Today's magnitude-6.6 was far enough offshore to cause no damage. But this thrust event likely struck on or just above the Hellenic Arc megathrust zone, which ruptured in AD 365 in a magnitude-8 event that caused widespread destruction and a tsunami, hurling ships 3 km inland.

A 5.5-magnitude earthquake off the coast of the Puerto Rico rattled residents of the island nation awake Saturday morning, many of who were left without power in wake of the massive tremor.

It struck around 7:20 a.m. local time near the city of Ponce and the towns of Guanica and Guayanilla, a region that has already been hard hit by a spate of earthquakes starting in late 2019, according the U.S. Geological Survey.

Several buildings were damaged in the early-morning quake but no injuries or casualties have been reported.

Image: Puerto Rico earthquake

Reports of damage were still trickling in early Saturday morning, with at least one second-story balcony crashing in the southern city of Ponce, city spokeswoman Inés Rivera said. Meanwhile, cracks in homes were reported in Guayanilla.

“Everything shook really hard,” Guayanilla spokesman Danny Hernández said by phone.

Ponce Mayor María Meléndez tweeted images of the damages Saturday morning while also urging people to “avoid going to the city center until we make sure everyone is safe.”

Source: nbc news

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