Recent seismic activity in the Gulf and in northern Louisiana have prompted concerns about the potential for tsunamis along the Gulf Coast. It's happened before.
In the wake of highly destructive earthquakes that have left tens of thousands dead or injured, soccer fans threw scarves, toys, and more onto the field for children affected.
A magnitude 5.9 quake has shaken Puerto Rico, causing further damage along the island’s southern coast, where previous recent quakes have toppled homes and schools.