The U.S. Geological Survey says the 5.0 quake was centered 114 miles off the coast of Cabo San Lucas and 6.8 miles deep.
Many businesses were closed for a holiday in Mexico City, which has been rocked by a series of strong earthquakes and aftershocks in recent days. Few people were at work or on the street.
Alfonso Gomez is assistant director of the civil protection service in the state capital of La Paz and says the quake had not been felt in the city. He says there were no immediate reports of any damage in Baja California Sur.