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  • Good question! When an underwater volcano, it creates an earthquake, specifically a megathrust earthquake, which causes tsunamis. In the Ring of Fire, on the Pacific Plate Rim, there are 90% of earth's earthquakes!
  • When you go to the beach, you may not think of all that's happening. But so much lies beneath the ocean's surface.
  • Underwater, there are earthquakes, volcanoes, and even deep trenches!
  • What happens when the volcanoes erupt?
  • Look at the shoreline! Some of the sand is going back into the ocean!
  • Exactly! When the tide comes in, some of the sand and rock on the shore is weathered or eroded. This is also why mountains become more rounded over time.
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