The point inside the Earth where an earthquake originates and energy is first released is called the focus or hypocenter.

Here's a breakdown:

* Focus (Hypocenter): This is the exact point beneath the Earth's surface where the rupture begins and energy is first released. It's often located several kilometers below the Earth's surface.

* Epicenter: The point on the Earth's surface directly above the focus. This is where the earthquake's effects are typically strongest.

Think of it like this: the focus is the starting point of the earthquake deep underground, while the epicenter is the point on the surface directly above the focus where the earthquake's energy reaches first.