The point on Earth's surface directly above the focus of an earthquake.

The point on Earth's surface directly above the focus of an earthquake.

• A. Fracture Zone
• B. Epicenter
• C. Abyssal Hill
• D. Continental Margin

Answer: (B)

The main idea is the surface point directly above where an earthquake starts inside the Earth. That starting location is the focus (also called the hypocenter), and the point on the surface directly above it is the epicenter. Seismic waves radiate from the focus and reach the epicenter first on the surface, which is why shaking is often described relative to the epicenter. The other terms refer to features or boundaries on the ocean floor or continents (a fracture zone, abyssal hill, continental margin), not the specific surface point above the quake’s origin.

The main idea is the surface point directly above where an earthquake starts inside the Earth. That starting location is the focus (also called the hypocenter), and the point on the surface directly above it is the epicenter. Seismic waves radiate from the focus and reach the epicenter first on the surface, which is why shaking is often described relative to the epicenter. The other terms refer to features or boundaries on the ocean floor or continents (a fracture zone, abyssal hill, continental margin), not the specific surface point above the quake’s origin.