Aftershock
They are called aftershocks, or tremors.
Yes, aftershocks can occur after a strong earthquake. These are smaller tremors that can happen in the days, weeks, or even months following the main earthquake. It is important to be prepared for potential aftershocks and take necessary precautions.
The magnitude of the Virginia earthquake that was felt in Greensboro, NC was 5.8. This led to light to moderate shaking in Greensboro and other areas in the Southeastern United States.
Earthquake tremors.
The vibrational tremors sent out from an earthquake are known as seismic waves. These waves travel through the Earth's crust and are responsible for the shaking felt during an earthquake. There are two main types of seismic waves: primary (P-waves) and secondary (S-waves).
Aftershocks
after shock :)
Tremors
No, there is no such thing as "would of" ... the term is would have, as in "I would have felt terror at the earthquake if I'd been there."
An oceanic earthquake works almost similar to any earthquake on land. In an underwater earthquake, the seafloor moves, causing vibrations in the ground and shockwaves. When near land, these tremors can be felt. Depending on the magnitude and the type of plate boundary (convergent, transform or divergent), it can cause tsunamis.
Yes, all the time. Granted, most of them appear slightly on most seismographs, and are hence "known," but these minor tremors cannot be felt.
There are occasional very, very small tremors felt in Ireland from minor earthquakes in Britain and under the Irish Sea. There can be years between ones that can be felt. Ireland is not a risk for serious earthquakes though, as it is not at a dangerous position.