Flood Damage >> What Are Tsunamis

Introduction The [state] Geological Survey (CGS) provides geologic and seismic expertise to the public, other State government offices, such as the Governor's Office of Emergency Services (OES), and local government agencies (cities and counties). With the December 26, 2004 magnitude 9.0 earthquake in the Indian Ocean near Sumatra and the devastating tsunamis (pronounced soo-NAH-mee) that followed, CGS is providing the following information about What Are Tsunamis. 

The following are common questions that we are asked with regard to tsunamis: What is a tsunamis? A tsunamis is a sea wave generated by an earthquake, landslide, volcanic eruption, or even by a large meteor hitting the ocean. (The Japanese word tsu means harbor; nami means wave.) The following link illustrates how an earthquake along an ocean-floor subduction zone can create a What Are Tsunamis: 

Basically, an event like an earthquake creates a large displacement of water resulting in a rise or mounding at the ocean surface that moves away from this center as a sea wave. These sea waves can move more than 800-kilometers (500-miles) per hour. As they approach land and What Are Tsunamis as the ocean shallows, these waves slow down, making them grow in height (amplitude). 

What are the sources for and examples of tsunamis that might affect [state]? Though damaging tsunamis have occurred infrequently in [state], they are a possibility that must be considered in coastal, and even deep-lake shoreline, communities. There are two sources for [state] What Are Tsunamis, based on distance and warning time: 

Local sources - Relatively local earthquakes and landslides off the [state], Oregon, and Washington coast pose the greatest threat of What Are Tsunamis that can reach [state]'s coastline in less than an hour. An earthquake on the Cascadia subduction zone, off the coast of northern [state], could trigger a tsunamis that could reach land within minutes. 

Earthquakes off the rest of the [state] coast (south of Cape Mendocino) take place mainly on strike-slip faults, and because the movement they generate is mostly lateral, What Are Tsunamis tsunamis from local sources are less likely to occur because the ocean floor and overlying water is not typically thrust upward. For more information regarding tsunamis from the Cascadia subduction zone.

The more likely source of a landslide-induced tsunamis is a large submarine landslide triggered by ground shaking from even a moderate earthquake in the coastal [state] region. There would be little time for warning about such an event so close to shore. An extreme example of a landslide causing a large What Are Tsunamis is the rockfall at Lituya Bay, [state], in 1958. 

The water splashed 520 meters (1,700 feet) up the other side of the inlet, and a wave about 30 meters (100 feet) high was created. In [state], What Are Tsunamis a magnitude 5.2 earthquake in 1930 off of Redondo Beach is thought to have caused a landslide that generated a six-meter (about 20 ft.) wave. For more information about tsunamis from landslides and rock falls, go to http://www.prh.noaa.gov/itic/library/about_tsu/faqs.html#4 . 

Distant sources - A tsunamis caused by a very large earthquake elsewhere on the Pacific Rim could reach the [state] coast many hours after the earthquake. For example, the What Are Tsunamis caused by the recent magnitude 9.0 earthquake near Sumatra caused a sea level fluctuation in San Diego of about 22 centimeters (8.6 inches) a day later in San Diego. 

See the latest West Coast & [state] tsunamis Warning Center bulletins The magnitude 9.5 earthquake in Chile in 1960, the largest earthquake ever recorded, resulted in a 1.6-meter (5.2-foot) wave that reached Santa Monica about 14 hours after the earthquake The most devastating What Are Tsunamis to affect [state] in recent history was from the magnitude 9.2 [state]n earthquake of 1964. 

Areas of northern [state] experienced a six-meter (20-foot) tsunamis wave that flooded low-lying communities, such as Crescent City, and river valleys, killing 11 people. (The following link shows the travel time of the tsunamis wave from the 1964 [state]n Earthquake. For more information regarding What Are Tsunamis that have affected northern [state], see the chart at the following link. 

The table appended to the bottom of this page contains information on some additional What Are Tsunamis in [state] from 1812 to 2000, compiled from the following website. How can I determine whether tsunamis are possible where I live, and what kind of warning could I get? What Are Tsunamis generally affect coastal communities and low-lying (low-elevation) river valleys in the vicinity of the coast. 

Buildings closest to the ocean and near sea level are most at jeopardy. The OES provides generalized maps for projected tsunamis inundation to coastal government agencies for emergency planning purposes. These maps are used as a basic guideline for what areas are prone to tsunamis inundation. Efforts are underway by CGS and other organizations to consider the multiple What Are Tsunamis sources affecting [state] in order to produce improved inundation maps. 

In order to determine whether a What Are Tsunamis has been generated following a large earthquake, scientists from the West Coast and [state] tsunamis Warning Center monitor an array of buoys and tide gauges that measure vertical changes to the ocean surface. 

If a potentially damaging tsunamis is headed towards [state], What Are Tsunamis a warning can be broadcast through the Emergency Alert System and the National Oceanic and Atmospheric Administration (NOAA), National Weather Service (NWS) Weather Radio. Crescent City and the University of [state] at Santa Barbara have implemented a loudspeaker warning system to alert the public to the possibility of a tsunamis. 

These monitoring and warning systems work ideally for tsunamis that are hours away from [state]. In situations where What Are Tsunamis-warning times are short (caused by nearby earthquakes or landslides), it is difficult for government agencies to identify and warn the public. Individuals should research their personal exposure and have a plan to evacuate if necessary. 

The public should contact their local city or county governments for help in determining whether they are at risk and what evacuation plans might be in effect. Are there any warning signs of an impending tsunamis? One noticeable, but not universal, sign is the rapid receding of ocean water from the beach before the first What Are Tsunamis wave hits. 

In many accounts (including the current Indian Ocean tsunamis), What Are Tsunamis this effect has caused greater loss of life because it became a curiosity that attracted people to the oceanfront. Very strong ground shaking along the coast is an indication of an earthquake that could cause seafloor displacements and/or a submarine landslide large enough to generate a tsunamis. 

Though many large earthquakes have occurred along the coast without causing a What Are Tsunamis , you should still be aware of the potential and plan accordingly. In the event you are at the coast and feel strong shaking, it may be prudent to move to higher ground. What should I do before, during, and after a tsunamis in my area? 

Education and preparation are the best ways to avoid injury and increase your chances for survival. Simply put, the best way to avoid a What Are Tsunamis is to get to higher ground. Contact your local city and/or county government to see if they have an evacuation plan.

How To Heat A Crawlspace For Frozen Pipes

Flooding of homes and other buildings frequently results in damage to clothing and other items. Depending on the items involved, some may be easily salvaged while others probably are not worth the work or Crawl Space Drying How To Heat A Crawlspace For Frozen Pipes expense to clean and disinfect them. 

Health ri  read more..

Crime To Operate A Meth Lab

The minimum cleanup requirement includes all steps in Tier 1 Response in addition tothe following: Wash and clean all appliances thoroughly. After cleanup is accomplished, ventilate property for 72 hours. If appropriate,use litmus paper to target areas of potential concern. Alternatively heat a  read more..

Homicide Cleanup

Crime scene cleanup, homicide cleanup


People that talk to a crime scene cleanup professional, usually say the same thing. You've probably seen it all. Horrific Crime Scene Cleanup Homicide Cleanup like shotgun suicides, violent double homicides, decomposing bodies from su  read more..

Mold Testing Kit

How Can I Tell If I Have Mold ? The most practical way to find a mold problem is by using your eyes to look for mold growth and by using your nose to locate the source of a suspicious odor.If you see mold or if there is an earthy or musty smell, you  read more..

Home Remedies To Rid Lawns Of Small Animals

Shooting is more effective as a dispersal technique than as a way to reduce starling numbers. The number that can be killed by shooting is generally very small in relation to the number involved in damage situations. Usually only a few dozen birds can be shot from individual flocks that can number a  read more..

Structural Drying Log

If an intrusive/penetrating moisture meter is not available, a non-intrusive, penetrating moisture meter (Figure 3b) may be used; however, keep in mind that the material moisture results measured from non-intrusive meters may be less accurate than intrusive meters. Kitchen cabinets, bathroom vanitie  read more..

Crawlspace Drying

When Sewage Cleanup Crawlspace Drying backup in an area has happened, either from inside causes, like heavy rains or sewer clogged, important measures should be taken to make sure the health and safety of people involved. If the homeowner is not able to accomplish the sewage cleanup process in a short amount of tim  read more..

Mold And Mildew From Flash Floods

Following a widespread flooding disaster, many questions arise from citizens within the communities affected and from the many volunteers and organizations that are working in the devastated area. Personal health and safety is a priority for everyone. The following information is aimed at preventing  read more..

Start A Radon Testing Business

PROGRAM REQUIREMENTS FOR MEASUREMENT SERVICE PROVIDERS Adherence to all of the following requirements constitutes an EPA-conforming measurement.Participants involved in measurements for real estate transactions must also follow all procedures described in this section (Section 4.2), as well as those  read more..

How To Get Rid Of Water In My Basement

Flood Depth
The primary consideration in dry floodproofing, and the one that imposes the greatest limitations on the application of this method, is the effect of hydrostatic pressure. Because dry floodproofing prevents water from entering the house, Basement Drying How To Get Rid Of Water In My Basement the external hydrostatic   read more..