 Did you know the most common tsunami-generating events are earthquakes that occur beneath the ocean floor? These account for 80 percent of all tsunamis. Also volcanic eruptions, as we recently experienced on January 15th, with the underwater volcanic eruption that occurred near the island of Tonga, which did travel across the Pacific Ocean and impacted our coast here, and then also underwater landslides. These waves occur without warning when steep, unstable cliffs give way after an earthquake or because of erosion, drought, or severe rain. Underwater landslides produce a tiny fraction of tsunamis. To learn more about Tsunami Preparedness Week and increase your tsunami know-how, go to news.caloes.ca.gov and follow us on all our social media platforms.