During an earthquake, waves are radiated outwards from the focus, in all directions.

Options

A. Seismic plate
B. Tectonic
C. Fault wave
D. Oceanic

Answer

**Step-by-Step Solution:**

1. **Understanding Earthquake Waves**: During an earthquake, seismic waves are generated from the focus, which is the point within the Earth where the earthquake originates. These waves travel outward in all directions.

2. **Types of Seismic Waves**: There are two main types of seismic waves:
- **P-waves (Primary waves)**: These are compressional waves that travel the fastest and can move through solids, liquids, and gases.
- **S-waves (Secondary waves)**: These waves are shear waves that travel slower than P-waves and can only move through solids.

3. **Radiation of Waves**: The seismic waves radiate outward from the focus of the earthquake, meaning they spread out in all directions from that central point. This is similar to how ripples spread out on the surface of a pond when a stone is thrown into it.

4. **Movement of Earth's Plates**: The generation of seismic waves is closely related to the movement of tectonic plates. The Earth's crust is divided into several large and small plates that float on the semi-fluid mantle beneath them. When these plates move, they can cause stress to build up, which is released as an earthquake, creating seismic waves.

5. **Impact of Seismic Waves**: As these waves travel through the Earth, they can cause shaking and damage to structures on the surface. The intensity and duration of the shaking depend on various factors, including the magnitude of the earthquake and the distance from the focus.