The epicentre of an earthquake is :

Options

A. deep under the crust of earth
B. in the mantle of earth
C. on the surface of earth
D. in the core of earth

Answer

**Step-by-Step Solution:**

1. **Understanding the Structure of the Earth:**
- The Earth is composed of three main layers: the crust, the mantle, and the core.
- The outermost layer is called the crust, which is where we live and where earthquakes occur.

2. **Defining the Epicenter:**
- The epicenter of an earthquake is defined as the point on the Earth's surface directly above where the earthquake originates, known as the focus or hypocenter.
- The focus is located deep within the Earth, specifically in the crust.

3. **Location of the Epicenter:**
- Since the epicenter is the point on the surface directly above the focus, it is important to note that it is not located in the mantle or core, but rather directly above the focus in the crust.

4. **Conclusion:**
- Therefore, the correct answer to the question "The epicenter of an earthquake is:" is that it is located deep under the crust of the Earth.

**Final Answer:**
The epicenter of an earthquake is deep under the crust of the Earth.

---