its makers became aware of the geographic error in its title but used it anyway, apparently believing that this was a more exotic title than "Krakatoa, West of Java"."