The quake was centered 59 kilometers (37 miles) north of the resort of Acapulco, according to the U.S. Geological Survey. It caused a minor gas leak that was quickly controlled, and knocked out electricity in some areas.
The quake also scared hundreds of tourists, who fled Acapulco's high-rise hotels. Many spent the rest of the night sleeping by the pool, afraid to return to their rooms.
Sandra Santana said she woke up to rattling windows on the 17th floor of her hotel.
"Everything was vibrating, and we thought it was going to fall, crushing us," she said.
Russia has developed an unmanned submarine capable of carrying a powerful nuclear munition. Two years ago, the Americans could not even think Russia could do it
The head of the Russian Finance Ministry, Anton Siluanov, said that the Americans would suffer additional losses if they impose sanctions on Russia's public debt