M 4.7 earthquake near Caribbean Sea (Puerto Rico) — 1978-05-15

Magnitude 4.7 earthquake near Caribbean Sea (66 km NW of Mayagüez, Puerto Rico), depth 33 km, 15:25 Local (1978-05-15 19:25 UTC). Shaking felt by ~404K people. Readings from every reporting agency, affected towns, aftershock sequence.

Caribbean Sea (66 km NW of Mayagüez, Puerto Rico) — 18.728, -67.428