Here's how. While ocean waves are typically generated by wind and are relatively shallow, Tsunamis, often triggered by earthquakes, move the entire depth of the ocean.

An intense marine heat wave has developed off the U.S. West Coast, pushing sea surface temperatures more than 5 degrees Fahrenheit higher than normal.

The ocean waters surrounding the United Kingdom and much of Europe are baking in an unprecedented marine heat wave, which scientists say is being intensified by human-caused climate change.