Which Part of South America is Most Likely to Experience Earthquakes Volcanoes and Tsunamis

Which Part of South America is Most Likely to Experience Earthquakes Volcanoes and Tsunamis

Volcanos and tsunamis are natural disasters that most probably generated by earthquakes and south America is considered the most effected region recorded in the past. South America has suffered many earthquakes throughout the history and witnessed huge loss in terms of economy, man force and resources etc.

In the recent years, the western and the northern part of the south America has witnessed some tremendous earthquakes across the continent through which the economy of the state has drastically move downwards and caused huge damage of billions of dollars.

The agency of USGS that take accountability of seismic activity of the continent stated their proposal that in order to overcome the damages from the past and upcoming in the future can be compensate and prevented by making discussion’s that should be based on proper knowledge and research that where the earthquakes can occur in future and how often they might be occur and how strong their magnitude would be.

Which Part of South America is Most Likely to Experience Earthquakes Volcanoes and Tsunamis

Part of South America Likely to Experience Earthquakes Volcanoes and Tsunamis: USGS research

In order to determine that which part of south America is most likely to experience earthquakes, volcanos, and tsunamis the agency USGS has conducted thoroughly research in collaborating with the management of the south America continent and succeeded in developing the models and strategies to enhance the efficiency of emergency planning effort of nationwide.

While if we have a look on the local research studies that had been conducted on the basis of damages caused by earthquakes then the study based on five methodology principles which are follows as:

  • The newest updated catalog of USGS [1].
  • Record of the USGS over the past 30 years in collaboration with the local scientists/researchers of the south America continent and new models with mapped faults.
  • The latest USGS ground seismic motion models that have applied in the hazard maps.
  • USGS PAGER susceptibility models (“PAGER” full abbreviation is the Prompt Assessment of Global Earthquakes for Response, and it is a system that provides mortality and economic loss that possess estimates following significant earthquakes worldwide)
  • All the applied methods in the U.S. building codes.

The local study research of the south America continent is hardly evaluated and uniformed about the earthquakes that caused shaking hazards and risk, but it is the first report through which the management have succeeded in standardizing applicable methodologies and models to take over the risks and hazards.

It is because of the report that the management is able to reduce the inconsistencies throughout the continent, and to target the regions that are in sake of high hazard and risk within the continent.

you can Also Read About which is the best explanation for how earthquakes cause tsunamis


It has been concluded from the research that over 160 million people (or can be said that the third of the total population of South America) live in the areas that effected with considerably higher seismic hazards, principally inside the northern and western portions of the continent.

These are the sites where earthquakes caused shaking of grounds resulting tsunamis are termed as most common areas.it does not mean that only the coastal areas are at risk of hazard. Countries such as Venezuela, Colombia, Ecuador, and Peru could also face high hazard and risk

Chile also faces high hazard, but the vulnerability of buildings is much lower compared with the northern countries due to modern and stringent building codes.

Hence it is dictated from the research that the areas of northern and western part of south America where the seismic activities are not in favorable range is at stake of experience earthquakes, volcanos, and tsunamis.






Which is the Best Explanation for How Earthquakes Cause Tsunamis

Which is the Best Explanation for How Earthquakes Cause Tsunamis?

Basically, Tsunamis are disasters from nature. These are generated by the ocean waves and their magnitude does not remain the same it varies. There are many factors that can trigger a tsunami, but the most important factor is earthquakes, and it is proven scientifically that large earthquakes cause tsunamis.

Before we go to the main topic let me tell you that what is an earthquake?

This can be defined as the movement of the earth’s crust. Simply the shaking of the ground is an earthquake, it caused by nature i-e volcanic activity, landslides, or by human activities i-e coalmine blasts, and atomic experiments

When the shaking of ground occurs due to an earthquake beneath the sea then suddenly the sea slabs move past each other it causes the overlying water to move fast and creating waves

These resulting waves move away from the earthquake and become tsunamis.

How earthquakes cause tsunamis? – Effect of Minor and large earthquake

An earthquake may be minor or large depending upon its magnitude and this magnitude is very important in triggering tsunamis.

Minor earthquakes that are in a range of magnitude below 6.5 are implausible to generate a tsunami but there are following magnitudes that can cause fewer to higher tsunamis.

Which is the Best Explanation for How Earthquakes Cause Tsunamis

An earthquake with a magnitude above 6.5 and below 7.5

An earthquake of this magnitude is likely to generate a tsunami. It is generated due to small changes in sea level. This tsunami never did any much destruction but has the capability to cause damage and causalities. Most of the time it is generated due to human activities.

An earthquake with a magnitude above 7.6 and below 7.8

The earthquakes of this magnitude can trigger large tsunamis that can produce destruction. Especially near the epicenter (the is the point on the earth’s surface that is vertically above the focus of an earthquake).

When this type of tsunami is generated it can be sensed from the distance’s places with small sea-level changes and minor waves but tsunamis that can produce damage to distances places are very rare in this type.

An earthquake that has a greater magnitude than 7.9

Earthquakes of this magnitude can trigger destructive tsunamis that can instigate immense damage. Significant or visible sea level changes might be seen in the distance’s places from the epicenter.

Hence. earthquake is a major factor causing tsunamis.

Read More about how dangerous are tsunamis

Here are some of the tsunamis from the past that have been caused by earthquakes:


Sumatra, Indonesia – 26 December 2004

This tsunami was caused by an earthquake that had a magnitude of 9.1 off the coastline of Sumatra. This earthquake occurred at an intensity of 30 km. the tsunami was 50km tall that reached 5 km inward in the vicinity of Meubolah, Sumatra [1].

This was the most broadly recorded tsunami with nearly one thousand merged tide gauge and witnesses the measurements from around the world, following places from the US, the UK, and Antarctica did report the height.

North Pacific Coast, Japan – 11 March 2011

This tsunami was generated from an earthquake that had a magnitude of 9.0 that reached depths of 24.4km- making it the fourth-largest earthquake ever recorded.

This tsunami traveled 800km per hour with 10m tall waves flew over the east coastline of Japan, which had killed more than 18,000 people.

Lisbon, Portugal – 1 November 1755

This tsunami was generated by an earthquake that had a magnitude of 8.5. it affected three huge waves that strike on several cities near the west coastline of southern Spain and Portugal.

In some places it was recorded at 30 m high, its waves did see from faraway places as Carlisle Bay, Barbados. The earthquake-generated tsunami had killed 60.000 people in Portugal, Morocco, and in Spain.








How Dangerous are Tsunamis?

Tsunamis are very dangerous waves that have the power to demolish coastlines rapidly.

Envision playing by the ocean, when unexpectedly, the water drops. Where the water used to be, there are ribbons of seaweed and wriggling fish. What do you do? It might be the first sign of tsunamis.  

A tsunami is a long wave that’s shaped in the ocean when the seafloor moves abruptly. Most tsunamis occur due to huge earthquakes on the ocean floor. Others develop due to volcanoes, landslides, or even meteors going into the ocean. The reason for a tsunami can be far away, on the other side of the ocean. 

Numerous tsunamis are small. Though, they also can be huge, over 10 feet high or more. When the water rises that much, it moves powerfully and fast. Tsunamis are natural. But, when they reach people, they become disastrous.

Why are Tsunamis so Deadly?

Hard to detect and predict: This is because they have a very long wavelength and a small wave height offshore. For this reason, they can go unnoticed at sea, having only a little swell typically around 12 inches over the standard sea surface.

Speed and size: What makes these vast waves so deadly is because they increase in speed and height as they get to shallow water. Because of the high energy involved and the immense volumes of water, tsunamis can demolish coastal regions.

A tsunami can happen in any tidal state and even at low tide, it can still inundate coastal areas. Over 80% of tsunamis happen in the Pacific Ocean. Tsunamis are a common occurrence in Japan.

Landslides, earthquakes, volcanic eruptions, and other underwater explosions all have the power to trigger a tsunami. Scientists now use the word “tsunami” in favor of tidal waves. They have nothing to do with the tides.

Hopefully, with every tragedy, scientists can discover more about early detection and warning signs. The truth is:  when mother nature roars, we are at her mercy.