The answer is NO, so that is NO number three. Toby Dewhurst explains it well, ie the tsunami goes all the way to the bottom so you can't get underneath it. I used to body surf and you can dive under normal waves, but you cannot go under tsunami.
Submarines are relatively unaffected by weather or tsunamis when submerged in deep open waters. Once a submarine is deep enough the conditions on the surface are not felt. Large enough waves can cause a submarine to be pulled (sucked) up to the surface. This is called broaching, this is not a good thing.
A Cruise ship out at Sea would not even notice a tsunami. A Cruise ship in port would get damaged and destroyed like any other ship in port when a tsunami hits. Tsunami, when they are out in the deep ocean, are not massive waves and walls of water.
Large tsunamis have occurred in the United States and will undoubtedly occur again. The tsunami generated by the 1964 magnitude 9.2 earthquake in the Gulf of Alaska (Prince William Sound) caused damage and loss of life across the Pacific, including Alaska, Hawaii, California, Oregon, and Washington.
Many people are killed by tsunamis when they are hit by floating debris or smashed into buildings or walls. If you are far enough offshore, there is nothing being tossed around that can kill you. Tsunamis can last for a while.
The safest place for a vessel in the event of a tsunami is offshore in deep water. So, if your boat is offshore in deep water, you can easily survive a tsunami, but if you're near shore in shallow water it will probably be catastrophic. More than likely, you wouldn't even notice a tsunami passing in the deep water.
Thus, a safe place during a tsunami is uphill a sufficient distance to be above the maximum reach of the tsunami. Tsunami affect low-lying areas, so if you have a choice and sufficient time, move onto a ridge, rather than staying within a valley.
The pressure of deep-ocean sound waves could be used to stop tsunamis in their tracks, researchers have found, by dissipating their energy across wider areas and reducing the height and speed of these monster waves before they reach land.
An earthquake is a natural tsunami warning. Witnesses have reported that an approaching tsunami is sometimes preceded by a noticeable fall or rise in the water level. If you see the ocean receding unusually rapidly or far it's a good sign that a big wave is on its way. Go to high ground immediately.
Building Collapse: Some Precautions You Must Take
- Secure your sweet home from collapse with these effective measures.
- Check the Foundation.
- Build Earthquake-Proof Constructions.
- Avoid Major Alterations.
- Awareness of the construction area.
In other places tsunamis have been known to surge vertically as high as 100 feet (30 meters). Most tsunamis cause the sea to rise no more than 10 feet (3 meters). The Indian Ocean tsunami caused waves as high as 30 feet (9 meters) in some places, according to news reports.
approximately five minutes to two hours
How often might Hawaii get a monster tsunami? Scientists say that the tsunami that hit Japan in 2011 was a thousand-year event. A monster wave might strike Hawaii about as often. The most destructive tsunami in Hawaii's recent history took place in 1946.
Because shorter buildings are stiffer than taller ones, a three-story apartment house is considered more vulnerable to earthquake damage than a 30-story skyscraper. Skyscrapers everywhere must be reinforced to withstand strong forces from high winds, but in quake zones, there are additional considerations.
Some general rules about structural stability: the lowest the center of gravity, the more difficult it is to make a structure topple over, therefore the more stable is the structure. It is more difficult to make a structure with a wide base topple over so, the wider the base therefore, the more stable the structure.
The Strongest Building Material
Pound for pound, steel is the strongest construction material available (unless you count exotic materials like titanium). It is so much stronger than wood that the two cannot be fairly compared.Concrete: Steel isn't the only material that's good for holding up in natural disasters. In fact, the most secure buildings feature an array of different materials. Concrete is one of them. Concrete is resistant to wind that can be generated from natural disasters such as hurricanes, tornadoes and severe thunderstorms.
Common Mitigation Actions
Acquisition of undeveloped hazard prone lands to ensure no future construction occurs there. Retrofitting of structures and design of new construction, such as elevating a home or building. Protecting critical facilities and infrastructure from future hazard events.Here are some of the methods used to help buildings withstand earthquakes.
- Create a Flexible Foundation. One way to resist ground forces is to “lift” the building's foundation above the earth.
- Counter Forces with Damping.
- Shield Buildings from Vibrations.
- Reinforce the Building's Structure.
Awareness, education, preparedness, and prediction and warning systems can reduce the disruptive impacts of a natural disaster on communities. Mitigation measures such as adoption of zoning, land-use practices, and building codes are needed, however, to prevent or reduce actual damage from hazards.
Be Safe AFTER
- Listen to local alerts and authorities for information on areas to avoid and shelter locations.
- Avoid wading in floodwater, which can contain dangerous debris.
- Be aware of the risk of electrocution.
- Stay away from damaged buildings, roads, and bridges.
- Document property damage with photographs.
Recent Tsunamis. Tsunami of January 22, 2017 (Bougainville, P.N.G.) Tsunami of December 17, 2016 (New Britain, P.N.G.)
IF YOU ARE UNDER A TSUNAMI WARNING:
- First, protect yourself from an Earthquake.
- Get to high ground as far inland as possible.
- Be alert to signs of a tsunami, such as a sudden rise or draining of ocean waters.
- Listen to emergency information and alerts.
- Evacuate: DO NOT wait!
- If you are in a boat, go out to sea.
Aquatic earthquakes are the most common cause, but volcanic activity, landslides and impacts of meteorites may also generate tsunamis. Displacement and damage to infrastructure are also important contributors to the human, social, and economic effects of tsunamis7.
Hold on to any sturdy furniture until the shaking stops. Crawl only if you can reach better cover, but do not go through an area with more debris. When the shaking stops, if there are natural signs or official warnings of a tsunami, then move immediately to a safe place as high and as far inland as possible.
