Lo­cated just 5 miles north of Gre­nada is an ac­tive un­der­wa­ter vol­cano with an un­usual name: Kick ’em Jenny. It rises more than 4,000 feet from the seafloor; when it erupted in 1939, it sent a shower of wa­ter and de­bris 1,000 feet in the air and caused sev­eral small tsunamis in north­ern Gre­nada and nearby Bar­ba­dos. The vol­cano is on the ship­ping route from St. Vin­cent to Gre­nada, and be­cause of the ac­tiv­ity, there is a mar­itime ex­clu­sion zone of 1.5 kilo­me­ters around Kick ’em Jenny. Be­cause the bub­bles of vol­canic gases can cre­ate a sink­ing hazard by low­er­ing the wa­ter den­sity, this ex­clu­sion zone is in­creased to 5 kilo­me­ters dur­ing pe­ri­ods of high-vol­canic ac­tiv­ity. And the name? No one seems to know for sure.

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