A magnitude 2.2 earthquake hit just southwest of Washington, Pennsylvania early Tuesday morning, the United States Geological Survey said.The earthquake happened around 2:58 a.m., according to the USGS.There have been no reports of damage.A 2.2 earthquake is not strong enough to be felt "except by a very few under especially favorable conditions," according to the Modified Mercalli intensity scale.Related: Why has central Pennsylvania seen a recent increase in earthquakes? Watch the report below.