The risk of tsunamis in Southern areas is higher than originally thought , partly due to an increase in earthquakes in the region , which are often the cause of tsunamis . Additionally , the author notes that since the ocean 's depth is normally shallow near coastlines , the tsunamis will grow as they approach inland , and areas with heavily populated coastlines , such as those in coastal California , are therefore most at risk .
The risk of tsunamis in Southern California is higher than originally thought, partly due to an increase in earthquakes in the region, which are often the cause of tsunamis. Additionally, the report notes that since the water's depth is normally shallow near coastlines, the tsunamis can grow as they approach land, and areas with heavily populated coastlines, such as those in Southern California, are therefore most at risk.