A small earthquake centered off the north coast of Cuba shook windows and rattled some residents of the Florida Keys early Sunday, but apparently caused no damage.

"I wasn't even sure it was an earthquake," said Milena Donaldson, who had just arrived for the 7 a.m. start of her at work day at Casa Marina, a Key West resort, when she felt what she described as a slight vibration."I thought I might have imagined it."

The 4.7 magnitude quake, at a depth of 6 miles, occurred at 7:12 a.m. about 17 miles northwest of Corralillo, Cuba, according to Paul Caruso, a geophysicist at the USGS National Earthquake Information Center.

Classified as "light," Sunday's temblor follows a magnitude 5.0 earthquake recorded Jan. 9, 24 miles north of Corralillo, Cuba, or about 112 miles east of Havana. That moderate earthquake, reportedly 12.4 miles below the earth's surface, was felt as far away as Orlando.


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Sunday's quake was the fourth aftershock since the main shock in January. Caruso said the agency received self-reports Sunday from Floridians in Naples, Miami, Fort Lauderdale and even as far north as Orlando.

The Monroe County Sheriff's Office dispatcher recorded several calls from Lower Keys residents wondering what was going on, according to Deputy Becky Herrin.

"No big deal," said Jan Burch, who was helping deal with the busy breakfast rush at The Stuffed Pig, the Marathon restaurant owned by her daughter. "We didn't feel it."

A bigger topic of conversation over breakfast in Marathon was the Original Marathon Seafood Festival, which continued Sunday.

The earthquake didn't mentioned in the pool report from reporters traveling with President Barack Obama and his family, on a weekend stay at the Ocean Reef Club in Key Largo. The White House said Obama would play golf for the second day in a foursome that included former Miami Heat star Alonso Mourning before returning to Washington on Sunday afternoon.

The earthquake did rock parts of Cuba, however. A Twitter user named @adam_koven, who was apparently staying at a hotel in the beach side town of Varadero, tweeted, "What an amazing resort. You ask for a morning wake up call and they move the earth for you."

mwclary@tribune.com