Earthquakes in Uruguay are extremely rare. This is because the country is far from plate boundaries and doesnt have many fault lines (cracks in the earth that produce mountains with earthquakes) or any active ones basically. Although Uruguay's seismic risk (earthquake risk) is very, very, very low compared to almost every other place on earth, there was an event measuring 5.5 on the Richter Scale on June 5th 1888. It was epicentred under the Rio de la Plata which is roughly 15 kilometres southwest of Colonia del Sacramento, Uruguay and 42 kilometres east of Buenos Aires, Argentina. So yes, Uruguay does experience earthquakes but by far not very often. Not one country on earth is exactly free from earthquakes.