A 2.5-magnitude shock occurred just after midnight on August 25, followed at 05:07 UTC by the strongest, a magnitude 4.5 aftershock that woke many residents in Scientists have known that the difference between seismic shaking in eastern North America versus western North America is due in part to the geologic structure and rock properties that allow seismic waves in the East to travel farther without weakening, but during November 2012, the USGS announced that recent research showed that earthquake shaking in the eastern United States can travel much farther and cause damage over larger areas than previously thought. On August 23, 2011, a magnitude 5.8 earthquake hit the Piedmont region of the Commonwealth of Virginia, United States, at 1:51:04 p.m. EDT. Until the magnitude 5.8 earthquake in 2011, the largest earthquake to occur in Virginia was the 1897 magnitude 5.8 Giles County earthquake. This led researchers at the VTSO to
The quake was felt across more than a dozen U.S. states and in several Canadian provinces, and was felt by more people than any other quake in U.S. history.The earthquake prompted research that revealed that the farthest landslide from the epicenter was 150 miles (240 km), by far the greatest landslide distance recorded from any other earthquake of similar magnitude. felt.
Chapman* (2014). Giles County and Central Virginia seismic risk areas in VirginiaSource: US Geological Survey (USGS), Earthquakes in Virginia and Vicinity 1774 - 2004Virginia and the eastern side of the North American continent are in the middle of a tectonic plate. ... Latest earthquakes in Virginia, USA Earthquake list: past 30 days.
On average eyewitnesses hit the website 90s after the ground start shaking. Scientists plotted the landslide locations that were farthest out and then calculated the area enclosed by those landslides. People in certain areas of Pennsylvania, however, did not feel the earthquake at all despite being relatively close to the epicenter. Tremors from the Virginia earthquake were felt as far south as Although earthquakes in the central and eastern U.S. are substantially less frequent than in the western U.S., they are typically felt over a much broader region. concentrate seismic monitoring stations in these two areas, as shown in Figure 2, which shows earthquakes (circles, scaled to) in and near Virginia from 1774 through 1994.
This earthquake is the third largest in the eastern US in the last 200 years and was felt in twelve states.
The earthquake was the strongest recorded east of the Rocky Mountains since 1944 and the strongest ever recorded in central Virginia’s seismic zone. occur in Virginia (Figure 1b).Virginia has had over 160 earthquakes since 1977 of which 16% were In the theory of plate tectonics, the earth's outermost layer is This is by far the greatest landslide distance recorded from any other earthquake of similar magnitude. world's earthquakes occur at the plate boundaries. Their hit times proved to mimic the seismic wave propagation generated by the earthquake. Previous studies of worldwide earthquakes indicated that landslides occurred no farther than 36 miles (58 km) from the epicenter of a magnitude 5.8 earthquake. The USGS found that the farthest landslide from the 2011 Virginia earthquake was 150 miles (240 km) from the epicenter. Calibrating the distance over which landslides occur may also help us reach back into the geologic record to look for evidence of past major earthquakes from the Virginia seismic zone."
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