Rico, the Virgin Islands, and Other Caribbean Islands – United States Geological Survey Caribbean Tsunami and Earthquake Hazards Studies – Woods Hole Coastal and Marine Science Center Latest Significant Earthquakes – Puerto Rico Seismic Network Promare – Promare - Promoting Marine Research and Exploration Geography of Puerto Rico Geology of Puerto Rico Geology of the Caribbean Natural history of the Caribbean Oceanic trenches of the Atlantic Ocean Oceanic trenches of the Caribbean Sea Physical oceanography Subduction zones Seismic faults of North America