These are the sounds of a tsunami warning. They alert residents that a killer wave is about to strike. These sirens, however, are just a small part of the sophisticated warning systems that played a role in Japan and in the U.S. during the Pacific Ocean tsunami in March 2011.
Check out our Every Full Moon collection on Tsunami Science and Safety:
https://oceantoday.noaa.gov/everyful...
Original video source:
https://oceantoday.noaa.gov/tsunamist...
Ocean Today is an interactive exhibit that plays short videos on ocean related themes.
Visitors can select from 150+ videos on topics ranging from deep‐sea exploration, marine species, and restoration projects to hurricanes, oceans and human health, and
climate science and research. These videos are a free resource and are available on our website at https://oceantoday.noaa.gov.