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."
1895 Quchan earthquake
The 1895 Quchan earthquake occurred at about 11:30 local time (08:30 UTC) on 17 January. It had an estimated magnitude of 6.8 on the surface wave magnitude scale and a maximum perceived intensity of VIII ("Severe") on the Mercalli intensity scale. It caused severe damage in Quchan County, particularly to the town of Quchan itself and there were an estimated 1,000–11,000 casualties. It was the last in a sequence of major damaging earthquakes that struck the area between 1851 and 1895.