Here's how it works:
* Seismograph: This instrument is designed to detect and record ground motion. It consists of a heavy weight suspended from a frame. When the ground shakes, the frame moves with the earth, but the heavy weight remains relatively still due to inertia.
* Seismogram: The relative movement between the weight and the frame is recorded on a piece of paper or digitally, creating a trace called a seismogram.
* Earthquake Patterns: The seismogram shows the amplitude (height of the wave) and frequency (number of waves per unit of time) of the ground motion. These patterns can be used to determine:
* Magnitude: The size of the earthquake.
* Epicenter: The location on the earth's surface directly above the earthquake's origin (focus).
* Type of seismic wave: Earthquakes produce different types of waves (P waves, S waves, surface waves) that travel at different speeds and have different patterns on the seismogram.
So, the seismograph is the instrument that detects and records earthquakes, and the seismogram is the visual representation of the earthquake's activity.
