Earthquake

Definition

Earthquake is a noun that refers to a sudden and violent shaking of the ground, often caused by movements within the Earth's crust or volcanic activity. Earthquakes can vary in magnitude and can cause significant damage to structures and landscapes.

Parts of Speech

• Noun

Pronunciation

American English

• IPA Pronunciation: /ˈɜrθˌkweɪk/
• Respelling: URTH-kwayk

British English

• IPA Pronunciation: /ˈɜːθˌkweɪk/
• Respelling: URTH-kwayk

Etymology

The word "earthquake" originates from Middle English, formed by combining "earth" with "quake," meaning "to shake or tremble." "Earth" comes from the Old English "eorþe," and "quake" comes from Old English "cwacian," meaning "to shake or tremble."

Derivatives

• Earthquake-prone (adjective)
• Earthquake-resistant (adjective)
• Aftershock (noun - related)
• Seismic (adjective - related)
• Seismology (noun)

Synonyms

• Tremor
• Seism
• Quake

Antonyms

• Stability
• Calm
• Stillness

Usage

The term "earthquake" is commonly used in scientific, geographical, and emergency contexts to describe the natural phenomenon of ground shaking. For example, "The region experienced a 6.5 magnitude earthquake yesterday."

Related Terms

• Seismology: The scientific study of earthquakes and seismic waves.
• Aftershock: A smaller earthquake following the main shock of a larger earthquake.
• Epicenter: The point on the Earth's surface directly above the earthquake’s origin.

Detailed Definitions

Noun

• A sudden and violent shaking of the ground caused by movements within the Earth’s crust: Refers to seismic activity that occurs due to tectonic forces or volcanic action.
  • Example: "The earthquake caused widespread damage across the city."
• A significant geological event marked by ground shaking and potential aftershocks: Refers to the main event as well as any subsequent smaller tremors.
  • Example: "After the main earthquake, several aftershocks were recorded."