Occasional large ones have also occurred, however, the USGS said. Virginia has three seismic zones, or places where earthquakes occur, and one is in the central part of the state, where Tuesday ...

That quake occurred in the Central Virginia Seismic Zone. In part because seismic waves can travel further in East Coast sediment than along the much more seismically-active West Coast ...

Tina Dura (at far left) and her research team use geologic methods to reconstruct the seismic history of the coastal region in the Cascadia Subduction Zone. Disclaimer: AAAS and EurekAlert!