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CORAL GABLES (CBSMiami) – Mysterious tremors have been plaguing Coral Gables residents repeatedly since the start of February.

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The quakes are strong enough to rattle a cup of coffee but not spill it. Yet, no one seems to have an answer.

“These windows went rattling. The cat ran into the other room,” said Gables resident Matt Meehan. “My first thought was earthquake.”

Meehan said the chandelier was swaying back and forth.

“We’re not on a fault line, so what in the world was it” he wondered.

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Boo Zamek, working at her Coral Gables home, felt the same thing earlier in the day.

“A very low subtle vibration ,” said Zamek.

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Coral Gables police said this isn’t the first time this has happened in the neighborhood.

“It’s happened three times in the past three weeks,” said Coral Gables police spokesperson Kelly Denham.

They sent officers out, but she said, “We can’t figure out what it is.”

“It’s concerning enough to call the police,” she added.

FPL spokesperson Bill Orlove doesn’t think his company has anything to do with.

“We did not have anything happen. It is not an electrical issue,” he said.

There were reports of a sonic boom felt from Florida to South Carolina, but the dates don’t add up with the Coral Gables mystery.

“It wasn’t alarming, it was just strange that’s all,” said Zamek.

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And strange is the way it will remain as there are still no clear answers.