# How Far Inland Would A 300 Foot Tsunami Go On The East Coast?

TSUNAMI EAST COAST TERRAIN MAPS SHOWN BELOW

Awhile ago I wrote an article titled “300 Foot Tsunami And East Coast Destruction” regarding the possibility of ‘La Palma’ or ‘El Hierro’ of the Canary Islands partially collapsing into the Eastern Atlantic following a major volcanic eruption there.

This event would likely lead to a mega tsunami that travels across the Atlantic and devastates the East Coast of the United States.

Opinions vary regarding the height of the tsunami and range from 60 feet, to 300 feet, and even higher than that as it rolls up the shoreline of the East Coast of the United States and elsewhere.

## How Far Will The Tsunami Go Inland?

“IF” a 300 foot tsunami reached the East Coast, how far inland would it go?

Logically one might reason that the tsunami will travel inland until the elevation of the land is higher than the tsunami. While that sounds logical, there are variables…

Actually, the distance a tsunami will travel inland has more to do with the energy remaining as it hits the shore.

A tsunami will speed across the ocean at hundreds of miles an hour but at a relatively small height (because the ocean is DEEP).

It’s speed decreases as it approaches the shoreline (because the ground beneath it is getting shallower) but it’s energy begins to transfer to its monstrous HEIGHT.

When the speed of the wave approaches zero, the wave breaks, much of its energy is released, and it will not go too much further. A tsunami that reaches a height of 300 feet when it rears up at the shore, will lose energy as it travels inland.

It’s all about energy. Frequency (depending on the source of the tsunami) and Amplitude (shape of ocean floor, shoreline and up-slope factors).

It is conceivable that a given tsunami may rear up quickly (and very high) once it reaches the shore (depending on the shape of the ocean floor leading to the shore), and then ‘break’ and lose much of it’s energy in a relatively short distance. While another tsunami may be more compressed (in frequency) and be thrust forward very quickly while traveling a long distance inland (remember Japan?).

There are scientifically sound reasons for concern that at some point in time a mega tsunami could engulf the entire East Coast with a wave approximating 300 feet in height and sweep everything and everybody inland. The consequences of such an event are nearly unimaginable.

## Tsunami Maps (East Coast Terrain)

Out of curiosity and an interest in maps, I have custom built the following elevation maps based on high resolution data from USGS digital elevation maps of the United States, particularly the East Coast. I have modeled several layers of elevation of the East Coast to illustrate various height scenarios of tsunami versus geography as it travels inland.

Having said that, there are many variables and factors affecting how far a tsunami would travel inland. So if you live 20 miles inland along the Florida coast (for example) at an elevation of 50 feet doesn’t necessarily mean that a 300 foot tsunami (at the shore) will have enough remaining energy to travel all the way to your location.

There are some instances whereby such a tsunami would probably only travel several miles inland while there are other scenarios where it may roar up a river way or bay and devastate far inland.

Regardless of the factors, I felt that you may be curious to see following elevation graphics that I layered together which increment 75 feet all the way to 300 feet in height along the U.S. East Coast. I would guesstimate that if you live within 20 miles of the coast, you may be vulnerable to a Canary Island ‘event’. However this is simply my own estimation.

### Which Cities Might Be Devastated?

Several observations regarding a 300 foot tsunami would be the probable devastation of the following major East Coast cities…

CITY, (Current elevation above sea level, feet)

Portland, ME (~ 50′)
Boston, MA (~ 30′)
New Haven, CT (~ 50′)
Bridgeport, CT (~ 40′)
New York City, NY (~ 20′)
Jersey City, NJ (~ 30′)
Newark, NJ (~ 50′)
Atlantic City, NJ (~ 10′)
Wilmington, DE (~ 80′)
Virginia Beach, VA (~ 10′)
Wilmington, NC (~ 20′)
Myrtle Beach, SC (~ 20′)
Charleston, SC (~ 10′)
Savannah, GA (~ 10′)
Daytona Beach, FL (less than 10′)
West Palm Beach, FL (less than 10′)
Fort Lauderdale, FL (less than 10′)
Miami, FL (less than 10′)

There are countless cities and towns in between these coastal cities. The Eastern Seaboard of the United States includes some of the largest metropolitan areas in the country. Over one third of the country (more than 100 million people) live along the East Coast. Evacuation would be virtually impossible for most (except for the astute who act quickly) due to only hours notice, probable doubt, and the subsequent immediate gridlock that would follow.

The maps below simply show elevation (not the expected distance a 300 foot tsunami would actually travel). With that said, the maps provide visualization and reference.

NOTE: An evacuation plan should include: Road Atlas Map For Each State

Maine, New Hampshire, Massachusetts, Connecticut, New York Coastal Elevation Map

Chesapeake Bay & North Carolina Coastal Elevation Map

North and South Carolina Coastal Elevation Map

Georgia Coastal Elevation Map

Florida Coastal Elevation Map

As is obvious, Florida in particular would be wiped out for many many miles inland from its coast.

Reviewer says, “Probably the best book on the topic ever written” :
Full-Rip 9.0: The Next Big Earthquake in the Pacific Northwest

5-star movie (aftermath of the 2004 Indian Ocean tsunami)
A tourist family caught in the destruction:
The Impossible

13 (today) 479 (week) 2695 (month)

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