A 5.8 magnitude quake hit Puerto Rico before dawn Monday, unleashing small landslides, causing power outages and severely cracking some homes. It was one of the strongest quakes yet to hit the U.S.
A burst of seismic activity near the Puerto Rico Trench has renewed attention on tsunami risks along the US East Coast. Over 50 tremors have been recorded since April 1 in the deep Atlantic fault zone ...
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