950 earthquakes have hit Puerto Rico so far this year. Why? Blame it on an ‘earthquake swarm’

[USA TODAY] Story Highlights The worst quake – a magnitude 6.4 that struck early Tuesday – killed at least one person. Tectonics in Puerto Rico are dominated by the convergence between the North America and Caribbean tectonic plates. More earthquakes are possible in Puerto Rico, as is a risk for tsunamis. […]