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a seismologist
The seismologist is studying earthquake prediction and disaster prevention.
an earthquake
There was a big earthquake yesterday.
earthquake
Yesterday, a big earthquake occurred.
(obsolete) an earthquake
seismology
He is an expert in seismology.
a large earthquake; typically has a magnitude 7 or greater
A large earthquake occurred yesterday, throwing the entire town into chaos.
Kyūjitai form of 地震学: seismology
cause (source or reason of an event or action)
The cause of his lateness was a train delay.
Earthquake Early Warning
An earthquake early warning was broadcasted on TV.
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