What are the natural warning signs for a tsunami? | American ...
Abnormal ocean activity, a wall of water, and an approaching tsunami create a loud "roaring" sound similar to that of a train or jet aircraft. If you experience any of these phenomena, don't wait for official evacuation orders.
Tsunamis: Know the Signs, Hear the Stories, and Get Prepared!
2021年12月2日 · What do I do when an alarm sounds or I see signs of a possible tsunami? If you are in a hazard zone and you feel a long, strong earthquake (one that lasts for 20 seconds or more) and/or receive a tsunami warning, it is important to: Remain Calm. If there is an earthquake, drop, cover, and hold on during the earthquake.
Tsunami Awareness | Ocean Today - National Oceanic and ...
For your safety, know the potential warning signs of an incoming tsunami: a strong earthquake that causes difficulty standing; a rapid rise or fall of the water along the coast; a loud ocean roar.
Tsunami | Warning Signs along the shoreline and in the deep …
Fortunately, a few natural warning signs can help you understand that a tsunami is approaching and they can be easily recognized. They include: Unusual sea-level fluctuations: a noticeable rapid rise or fall in coastal waters is a sign that there may be a tsunami approaching.
Understanding Tsunami Alerts - National Weather Service
There are four levels of tsunami alerts: warning, advisory, watch and information statement: Tsunami Warning: Take Action— Danger! A tsunami that may cause widespread flooding is expected or occurring.
Tsunamis - Ready.gov
2024年3月21日 · Learn the signs of a potential tsunami, such as an earthquake, a loud roar from the ocean, or unusual ocean behavior, such as a sudden rise or wall of water or sudden draining of water showing the ocean floor.
Tsunami Facts: How They Form, Warning Signs, and Safety Tips
2007年4月2日 · National Geographic News looks at how the killer waves are caused, what the warning signs are, and how to respond when a tsunami threatens. A tsunami is a series of great sea waves caused...