2. What do you mean by
an earthquake?​

An earthquake is an intense shaking of Earth's surface. The shaking is caused by movements in Earth's outermost layer.

An earthquake is the result of a sudden release of stored energy in the Earth's crust that creates seismic waves. ... In its most generic sense, the word earthquake is used to describe any seismic event—whether a natural phenomenon or an event caused by humans—that generates seismic waves

the thirteen colonies are:

connecticut, delaware, georgia, maryland, massachusetts, new jersey, new york, new hampshire, north carolina, pennsylvania, rhode island, south carolina, virginia