Definition

Adjective: Being where earthquake waves arrive simultaneously; relating to or connecting points on the Earth's surface that experience the seismic shock of an earthquake at the same instant.

Usage

The term "coseismal" is a technical adjective used primarily in seismology (the study of earthquakes). It describes lines or points on a map that are affected by an earthquake's seismic waves at the same time. These lines are used to understand the earthquake's origin and the propagation of its energy.

Examples

• Scientists drew coseismal lines on the map to connect all locations that felt the tremor simultaneously.
• The coseismal area for the deep earthquake was surprisingly large.
• By analyzing coseismal data, geologists can better estimate the epicenter.

Advanced Usage

• Coseismal line: A line on a map connecting points where the seismic shock was felt at the same time. This is the most common compound term.
  • The pattern of coseismal lines helped pinpoint the fault rupture.

Variants and Related Words

• Coseismic (adjective): This is a more common variant spelling with identical meaning.
  • The coseismic deformation was measured using satellite data.
• Isoseismal (adjective/noun): Refers to a line connecting points of equal earthquake intensity (e.g., shaking strength), not necessarily simultaneous arrival.
• Seismology (noun): The scientific study of earthquakes.

Synonyms

• Co-seismic (variant spelling)
• Synseismic (less common, meaning occurring at the same time as an earthquake)

Antonyms

• Aseismic (adjective): Not associated with, caused by, or experiencing earthquakes.

Adjective

1. being where earthquake waves arrive simultaneously