1. Charts. Earthquake epicenters and gravity anomalies in Gulf of Mexico, Caribbean Sea, and adjacent regions; [miscellaneous chart] 7941. Scale 1° long.=o.7 in. Preliminary edition. Bookmark Corporate/Agency Authors: Hydrographic Office, Navigation Bureau, and Navy Department Publisher: Hydrographic Office Date: June, 1932 SuDoc number: N 6.18/2:Ea 7