Tsunamis can be caused by several geological events, most commonly:
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Earthquakes: Underwater earthquakes, especially those with a magnitude of 7.0 or greater, can displace large volumes of water, generating powerful tsunami waves.
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Volcanic Eruptions: Volcanic eruptions, particularly those that involve the collapse of a volcanic island or the explosion of an underwater volcano, can displace water and generate tsunamis.
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Landslides: Underwater landslides or landslides that occur near coastlines can also displace water and create tsunamis.
In summary, while earthquakes are the most common cause of tsunamis, volcanic eruptions and landslides can also trigger these massive waves.