Longman Dictionary of Contemporary English homepage

Topic: GEOLOGY

earthquake

 noun
     
earth‧quake [countable]
HEG a sudden shaking of the earth's surface that often causes a lot of damage:
An earthquake measuring 6.1 on the Richter scale struck southern California on June 28.
The city is in an earthquake zone.
Definition of earthquake from the Longman Dictionary of Contemporary English within
the topic GEOLOGY
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rift valley

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