2011 Virginia earthquake
The USGS found that the farthest landslide from the 2011 Virginia earthquake was from the epicenter. This is by far the greatest landslide distance recorded from any other earthquake of similar magnitude. Previous studies of worldwide earthquakes indicated that landslides occurred no farther than from the epicenter of a magnitude 5.8 earthquake. The study suggested that the added information about East Coast earthquakes may prompt a revision of equations that predict ground shaking. "What makes this new study so unique is that it provides direct observational evidence from the largest earthquake to occur in more than 100 years in the eastern U.S. Now that we know more about the power of East Coast earthquakes, equations that predict ground shaking might need to be revised."
2009–19 Oklahoma earthquake swarms
Early on the morning of September 3, a 5.8-magnitude quake struck 9.3 miles (15 km) north of Pawnee, Oklahoma, breaking the record set by the 2011 earthquake near Prague, Oklahoma for the strongest quake in the state. Though the USGS originally stated that, like the Prague quake, its magnitude was 5.6, the USGS later upgraded the magnitude of the Pawnee quake to 5.8 while simultaneously retrospectively upgrading the Prague quake to 5.7. Just as with its predecessor in 2011, this quake also was reported to have been felt by people in other states; the USGS recorded reports of perceptible shaking as far north as Fargo, North Dakota and as far south as San Antonio, Texas. Multiple residential and commercial structures were damaged, and one person was injured in Pawnee when he was struck by falling bricks.