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.
The discovery of the submarine has unveiled a few "inconsistencies." For example, how can one explain the fact that the sub was found where it needed to be searched for from the start?
This problem is not limited to the situation with the "whale prison" in Russia's Far East, because many people buy tickets to go to oceanariums and turn a blind eye to the problem