(CNN) A 6.4 magnitude earthquake that killed one person in Puerto Rico on Tuesday is one of hundreds of tremors that have rattled the island for more than a week. And experts say the shaking is not over yet.

The latest earthquake struck during the predawn hours, flattening homes, knocking out power in some areas and jolting awake terrified residents. Just a day earlier, a magnitude 5.8 quake hit off the island's southwestern coast.

Since December 28, more than 500 earthquakes of magnitude 2 or greater have rattled the area, according to the US Geological Survey. Many of them were relatively shallow, which means they were likely felt on land.

Of the hundreds of earthquakes, 32 were magnitude 4 and above, including the ones Monday and Tuesday.

"Over the past several weeks, hundreds of small earthquakes have occurred in this same region, beginning in earnest with a magnitude 4.7 earthquake late on December 28 and a magnitude 5.0 event a few hours later," the USGS said.

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