Definition

Noun: - A graphical record of ground motion: A seismogram is the visual trace or chart produced by a seismograph, showing the movement of the ground (such as from an earthquake or explosion) over time.

Usage

• A seismogram is the primary data output of a seismograph. Scientists analyze seismograms to determine an earthquake's location, magnitude, and other characteristics.
• The term is used specifically in the fields of seismology, geology, and geophysics.

Examples

• The scientist examined the seismogram to pinpoint the earthquake's epicenter.
• A complex seismogram with large amplitude waves usually indicates a major seismic event.
• By comparing seismograms from different stations, researchers can track how seismic waves travel through the Earth.

Advanced Usage

• Digital seismogram: In modern seismology, the graphical record is often a digital file rather than a physical paper chart.
  • The laboratory's servers store thousands of digital seismograms for research.
• Interpreting a seismogram: Refers to the expert analysis of the wave patterns (P-waves, S-waves, surface waves) shown on the record.
  • The key to accurate magnitude calculation lies in correctly interpreting the seismogram.

Variants and Related Words

• Seismograph (noun): The instrument that detects and records ground motion to produce a seismogram.
  • The observatory houses a very sensitive seismograph.
• Seismology (noun): The scientific study of earthquakes and the propagation of elastic waves through the Earth.
  • He pursued a career in seismology.
• Seismometer (noun): The internal sensor component of a seismograph that detects the ground motion.

Synonyms

• Seismic record: A direct synonym emphasizing it is a recording of seismic activity.
• Seismograph record: A more descriptive term specifying it is the record from a seismograph.

Related Phrases/Idioms

(This word is a technical/scientific term and is not commonly used in idiomatic expressions or phrasal verbs.)

Noun

1. the graphical record of an earth tremor made by using a seismograph