Kick'em Jenny

Kick ‘em Jenny is the name of an active underwater volcano on the floor of the Caribbean Sea, about 8 km north of Grenada. Between 1939, the volcano’s first recorded eruption, and 2001, its last, it is said that there were 12 further eruptions. Today, there is a 5-km safety zone around the volcano to deter adventurous snorkelers and scuba divers.

From "Environmental Graffiti"